Where Are RAID Settings Stored

Hello, I am wanting to eventually migrate from software RAID to hardware.
I remember one time I attempted to migrate a system with software RAID to a non-RAID system but of course it crashed because it was expecting RAID at the new location.
I need to be able to copy an entire filesystem from a software-RAID system without this being an issue, so mainly I need to know which files/folders to skip.
Thanks in advance.


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Re-assembled Software Raid5 Now With No File System

Hi All

Please could someone assist me with a software raid 5 array issue i am having?

About a week or so ago i was asked to have a look at a mate of mine's Company Server that had crashed after a power failure - no ups and close to 9GB data with no backup.
HP Proliant mini server running OpenMediaVault v1.9. with a software raid5 setup consisting of 4x 3TB Western Digital Hard drives


The 80GB boot drive crashed (hardware malfunction) so i replaced it and installed the server with OpenMediaVault 1.9 as was previously installed. When starting up however i noticed that none of the shares were available and upon closer inspection discovered that the raid to had crashed. I therefore re-assembled the raid but now have no file system nor any partitions on any of the 4x drives.

This is about the extent of my knowledge base when it comes to Linux, and again i don't know that i'd want to risk it with no backup of the data.

I have run fsck /dev/md1, but this reports an error 2 while executing fsck.linux_raid_member not found.
Please i am desperate for some advise!

Thanks
Wayne

How To Force Our 500 GB Drive To Be The SDA Drive Instead Of Our Raid Array

We are going in cricles to try to get our Ubuntu installation (14.04.1) to allow us to load Ubuntu's operating system to the 500 GB drive which is always set up somehow as SDC. We do not want the BOOT LOADER on the RAID Arrays, but on the 500 GB drive. We have two sets of RAID arrays in one box/enclosure.

/dev/sda - 18 TB RAID Array
/dev/sdb - 12 TB RAID Array
/dev/sdc - 500 GB Raptor Drive <-- We want this one to be the sda drive and where we'd load the BOOT LOADER also.

How do we do this?

Dell Poweredge Sc1425 Newer Raid Cards

Hi newbie here, learning Windows server 2008 online and have got two rack servers, one poweredge 2650, poweredge sc1425.

I have looked on search engines and eBay for a compatible raid card that I can use with 2.5 sata drives as I can fit more in the sc1425 this way.

It there a repository list of fairly up to date compatible cards.
*
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Have cought my eye as possible candidates. Any help would be greatly appreciated.
Steven

RAID Mistake

Hello,
I installed CentOS on software RAID10 but made the mistake of installing /boot on /dev/sda instead of on md0. Now I fear that if sda fails my system won't be bootable. Is there a way to correct this?
I can't reinstall because we need the server online.

Question About A=setting Up A RAID Array Using Mdadm

Hi All;
I am new to Linux and Ubuntu. I am setting up a RAID for a media server and want to be sure I do it right and in the proper order.

Based upon feedback received on this forum I think it makes most sense to partition my 4 TB disks into 2 partitions of 2 TB each.

So am I correct in running MDADM FIRST on both (Unpartitioned) 4 TB disks to create RAID 1 and then partition (Using Parted) the resulting single 4 TB disk that I create with MDADM into two 2 TB partitions? Thanks.

Tim

Cron Ignoring Changes Made In File

Hi,

i have a small problem on my system... I recently wrote a small bash script and added it via crontab -u root -e and it's executed as it should.
Then a few days after i did edit my bash script, but once it is run by cron it doesn't reflect the changes i made to the script. I did manually restart crond, tryed sync, moved my script, renamed it even rstart the server - no success.
If i run my script manually it returns me the expected output.
part of my script (/root/sd.sh):
Code:
#!/bin/sh

echo -n "Checking Raid... "
RAID=`tw-cli /c0/u0 show status | cut -c17-31 | grep -ci OK`
RAIDSTATUS=`tw-cli /c0/u0 show status | head -n1 | cut -c17-31`
if [ $RAID -eq 0 ]; then
  VERIFYING=`tw-cli /c0/u0 show status | cut -c17-31 | grep -ci VERIFYING`
  REBUILDING=`tw-cli /c0/u0 show status | cut -c17-31 | grep -ci REBUILDING`
  if [ $VERIFYING -eq 1 ]; then
    CURRENTSTATUS=`tw-cli /c0/u0 show verifystatus | head -n1 | cut -c46-49`
  fi
  if [ $REBUILDING -eq 1 ]; then
    CURRENTSTATUS=`tw-cli /c0/u0 show rebuildstatus | head -n1 | cut -c47-50`
  fi
  echo "Raid is busy (Raid $RAIDSTATUS$CURRENTSTATUS)"
  exit 1
fi
echo "Raid is idle (Raid $RAIDSTATUS)"

echo -n "Checking for logged in Users... "
USERS=`who | wc -l`
if [ $USERS -gt 0 ]; then
  echo "Users online"
  exit 1
fi
echo "None logged in"

crontab -l :
Code:
root@monster:~# crontab -l
# Edit this file to introduce tasks to be run by cron.
#
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
#
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').#
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h  dom mon dow   command
*/10 * * * * /root/sd.sh | logger
*/30 * * * * /root/dropbox.sh > /dev/null

syslog:
Code:
Mar 21 09:10:01 monster /USR/SBIN/CRON[3998]: (root) CMD (/root/sd.sh | logger)
Mar 21 09:10:01 monster logger: Checking Raid... Raid is busy (Raid )
Mar 21 09:17:01 monster /USR/SBIN/CRON[4045]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Mar 21 09:20:01 monster /USR/SBIN/CRON[4105]: (root) CMD (/root/sd.sh | logger)
Mar 21 09:20:01 monster logger: Checking Raid... Raid is busy (Raid )
Mar 21 09:30:01 monster /USR/SBIN/CRON[4266]: (root) CMD (/root/sd.sh | logger)
Mar 21 09:30:01 monster /USR/SBIN/CRON[4265]: (root) CMD (/root/dropbox.sh > /dev/null)
Mar 21 09:30:01 monster logger: Checking Raid... Raid is busy (Raid )

when i run sh /root/sd.sh
Code:
root@monster:~# sh /root/sd.sh
Checking Raid... Raid is idle (Raid OK)
Checking for logged in Users... Users online
root@monster:~#

Any ideas why? - any help or thoughts appreciated

regards
Pat

Question About RAID Disk

Hello All;
I was able to create a RAID array mode 1 using two 4TB drives but the resulting array (md0) is listed as "4.0 TB Unknown" in the Disks gui.

I am wondering if this is correct to leave it as-is or if I have to set this to a partition type (ext4?)for it to work properly?

Thanks.

Tim

Ddrescue RAID

Hello,
I have a server with hardware RAID so both drives show up as a single volume.
If I create a clone of this with ddrescue to a single disk, then ddrescue it back, will it still be bootable? I did attempt to boot the single disk on another computer but it failed so I'm a bit concerned whether my clone is any good.

Degraded RAID 1 Mdadm

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

Second Hard Drive Showing First Drive / When Mounted

On my current system I have drives sda, sdb, sdc; 1TB, 1.5TB, 1.5TB respectively.
SATA drive a is where I installed the OS and the other SATA drives b and c are from an old system that was linux software mirror, something I was using to play and learn. Now I have added b and c to my current system and before doing so I stopped the mirror and removed the partitions. I added the drives to my current system and used cfdisk to create one partition on each and then mounted the new drives. I then run ls and I see bin/....etc. listed in the new drive. Is this normal or when I create the new drive partitions should I use Logical instead of Primary.

Is there a way to get my drives back to non raid that I have missed doing?

Thanks