Hi all,
I made a raid5 array with command
mdadm -Cv /dev/md3 -n5 -x1 -l5 /dev/sd{a,b,c,d,e,f}1
It took me a while to undertand that while syncing a raid5 mdadm --detail
marks as failed the spare disk + 1. Is that correct? here the output before
it was finished and afterwords. The last one really was produced by mdadm 1.5,
the first one by mdadm 1.2, since
####### mdadm --detail /dev/md3 mdadm v. 1.2 - while syncing #############
root@nas-macpro root # mdadm --detail /dev/md3
/dev/md3:
Version : 00.90.00
Creation Time : Thu Apr 22 12:55:22 2004
Raid Level : raid5
Array Size : 980317696 (934.90 GiB 1003.85 GB)
Device Size : 245079424 (233.73 GiB 250.96 GB)
Raid Devices : 5
Total Devices : 7
Preferred Minor : 3
Persistence : Superblock is persistent
Update Time : Thu Apr 22 12:55:22 2004
State : dirty, no-errors
Active Devices : 4
Working Devices : 6
Failed Devices : 1
Spare Devices : 2
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/scsi/host0/bus0/target0/lun0/part1
1 8 17 1 active sync /dev/scsi/host0/bus0/target1/lun0/part1
2 8 33 2 active sync /dev/scsi/host0/bus0/target2/lun0/part1
3 8 49 3 active sync /dev/scsi/host1/bus0/target0/lun0/part1
4 0 0 4 faulty
5 8 81 5 /dev/scsi/host1/bus0/target2/lun0/part1
6 8 65 6 /dev/scsi/host1/bus0/target1/lun0/part1
UUID : 74aad38c:ee99c8cd:e8df8d30:c2d07f91
Events : 0.1
####### mdadm --detail /dev/md3 mdadm v. 1.5 -sync finished #############
root@nas-macpro root # mdadm --detail /dev/md3
/dev/md3:
Version : 00.90.00
Creation Time : Thu Apr 22 12:55:22 2004
Raid Level : raid5
Array Size : 980317696 (934.90 GiB 1003.85 GB)
Device Size : 245079424 (233.73 GiB 250.96 GB)
Raid Devices : 5
Total Devices : 7
Preferred Minor : 3
Persistence : Superblock is persistent
Update Time : Thu Apr 22 17:22:01 2004
State : dirty, no-errors
Active Devices : 5
Working Devices : 6
Failed Devices : 1
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/scsi/host0/bus0/target0/lun0/part1
1 8 17 1 active sync /dev/scsi/host0/bus0/target1/lun0/part1
2 8 33 2 active sync /dev/scsi/host0/bus0/target2/lun0/part1
3 8 49 3 active sync /dev/scsi/host1/bus0/target0/lun0/part1
4 8 65 4 active sync /dev/scsi/host1/bus0/target1/lun0/part1
5 8 81 5 spare /dev/scsi/host1/bus0/target2/lun0/part1
UUID : 74aad38c:ee99c8cd:e8df8d30:c2d07f91
Events : 0.2
##########################################################################
in both output I see 7 'Total devices' and 1 Failed but I don't have any
failed in reality nor in the last part of the output. Am I misunderstanding
the output?
Last question: what is the meaning of 'Events: 0.2' (0.1 during syncing)?
Thaks in advance
sandro
*:-)
--
Sandro Dentella *:-)
e-mail: sandro.dentella@tin.it
http://www.tksql.org TkSQL Home page - My GPL work
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