Hello Sirs,
In the below output for few of the hosts/paths there are 4 links and for few there are 2. Why is that so. How do I find out how many paths are there in total that are connected and in use. We are using native multipaths. How do I know what file systems are there on what devices. Please explain or direct me to a link where I can learn about multipaths. Also please explain the difference between "multipath -ll" and "multipath -l"
root@xxXXxxXX [/root]
# multipath -ll
mpathr (820060e8006d945444444d9458282183e) dm-21 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:41 sdbi 67:192 active ready running
`- 2:0:4:41 sdfd 129:240 active ready running
mpathak (8238a95f2258000748844444444444416) dm-15 IBM,2145
size=1.0T features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:0:6 sdh 8:112 active ready running
| |- 2:0:1:6 sdds 71:160 active ready running
| |- 1:0:1:6 sdt 65:48 active ready running
| `- 2:0:0:6 sddg 70:224 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:2:6 sdaf 65:240 active ready running
|- 2:0:3:6 sdeq 129:32 active ready running
|- 1:0:3:6 sdar 66:176 active ready running
`- 2:0:2:6 sdee 128:96 active ready running
data16 (820060e8006d945444444d94582821833) dm-67 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:30 sdcw 70:64 active ready running
`- 2:0:5:30 sdgr 132:112 active ready running
mpathe (820060e8006d945444444d94582821f17) dm-45 HITACHI,OPEN-V
size=35G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:12 sdce 69:32 active ready running
`- 2:0:5:12 sdfz 131:80 active ready running
data0 (820060e8006d945444444d94582821815) dm-43 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:14 sdcg 69:64 active ready running
`- 2:0:5:14 sdgb 131:112 active ready running
mpathq (820060e8006d945444444d9458282184a) dm-34 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:53 sdbu 68:128 active ready running
`- 2:0:4:53 sdfp 130:176 active ready running
mpathaj (8238a95f2258000748844444444444415) dm-13 IBM,2145
size=1.0T features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:2:5 sdae 65:224 active ready running
| |- 2:0:3:5 sdep 129:16 active ready running
| |- 1:0:3:5 sdaq 66:160 active ready running
| `- 2:0:2:5 sded 128:80 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:0:5 sdg 8:96 active ready running
|- 2:0:0:5 sddf 70:208 active ready running
|- 1:0:1:5 sds 65:32 active ready running
`- 2:0:1:5 sddr 71:144 active ready running
data15 (820060e8006d945444444d94582821832) dm-58 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:29 sdcv 70:48 active ready running
`- 2:0:5:29 sdgq 132:96 active ready running
mpathd (820060e8006d945444444d94582821f15) dm-37 HITACHI,OPEN-V
size=20G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:4 sdby 68:192 active ready running
`- 2:0:5:4 sdft 130:240 active ready running
flash4 (820060e8006d945444444d94582822033) dm-44 HITACHI,OPEN-V
size=200G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:9 sdcc 69:0 active ready running
`- 2:0:5:9 sdfx 131:48 active ready running
mpathp (820060e8006d945444444d94582821842) dm-24 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:45 sdbm 68:0 active ready running
`- 2:0:4:45 sdfh 130:48 active ready running
mpathai (8238a95f2258000748844444444444414) dm-9 IBM,2145
size=1.0T features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:0:4 sdf 8:80 active ready running
| |- 2:0:0:4 sdde 70:192 active ready running
| |- 1:0:1:4 sdr 65:16 active ready running
| `- 2:0:1:4 sddq 71:128 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:2:4 sdad 65:208 active ready running
|- 2:0:2:4 sdec 128:64 active ready running
|- 1:0:3:4 sdap 66:144 active ready running
`- 2:0:3:4 sdeo 129:0 active ready running
data14 (820060e8006d945444444d94582821831) dm-55 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:28 sdcu 70:32 active ready running
`- 2:0:5:28 sdgp 132:80 active ready running
mpathc (820060e8006d945444444d94582821f12) dm-41 HITACHI,OPEN-V
size=20G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:1 sdbv 68:144 active ready running
`- 2:0:5:1 sdfq 130:192 active ready running
flash3 (820060e8006d945444444d94582822032) dm-42 HITACHI,OPEN-V
size=200G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:8 sdcb 68:240 active ready running
