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ferrarif5
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Joined: 06 Sep 2003
Posts: 211
Location: Manchester, UK
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 Posted: Sat Sep 18, 2010 4:55 pm Post subject: Problem with RAID - Failed Mirror?[solved] |
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Hi,
I've noticed I now have a RAID device called md124, my guess it's part of a failed mirror RAID (belonging to md3), here is my RAID setup:
1. md1 - Mirror - (boot) sda1,sdb1
2. md2 - Mirror - (swap) sda2,sdb2
3. md3 - Mirror - (home) sda3,sdb3
4. md4 - Stripe - (/) sda4,sdb4
Here is the output of mdstat:
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$ cat /proc/mdstat
Personalities : [raid0] [raid1]
md3 : active raid1 sda3[0]
19542976 blocks [2/1] [U_]
md1 : active raid1 sdb1[1] sda1[0]
40064 blocks [2/2] [UU]
md2 : active raid1 sdb2[1] sda2[0]
11727360 blocks [2/2] [UU]
md124 : active raid1 sdb3[1]
19542976 blocks [2/1] [_U]
md4 : active raid0 sdb4[1] sda4[0]
1890898560 blocks 64k chunks
unused devices: <none>
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I've also noticed this on dmesg:
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3.752764] md: sda3 has same UUID but different superblock to sdb3
[ 3.752821] md: sda2 has different UUID to sdb3
[ 3.752876] md: sda1 has different UUID to sdb3
[ 3.753078] md: created md124
[ 3.753129] md: bind<sdb3>
[ 3.753244] md: running: <sdb3>
[ 3.759202] raid1: raid set md124 active with 1 out of 2 mirrors
[ 3.759268] md124: detected capacity change from 0 to 20012007424
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Is this due to a error in the superblock? What's the best way to fix this? Since it's just my home would it be easier to just remove the RAID, copy the contents to my / and recreate the RAID?
Thanks
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Asus P6X58D-E Mobo
Intel Core i7 920
18GB Corsair DDR3
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Last edited by ferrarif5 on Sat Sep 18, 2010 11:51 pm; edited 1 time in total |
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Sysa
Apprentice
Joined: 16 Mar 2005
Posts: 161
Location: Europe
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| Posted: Sat Sep 18, 2010 11:33 pm Post subject: Re: Problem with RAID - Failed Mirror? |
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| ferrarif5 wrote: | What's the best way to fix this? Since it's just my home would it be easier to just remove the RAID, copy the contents to my / and recreate the RAID?
Thanks |
mdadm --stop /dev/md124
mdadm /dev/md3 --add /dev/sdb3
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ferrarif5
Apprentice
Joined: 06 Sep 2003
Posts: 211
Location: Manchester, UK
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| Posted: Sat Sep 18, 2010 11:50 pm Post subject: |
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Thanks a lot!
That was the most painless fix for something yet 
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Intel Core i7 920
18GB Corsair DDR3
User:335876 | Screenshot |
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