Neil,
I've seen this before, but it is very reproducable on the SuSE/UL system
I am testing on now.
When I hotadd a new/replacement disk (sdb) into the raid device, the
resync doesn't start.
>From the superblocks, apparently the active disk still has total disks=1
so only 1 active, but the new disk superblock was written with total
disks=2 and both active.
The configuration is raid1 with sda and sdb, and sdb was hot-removed and
hot-added (each partition with mdadm -a).
I've included the resulting superblocks, and the syslog for the add
sequence is attached.
Is this a problem with the md driver?
Andy
# uname -a
Linux telcoraid 2.4.21-55-smp #1 SMP Wed Aug 27 19:53:48 UTC 2003 i686
unknown
# cat /proc/mdstat
Personalities : [raid1]
read_ahead 1024 sectors
md2 : active raid1 sdb2[2] sda2[1]
136448 blocks [2/1] [_U]
md1 : active raid1 sdb1[2] sda1[1]
80256 blocks [2/1] [_U]
md0 : active raid1 sdb3[2] sda3[1]
17518784 blocks [2/1] [_U]
unused devices: <none>
#
# mdadm -E /dev/sda1
/dev/sda1:
Magic : a92b4efc
Version : 00.90.00
UUID : 15e24cfe:af2ecf43:9c74fae1:7aabf6f0
Creation Time : Thu Sep 18 13:12:09 2003
Raid Level : raid1
Device Size : 80256 (78.38 MiB 82.18 MB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 1
Update Time : Mon Sep 22 12:58:41 2003
State : dirty, no-errors
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Checksum : 43828e3 - correct
Events : 0.28
Number Major Minor RaidDevice State
this 1 8 1 1 active sync /dev/sda1
0 0 0 0 0 faulty removed
1 1 8 1 1 active sync /dev/sda1
/dev/sdb1:
Magic : a92b4efc
Version : 00.90.00
UUID : 15e24cfe:af2ecf43:9c74fae1:7aabf6f0
Creation Time : Thu Sep 18 13:12:09 2003
Raid Level : raid1
Device Size : 80256 (78.38 MiB 82.18 MB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 1
Update Time : Mon Sep 22 09:37:09 2003
State : dirty, no-errors
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : 437fa2f - correct
Events : 0.25
Number Major Minor RaidDevice State
this 0 8 17 0 active sync /dev/sdb1
0 0 8 17 0 active sync /dev/sdb1
1 1 8 1 1 active sync /dev/sda1
/dev/sda2:
Magic : a92b4efc
Version : 00.90.00
UUID : 16df7960:13fe43ac:ac0cc4ba:42690535
Creation Time : Thu Sep 18 13:12:56 2003
Raid Level : raid1
Device Size : 136448 (133.25 MiB 139.72 MB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 2
Update Time : Mon Sep 22 12:58:41 2003
State : dirty, no-errors
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Checksum : 415a7d7f - correct
Events : 0.30
Number Major Minor RaidDevice State
this 1 8 2 1 active sync /dev/sda2
0 0 0 0 0 faulty removed
1 1 8 2 1 active sync /dev/sda2
/dev/sdb2:
Magic : a92b4efc
Version : 00.90.00
UUID : 16df7960:13fe43ac:ac0cc4ba:42690535
Creation Time : Thu Sep 18 13:12:56 2003
Raid Level : raid1
Device Size : 136448 (133.25 MiB 139.72 MB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 2
Update Time : Mon Sep 22 09:37:09 2003
State : dirty, no-errors
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : 415a4ecc - correct
Events : 0.27
Number Major Minor RaidDevice State
this 0 8 18 0 active sync /dev/sdb2
0 0 8 18 0 active sync /dev/sdb2
1 1 8 2 1 active sync /dev/sda2
/dev/sda3:
Magic : a92b4efc
Version : 00.90.00
UUID : 31b4390a:af5afa82:44c73f24:a2a36931
Creation Time : Thu Sep 18 13:13:12 2003
Raid Level : raid1
Device Size : 17518784 (16.71 GiB 17.94 GB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 0
Update Time : Mon Sep 22 12:58:40 2003
State : dirty, no-errors
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Checksum : f18a0e32 - correct
Events : 0.28
Number Major Minor RaidDevice State
this 1 8 3 1 active sync /dev/sda3
0 0 0 0 0 faulty removed
1 1 8 3 1 active sync /dev/sda3
/dev/sdb3:
Magic : a92b4efc
Version : 00.90.00
UUID : 31b4390a:af5afa82:44c73f24:a2a36931
Creation Time : Thu Sep 18 13:13:12 2003
Raid Level : raid1
Device Size : 17518784 (16.71 GiB 17.94 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Update Time : Mon Sep 22 09:37:08 2003
State : dirty, no-errors
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : f189df80 - correct
Events : 0.25
Number Major Minor RaidDevice State
this 0 8 19 0 active sync /dev/sdb3
0 0 8 19 0 active sync /dev/sdb3
1 1 8 3 1 active sync /dev/sda3
Attachment:
syslog
Description: syslog