`- 2:0:5:8 sdfw 131:32 active ready running
mpatho (820060e8006d945444444d9458282183a) dm-18 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:37 sdbe 67:128 active ready running
`- 2:0:4:37 sdez 129:176 active ready running
mpathah (8238a95f2258000748844444444444413) dm-5 IBM,2145
size=1.0T features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:2:3 sdac 65:192 active ready running
| |- 2:0:2:3 sdeb 128:48 active ready running
| |- 1:0:3:3 sdao 66:128 active ready running
| `- 2:0:3:3 sden 128:240 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:0:3 sde 8:64 active ready running
|- 2:0:0:3 sddd 70:176 active ready running
|- 1:0:1:3 sdq 65:0 active ready running
`- 2:0:1:3 sddp 71:112 active ready running
data13 (820060e8006d945444444d94582821830) dm-54 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:27 sdct 70:16 active ready running
`- 2:0:5:27 sdgo 132:64 active ready running
mpathb (820060e8006d945444444d94582821f14) dm-82 HITACHI,OPEN-V
size=20G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:3 sdbx 68:176 active ready running
`- 2:0:5:3 sdfs 130:224 active ready running
mpathag (8238a95f2258000748844444444444419) dm-29 IBM,2145
size=1.0T features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:2:9 sdai 66:32 active ready running
| |- 2:0:3:9 sdet 129:80 active ready running
| |- 1:0:3:9 sdau 66:224 active ready running
| `- 2:0:2:9 sdeh 128:144 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:0:9 sdk 8:160 active ready running
|- 2:0:1:9 sddv 71:208 active ready running
|- 1:0:1:9 sdw 65:96 active ready running
`- 2:0:0:9 sddj 71:16 active ready running
mpathn (820060e8006d945444444d94582821844) dm-27 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:47 sdbo 68:32 active ready running
`- 2:0:4:47 sdfj 130:80 active ready running
data12 (820060e8006d945444444d9458282182f) dm-66 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:26 sdcs 70:0 active ready running
`- 2:0:5:26 sdgn 132:48 active ready running
mpatha (820060e8006d945444444d94582821f13) dm-62 HITACHI,OPEN-V
size=20G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:2 sdbw 68:160 active ready running
`- 2:0:5:2 sdfr 130:208 active ready running
data9 (820060e8006d945444444d9458282181c) dm-52 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:21 sdcn 69:176 active ready running
`- 2:0:5:21 sdgi 131:224 active ready running
mpathz (820060e8006d945444444d9458282183b) dm-16 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:38 sdbf 67:144 active ready running
`- 2:0:4:38 sdfa 129:192 active ready running
mpathm (820060e8006d945444444d94582821840) dm-22 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:43 sdbk 67:224 active ready running
`- 2:0:4:43 sdff 130:16 active ready running
mpathaf (8238a95f2258000748844444444444417) dm-10 IBM,2145
size=1.0T features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:2:7 sdag 66:0 active ready running
| |- 2:0:3:7 sder 129:48 active ready running
| |- 1:0:3:7 sdas 66:192 active ready running
| `- 2:0:2:7 sdef 128:112 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:0:7 sdi 8:128 active ready running
|- 2:0:1:7 sddt 71:176 active ready running
|- 1:0:1:7 sdu 65:64 active ready running
`- 2:0:0:7 sddh 70:240 active ready running
data8 (820060e8006d945444444d9458282182c) dm-68 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:23 sdcp 69:208 active ready running
`- 2:0:5:23 sdgk 132:0 active ready running
data11 (820060e8006d945444444d9458282182e) dm-57 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:25 sdcr 69:240 active ready running
`- 2:0:5:25 sdgm 132:32 active ready running
mpathy (820060e8006d945444444d9458282183f) dm-25 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:42 sdbj 67:208 active ready running
`- 2:0:4:42 sdfe 130:0 active ready running
mpathl (820060e8006d945444444d94582821848) dm-33 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:51 sdbs 68:96 active ready running
`- 2:0:4:51 sdfn 130:144 active ready running
mpathae (8238a95f2258000748844444444444410) dm-2 IBM,2145
size=1.0T features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:0:0 sdb 8:16 active ready running
| |- 2:0:0:0 sdda 70:128 active ready running
| |- 1:0:1:0 sdn 8:208 active ready running
