Mailinglist Archive: opensuse (3156 mails)

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Re: [opensuse] Software Raid will not include one disk
  • From: todd@xxxxxxxxxxx
  • Date: Sun, 2 Dec 2007 14:42:04 -0500 (EST)
  • Message-id: <4311.99.234.57.40.1196624524.squirrel@xxxxxxxxxxxxxxxxxx>
orb:/etc # mdadm --detail --scan -vvv
/dev/md0:
Version : 00.90.03
Creation Time : Sun Dec 2 17:27:38 2007
Raid Level : raid5
Array Size : 2441912320 (2328.79 GiB 2500.52 GB)
Used Dev Size : 488382464 (465.76 GiB 500.10 GB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 0
Persistence : Superblock is persistent

Update Time : Sun Dec 2 17:27:38 2007
State : clean, degraded
Active Devices : 5
Working Devices : 6
Failed Devices : 0
Spare Devices : 1

Layout : left-symmetric
Chunk Size : 4096K

UUID : 837eecb4:28f004fb:0e4f8c91:f584a4b1
Events : 0.1

Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
2 8 49 2 active sync /dev/sdd1
3 8 65 3 active sync /dev/sde1
4 8 81 4 active sync /dev/sdf1
5 0 0 5 removed

6 8 97 - spare /dev/sdg1


All your disks are there, you can see the disk numbering starts at 0 and
goes to 4, that's 5 disks + your spare. I'm not exactly sure why its
showing the 5th entry, it looks like you've removed a disk from the array.
I'm sure there is a way to remove the number 5 drive from the array using
mdadm (I'm not familiar with the tool myself) and that should get you out
of the degraded state.

BTW using RAID 5 with +1 parity on 6 500G drives will result in about
66-70% storage. In your case it will be just over 2TB.

Cheers
Todd


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