Need Help Fixing OS Raid 1
Hello,
The server OS RAID 1 is failed one disk.. now It has been replace new disk.
I need someone to rebuild the raid. via rescue mode
Tagged:
Hello,
The server OS RAID 1 is failed one disk.. now It has been replace new disk.
I need someone to rebuild the raid. via rescue mode
Comments
If you're not comfortable doing it, you should hire a tech.
@skorupion was looking for work?
If I had time I would rebuild it for him. Just a little bit in my plate for now. @skorupion should be able to handle it. If he isn't able or something comes up feel free to PM and we will see if we can sort it
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Steps to replace a broken disk in software RAID array.
Mark the disk as failed:
mdadm --manage /dev/md0 --fail /dev/sdb1
Verify:
cat /proc/mdstat
Example output:
Personalities : [linear] [multipath] [raid0] [raid1] [raid5] [raid4] [raid6] [raid10]
md0 : active raid1 sda1[0] sdb1 [2] (F)
976773168 blocks [2/1] [U_]
md1 : active raid1 sda2[0] sdb2[1]
976773168 blocks [2/2] [UU]
Remove disk from array:
mdadm --manage /dev/md0 --remove /dev/sdb1
P.S. You need to do the step 2 for each array, respectively replacing the partitions.
Replace disk on machine.
Copy partition table from the healthy disk to the replaced one.
sfdisk -d /dev/sda | sfdisk /dev/sdb
Add the replaced disk back to the array:
mdadm --manage /dev/md0 --add /dev/sdb1
P.S. You need to do the step 5 for each array, respectively replacing the partitions.
Verify with:
/sbin/mdadm --detail /dev/md0
or again:
cat /proc/mdstat
Get some hosting at https://drserver.net .
First step should be taking a full backup of all data while it's still accessible. If the remaining disk dies during rebuild you'll be f*cked. Any sysadmin taking on such jobs should clarify on the risks before and whose liability that is. Just saying. 😉
@skorupion did this get sorted or what? I want to drop it off my radar and move on.
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Yeah fixed itself, and was resynchronizing.
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Ok 👍 off to do some writing.
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