| `- 2:0:1:0 sddm 71:64 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:2:0 sdz 65:144 active ready running
|- 2:0:3:0 sdek 128:192 active ready running
|- 1:0:3:0 sdal 66:80 active ready running
`- 2:0:2:0 sddy 128:0 active ready running
data7 (820060e8006d945444444d9458282181d) dm-56 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:22 sdco 69:192 active ready running
`- 2:0:5:22 sdgj 131:240 active ready running
data10 (820060e8006d945444444d9458282182d) dm-53 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:24 sdcq 69:224 active ready running
`- 2:0:5:24 sdgl 132:16 active ready running
mpathaq (8238a95f22580007488444444444444b3) dm-38 IBM,2145
size=256G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:3:11 sdaw 67:0 active ready running
| |- 2:0:2:11 sdej 128:176 active ready running
| |- 1:0:2:11 sdak 66:64 active ready running
| `- 2:0:3:11 sdev 129:112 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:0:11 sdm 8:192 active ready running
|- 2:0:0:11 sddl 71:48 active ready running
|- 1:0:1:11 sdy 65:128 active ready running
`- 2:0:1:11 sddx 71:240 active ready running
mpathx (820060e8006d945444444d94582821841) dm-23 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:44 sdbl 67:240 active ready running
`- 2:0:4:44 sdfg 130:32 active ready running
mpathk (820060e8006d945444444d9458282183c) dm-19 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:39 sdbg 67:160 active ready running
`- 2:0:4:39 sdfb 129:208 active ready running
mpathad (8238a95f2258000748844444444444411) dm-3 IBM,2145
size=1.0T features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:2:1 sdaa 65:160 active ready running
| |- 2:0:3:1 sdel 128:208 active ready running
| |- 1:0:3:1 sdam 66:96 active ready running
| `- 2:0:2:1 sddz 128:16 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:0:1 sdc 8:32 active ready running
|- 2:0:0:1 sddb 70:144 active ready running
|- 1:0:1:1 sdo 8:224 active ready running
`- 2:0:1:1 sddn 71:80 active ready running
data6 (820060e8006d945444444d9458282181b) dm-65 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:20 sdcm 69:160 active ready running
`- 2:0:5:20 sdgh 131:208 active ready running
mpathw (820060e8006d945444444d94582821849) dm-30 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:52 sdbt 68:112 active ready running
`- 2:0:4:52 sdfo 130:160 active ready running
mpathac (820060e8006d945444444d94582821843) dm-26 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:46 sdbn 68:16 active ready running
`- 2:0:4:46 sdfi 130:64 active ready running
mpathj (820060e8006d945444444d94582821838) dm-14 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:35 sdbc 67:96 active ready running
`- 2:0:4:35 sdex 129:144 active ready running
data5 (820060e8006d945444444d9458282181a) dm-48 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:19 sdcl 69:144 active ready running
`- 2:0:5:19 sdgg 131:192 active ready running
data23 (820060e8016726a828201726a8282172f) dm-8 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:4:57 sdba 67:64 active ready running
`- 2:0:6:57 sdgy 132:224 active ready running
mpathv (820060e8006d945444444d94582821845) dm-28 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:48 sdbp 68:48 active ready running
`- 2:0:4:48 sdfk 130:96 active ready running
mpathi (820060e8006d945444444d94582822031) dm-40 HITACHI,OPEN-V
size=200G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:7 sdca 68:224 active ready running
`- 2:0:5:7 sdfv 131:16 active ready running
mpathab (820060e8006d945444444d94582821847) dm-32 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:50 sdbr 68:80 active ready running
`- 2:0:4:50 sdfm 130:128 active ready running
data4 (820060e8006d945444444d94582821819) dm-51 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:18 sdck 69:128 active ready running
`- 2:0:5:18 sdgf 131:176 active ready running
data22 (820060e8016726a828201726a8282172d) dm-7 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:4:55 sday 67:32 active ready running
`- 2:0:6:55 sdgw 132:192 active ready running
mpathan (8238a95f2258000748844444444444418) dm-20 IBM,2145
size=1.0T features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:0:8 sdj 8:144 active ready running
| |- 2:0:0:8 sddi 71:0 active ready running
| |- 1:0:1:8 sdv 65:80 active ready running
| `- 2:0:1:8 sddu 71:192 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:2:8 sdah 66:16 active ready running
|- 2:0:2:8 sdeg 128:128 active ready running
|- 1:0:3:8 sdat 66:208 active ready running
`- 2:0:3:8 sdes 129:64 active ready running
mpathu (820060e8006d945444444d94582821839) dm-12 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:82 sdbd 67:112 active ready running
`- 2:0:4:82 sdey 129:160 active ready running
data19 (820060e8006d945444444d94582821882) dm-61 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:33 sdcz 70:112 active ready running
`- 2:0:5:33 sdgu 132:160 active ready running
mpathh (820060e8006d945444444d94582822030) dm-39 HITACHI,OPEN-V
size=200G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:6 sdbz 68:208 active ready running
`- 2:0:5:6 sdfu 131:0 active ready running
mpathaa (820060e8006d945444444d94582821837) dm-11 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:34 sdbb 67:80 active ready running
`- 2:0:4:34 sdew 129:128 active ready running
data3 (820060e8006d945444444d94582821817) dm-47 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:16 sdci 69:96 active ready running
`- 2:0:5:16 sdgd 131:144 active ready running
data21 (820060e8016726a828201726a8282172c) dm-6 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:4:54 sdax 67:16 active ready running
`- 2:0:6:54 sdgv 132:176 active ready running
mpatht (820060e8006d945444444d9458282183d) dm-17 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:40 sdbh 67:176 active ready running
`- 2:0:4:40 sdfc 129:224 active ready running
mpatham (8238a95f2258000748844444444444412) dm-4 IBM,2145
size=1.0T features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:0:2 sdd 8:48 active ready running
| |- 2:0:1:2 sddo 71:96 active ready running
| |- 1:0:1:2 sdp 8:240 active ready running
| `- 2:0:0:2 sddc 70:160 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:2:2 sdab 65:176 active ready running
|- 2:0:2:2 sdea 128:32 active ready running
|- 1:0:3:2 sdan 66:112 active ready running
`- 2:0:3:2 sdem 128:224 active ready running
mpathg (820060e8006d945444444d94582822037) dm-64 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:13 sdcf 69:48 active ready running
`- 2:0:5:13 sdga 131:96 active ready running
data18 (820060e8006d945444444d94582821835) dm-60 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:32 sdcy 70:96 active ready running
`- 2:0:5:32 sdgt 132:144 active ready running
data20 (820060e8016726a828201726a8282172e) dm-50 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:4:56 sdaz 67:48 active ready running
`- 2:0:6:56 sdgx 132:208 active ready running
data2 (820060e8006d945444444d94582821818) dm-49 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:17 sdcj 69:112 active ready running
`- 2:0:5:17 sdge 131:160 active ready running
mpathal (8238a95f225800074884444444444441a) dm-35 IBM,2145
size=589G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:0:10 sdl 8:176 active ready running
| |- 2:0:1:10 sddw 71:224 active ready running
| |- 1:0:1:10 sdx 65:112 active ready running
| `- 2:0:0:10 sddk 71:32 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 1:0:2:10 sdaj 66:48 active ready running
|- 2:0:3:10 sdeu 129:96 active ready running
|- 1:0:3:10 sdav 66:240 active ready running
`- 2:0:2:10 sdei 128:160 active ready running
mpaths (820060e8006d945444444d94582821846) dm-31 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:5:49 sdbq 68:64 active ready running
`- 2:0:4:49 sdfl 130:112 active ready running
mpathf (820060e8006d945444444d94582822034) dm-63 HITACHI,OPEN-V
size=275G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:10 sdcd 69:16 active ready running
`- 2:0:5:10 sdfy 131:64 active ready running
data17 (820060e8006d945444444d94582821834) dm-59 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:31 sdcx 70:80 active ready running
`- 2:0:5:31 sdgs 132:128 active ready running
data1 (820060e8006d945444444d94582821816) dm-46 HITACHI,OPEN-V
size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 1:0:6:15 sdch 69:80 active ready running
`- 2:0:5:15 sdgc 131:128 active ready running
root@xxXXxxXX [/root]
My Oracle RAC 12.1.0.1 runs on ASM. ASM has an I/O timeout of 15 seconds. How do I find my Linux native multipath I/O timeout? I am running RedHat Linux 6 Enterprise, x86-64.
This is the device section of my multipath.conf
devices{
device {
vendor "NETAPP"
product "LUN.*"
path_grouping_policy group_by_prio
getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
path_selector "round-robin 0"
path_checker tur
features "3 queue_if_no_path pg_init_retries 50"
hardware_handler "0"
prio ontap
failback immediate
rr_weight uniform
rr_min_io 128
rr_min_io_rq 1
flush_on_last_del yes
fast_io_fail_tmo 5
dev_loss_tmo infinity
retain_attached_hw_handler yes
detect_prio yes
}
}
Thanks,
keith
If you run this command on your computer, how many active and passive connections openings are you typically supposed to have? Specifically, for a firewalled home PC behind a wifi router/cable modem combination. Can someone explain the purpose of this command?
I have a degraded software RAID 1 array. md0 is in a state of clean, degraded while md1 is mounted in read-only and clean. I'm not sure how to go about fixing this. Any ideas?
cat /proc/mdstat
Code:
Personalities : [raid1]
md1 : active (auto-read-only) raid1 sdb2[1] sda2[0]
3909620 blocks super 1.2 [2/2] [UU]
md0 : active raid1 sda1[0]
972849016 blocks super 1.2 [2/1] [U_]
unused devices: <none>
mdadm -D /dev/md0
Code:
/dev/md0:
Version : 1.2
Creation Time : Tue Jun 21 21:31:58 2011
Raid Level : raid1
Array Size : 972849016 (927.78 GiB 996.20 GB)
Used Dev Size : 972849016 (927.78 GiB 996.20 GB)
Raid Devices : 2
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Tue Jun 2 02:21:12 2015
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Name :
UUID :
Events : 3678064
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
2 0 0 2 removed
mdadm -D /dev/md1
Code:
/dev/md1:
Version : 1.2
Creation Time : Tue Jun 21 21:32:09 2011
Raid Level : raid1
Array Size : 3909620 (3.73 GiB 4.00 GB)
Used Dev Size : 3909620 (3.73 GiB 4.00 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Sat May 16 15:17:56 2015
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name :
UUID :
Events : 116
Number Major Minor RaidDevice State
0 8 2 0 active sync /dev/sda2
1 8 18 1 active sync /dev/sdb2
I am running two linux web-servers. One I am just setting up. On the other, I noted the following partition:
Code:
>df -h
Filesystem Size Used Avail Use Mounted on
/dev/mapper/Machinename-root 27G 4.1G 21G 17 /
udev 996M 12K 996M 1 /dev
tmpfs 202M 792K 201M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 1006M 224K 1006M 1% /run/shm
/dev/sda1 228M 90M 126M 42% /boot
/home/Amy/.Private 27G 4.1G 21G 17% /home/Amy
But on the one that I am installing, so far I get this:
Code:
>df -h
Filesystem Size Used Avail Use% Mounted on
udev 996M 12K 996M 1% /dev
tmpfs 202M 792K 201M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 1006M 224K 1006M 1% /run/shm
/dev/sda1 228M 90M 126M 42% /boot
How did I get /dev/mapper partition?
Hi All,
I had installed Cent OS 6.6 on sda. The RAID1 and LVM setup was on sdb and sdc. To practice well on recovering RAID and LVM after the OS reinstallation, I just reinstalled the OS. During first re installation of OS, I had selected all the mount points including RAID/LVM partitions as same as how those where mounted before the reinstallation, but the format was selected to only /, /others, /var. And after booting /dev/md0 and LVM partitions were set to active automatically and everything was mounted properly. Also there was no any data loss in the RAID/LVM partitions. So I could made sure that everything will be perfect if we carefully select the mount points during OS reinstallation by making sure the formating partitions.
Now I thouht of reinstalling OS once again but this time didn't select mount points for RAID/LVM partitions during OS reinstallation, thought for manual setup after the installation. So just selected /, /others, /var partitions to format. When it booted, I ran "cat /proc/mdstat" but it was taken /dev/md127(read only) instead of /dev/md0.
Code:
# cat /proc/mdstat
Personalities : [raid1]
md127 : active (auto-read-only) raid1 sdc[1] sdb[0]
52396032 blocks super 1.2 [2/2] [UU]
unused devices: <none>
So now I just wanted to stop and restart this RAID array as /dev/md0. But I am not able to stop as it is giving following error.
Code:
# mdadm --stop --force /dev/md127
mdadm: Cannot get exclusive access to /dev/md127:Perhaps a running process, mounted filesystem or active volume group?
I made sure that no one RAID/LVM partitions are mounted.
Code:
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 15G 3.5G 11G 26% /
tmpfs 376M 0 376M 0% /dev/shm
/dev/sda2 4.7G 9.8M 4.5G 1% /others
/dev/sda3 2.9G 133M 2.6G 5% /var
But LVM is active
Code:
# pvdisplay
--- Physical volume ---
PV Name /dev/md127
VG Name data
PV Size 49.97 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 12791
Free PE 5111
Allocated PE 7680
PV UUID IJ2br8-SWHW-cf1d-89Fr-EEw9-IJME-1BpfSj
# vgdisplay
--- Volume group ---
VG Name data
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 19
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 49.96 GiB
PE Size 4.00 MiB
Total PE 12791
Alloc PE / Size 7680 / 30.00 GiB
Free PE / Size 5111 / 19.96 GiB
VG UUID 982ay8-ljWY-kiPB-JY7F-pIu2-87uN-iplPEQ
# lvdisplay
--- Logical volume ---
LV Path /dev/data/home
LV Name home
VG Name data
LV UUID OAQp25-Q1TH-rekd-b3n2-mOkC-Zgyt-3fX2If
LV Write Access read/write
LV Status available
# open 0
LV Size 10.00 GiB
Current LE 2560
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/data/backup
LV Name backup
VG Name data
LV UUID Uq6rhX-AvPN-GaNe-zevB-k3iB-Uz0m-TssjCg
LV Write Access read/write
LV Status available
# open 0
LV Size 20.00 GiB
Current LE 5120
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
As LVM is active on /dev/md127 it is not allowing to stop /dev/md127 raid array. So as I am fresher in RAID/LVM, expecting your kind help to make LVM inactive without any data loss and restart the RAID array as /dev/md0 and then re activate the LVM setup.
Expecting your kind reply, Thanks.
UPDATED:
I installed a Deb 7 Srv w LVM w following partitions:
The end product should become a mail server (Citadel) and in time also a Web server.
Code:
df -hT
Filesystem Type Size Used Avail Use% Mounted on
rootfs rootfs 322M 141M 165M 46% /
udev devtmpfs 10M 0 10M 0% /dev
tmpfs tmpfs 100M 260K 100M 1% /run
/dev/mapper/deb--srv-root ext4 322M 141M 165M 46% /
tmpfs tmpfs 5,0M 0 5,0M 0% /run/lock
tmpfs tmpfs 200M 0 200M 0% /run/shm
/dev/sda1 ext2 228M 18M 199M 9% /boot
/dev/mapper/deb--srv-home ext4 233G 188M 221G 1% /home
/dev/mapper/deb--srv-tmp ext4 368M 11M 339M 3% /tmp
/dev/mapper/deb--srv-usr ext4 8,3G 481M 7,4G 6% /usr
/dev/mapper/deb--srv-var ext4 2,8G 236M 2,4G 9% /var
fdisk -l
Disk /dev/sda: 268.4 GB, 268435456000 bytes
255 heads, 63 sectors/track, 32635 cylinders, total 524288000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00064033
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 524285951 261892097 5 Extended
/dev/sda5 501760 524285951 261892096 8e Linux LVM
Disk /dev/mapper/deb--srv-root: 348 MB, 348127232 bytes
255 heads, 63 sectors/track, 42 cylinders, total 679936 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/deb--srv-root doesn't contain a valid partition table
Disk /dev/mapper/deb--srv-swap_1: 2143 MB, 2143289344 bytes
255 heads, 63 sectors/track, 260 cylinders, total 4186112 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/deb--srv-swap_1 doesn't contain a valid partition table
Disk /dev/mapper/deb--srv-usr: 8996 MB, 8996782080 bytes
255 heads, 63 sectors/track, 1093 cylinders, total 17571840 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/deb--srv-usr doesn't contain a valid partition table
Disk /dev/mapper/deb--srv-var: 2998 MB, 2998927360 bytes
255 heads, 63 sectors/track, 364 cylinders, total 5857280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/deb--srv-var doesn't contain a valid partition table
Disk /dev/mapper/deb--srv-tmp: 398 MB, 398458880 bytes
255 heads, 63 sectors/track, 48 cylinders, total 778240 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/deb--srv-tmp doesn't contain a valid partition table
Disk /dev/mapper/deb--srv-home: 253.3 GB, 253289824256 bytes
255 heads, 63 sectors/track, 30794 cylinders, total 494706688 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/deb--srv-home doesn't contain a valid partition table
pvs
PV VG Fmt Attr PSize PFree
/dev/sda5 deb-srv lvm2 a-- 249,76g 0
lvs
LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
home deb-srv -wi-ao-- 235,89g
root deb-srv -wi-ao-- 332,00m
swap_1 deb-srv -wi-ao-- 2,00g
tmp deb-srv -wi-ao-- 380,00m
usr deb-srv -wi-ao-- 8,38g
var deb-srv -wi-ao-- 2,79g
Now i want to _shrink_ the HOME partition so I can expand my VAR partition. Looked for guides but haven't found any site useful so far
I tried to find a way to do it when I installed it but it didn't seem to offer me this at this time even I looked around for a while.
How do I do this shrinking of HOME and extending of VAR partition??
please be fairly specific as Im not a pro yet
My real objective is to clean existing nodes from a Hadoop cluster, claim the space etc. and do a fresh installation of another distro.
Below is the space descr. of one of the master(namenode):
Code:
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg00-root
2.0G 739M 1.2G 39% /
tmpfs 24G 0 24G 0% /dev/shm
/dev/mapper/mpathap1 194M 65M 120M 36% /boot
/dev/mapper/vg00-home
248M 12M 224M 5% /home
/dev/mapper/vg00-nsr 248M 11M 226M 5% /nsr
/dev/mapper/vg00-opt 3.1G 79M 2.8G 3% /opt
/dev/mapper/vg00-itm 434M 11M 402M 3% /opt/IBM/ITM
/dev/mapper/vg00-tmp 2.0G 68M 1.9G 4% /tmp
/dev/mapper/vg00-usr 2.0G 1.6G 305M 85% /usr
/dev/mapper/vg00-usr_local
248M 11M 226M 5% /usr/local
/dev/mapper/vg00-var 2.0G 820M 1.1G 43% /var
/dev/mapper/vg00-FSImage
917G 3.3G 867G 1% /opt/hadoop-FSImage
/dev/mapper/vg00-Zookeeper
917G 200M 870G 1% /opt/hadoop-Zookeeper
And one of the slave(datanodes)(the others too have 4-8 local disks and some mounted NFS drives):
Code:
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg00-root
2.0G 411M 1.5G 22% /
tmpfs 36G 0 36G 0% /dev/shm
/dev/mapper/mpathap1 194M 67M 118M 37% /boot
/dev/mapper/vg00-home
248M 11M 226M 5% /home
/dev/mapper/vg00-nsr 248M 11M 226M 5% /nsr
/dev/mapper/vg00-opt 3.1G 82M 2.8G 3% /opt
/dev/mapper/vg00-itm 434M 11M 402M 3% /opt/IBM/ITM
/dev/mapper/vg00-tmp 2.0G 68M 1.9G 4% /tmp
/dev/mapper/vg00-usr 2.0G 1.2G 690M 64% /usr
/dev/mapper/vg00-usr_local
248M 11M 226M 5% /usr/local
/dev/mapper/vg00-var 2.0G 1.5G 392M 80% /var
/dev/mapper/vg00-00 559G 33M 559G 1% /opt/hadoop-00
/dev/mapper/vg00-01 559G 33M 559G 1% /opt/hadoop-01
/dev/mapper/vg00-02 559G 33M 559G 1% /opt/hadoop-02
/dev/mapper/vg00-03 559G 33M 559G 1% /opt/hadoop-03
/dev/mapper/vg00-04 559G 33M 559G 1% /opt/hadoop-04
/dev/mapper/vg00-05 559G 33M 559G 1% /opt/hadoop-05
/dev/mapper/vg00-06 559G 33M 559G 1% /opt/hadoop-06
/dev/mapper/vg00-07 559G 33M 559G 1% /opt/hadoop-07
During the new installation, I have run into space issues for all the nodes/hosts
Code:
Not enough disk space on host (l1032lab.se.com). A minimum of 1GB is required for "/usr" mount. A minimum of 2GB is required for "/" mount.
Not enough disk space on host (l1033lab.se.com). A minimum of 1GB is required for "/usr" mount. A minimum of 2GB is required for "/" mount.
Not enough disk space on host (l1034lab.se.com). A minimum of 1GB is required for "/usr" mount. A minimum of 2GB is required for "/" mount.
Not enough disk space on host (l1035lab.se.com). A minimum of 1GB is required for "/usr" mount. A minimum of 2GB is required for "/" mount.
Now the installation requires a lot of space under /, /usr, /var and /home mounts which on both master and the slaves is less but there is lots of space in master under these two disks:
Code:
/dev/mapper/vg00-FSImage
917G 200M 870G 1% /opt/hadoop-FSImage
/dev/mapper/vg00-Zookeeper
917G 6.5G 864G 1% /opt/hadoop-Zookeeper
and on slaves under these 8 disks.
Code:
/dev/mapper/vg00-00 559G 33M 559G 1% /opt/hadoop-00
/dev/mapper/vg00-01 559G 33M 559G 1% /opt/hadoop-01
/dev/mapper/vg00-02 559G 33M 559G 1% /opt/hadoop-02
/dev/mapper/vg00-03 559G 33M 559G 1% /opt/hadoop-03
/dev/mapper/vg00-04 559G 33M 559G 1% /opt/hadoop-04
/dev/mapper/vg00-05 559G 33M 559G 1% /opt/hadoop-05
/dev/mapper/vg00-06 559G 33M 559G 1% /opt/hadoop-06
/dev/mapper/vg00-07 559G 33M 559G 1% /opt/hadoop-07
I'm a bit confused as how to proceed - I was wondering if I can partition one or more of these disks and allocate those under /, /usr etc. and proceed with the installation but then will these disk partitioning and mounting/un-mounting corrupt the existing /, /usr etc. mounts ?
I was wondering if I can repair my current partitioning setup using gparted, or if I should just reload Xubuntu. Basically I screwed up by making the primary partition only 256M, and made a massive extended logical partition for everything else, and did not leave swap space. I am doing this on an older PC with MBR, dual processor, 2G RAM each processor, 160GB hard drive space. It is single boot, no Windows. I would like the partioning to be as follows, leaving empty disk space for other Linux flavors:
/ 13GB ext4
/home 50GB ext4
swap 8GB swap
sudo parted /dev/sda print all
Code:
Model: ATA ST3160812AS (scsi)
Disk /dev/sda: 160GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 256MB 255MB primary ext2 boot
2 257MB 160GB 160GB extended
5 257MB 160GB 160GB logical
Error: /dev/mapper/xubuntu--vg-swap_1: unrecognised disk label
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/xubuntu--vg-root: 158GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 158GB 158GB ext4
Error: /dev/mapper/sda5_crypt: unrecognised disk label
df -hT
Code:
Filesystem Type Size Used Avail Use Mounted on
/dev/mapper/xubuntu--vg-root ext4 145G 6.5G 131G 5% /
none tmpfs 4.0K 0 4.0K 0% /sys/fs/cgroup
udev devtmpfs 989M 4.0K 989M 1% /dev
tmpfs tmpfs 201M 1.1M 200M 1% /run
none tmpfs 5.0M 0 5.0M 0% /run/lock
none tmpfs 1003M 88K 1003M 1% /run/shm
none tmpfs 100M 24K 100M 1% /run/user
/dev/sda1 ext2 236M 120M 104M 54% /boot
/home/mbrk/.Private ecryptfs 145G 6.5G 131G 5% /home/mbrk