Hints on reducing kickouts
flat view
From: John Obaterspok <hidden>
Date: 2012-03-01 18:14:38
Hello,
Occasionally my system don't shutdown cleanly and almost all time
mdadm kicks one of the disks on the RAID5 array.
Is there anything I can do to help prevent this?
I'm using sw raid 5 with 3 x 3TB Hitachi Deskstar (7K3000 HDS723030ALA640 64MB).
--------
/dev/md2:
Version : 1.2
Creation Time : Thu Jul 28 07:23:45 2011
Raid Level : raid5
Array Size : 5706313728 (5441.96 GiB 5843.27 GB)
Used Dev Size : 2853156864 (2720.98 GiB 2921.63 GB)
Raid Devices : 3
Total Devices : 3
Persistence : Superblock is persistent
Update Time : Thu Mar 1 18:59:21 2012
State : clean, degraded, recovering
Active Devices : 2
Working Devices : 3
Failed Devices : 0
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 512K
Rebuild Status : 14% complete
Name : Emperor:2 (local to host Emperor)
UUID : a9f823df:05acab4f:1b02cfb9:70173894
Events : 792
Number Major Minor RaidDevice State
0 8 3 0 active sync /dev/sda3
4 8 19 1 spare rebuilding /dev/sdb3
3 8 35 2 active sync /dev/sdc3
--------
/dev/sda3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : a9f823df:05acab4f:1b02cfb9:70173894
Name : Emperor:2 (local to host Emperor)
Creation Time : Thu Jul 28 07:23:45 2011
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 5706314639 (2720.98 GiB 2921.63 GB)
Array Size : 11412627456 (5441.96 GiB 5843.27 GB)
Used Dev Size : 5706313728 (2720.98 GiB 2921.63 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : clean
Device UUID : abafe531:af25e9ab:54bba541:775a1c11
Update Time : Thu Mar 1 19:11:53 2012
Checksum : 3b777715 - correct
Events : 794
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAA ('A' == active, '.' == missing)
/dev/sdb3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x2
Array UUID : a9f823df:05acab4f:1b02cfb9:70173894
Name : Emperor:2 (local to host Emperor)
Creation Time : Thu Jul 28 07:23:45 2011
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 5706314639 (2720.98 GiB 2921.63 GB)
Array Size : 11412627456 (5441.96 GiB 5843.27 GB)
Used Dev Size : 5706313728 (2720.98 GiB 2921.63 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Recovery Offset : 713289232 sectors
State : clean
Device UUID : adefab73:b8a595de:666a951b:41513425
Update Time : Thu Mar 1 19:11:53 2012
Checksum : c875cb12 - correct
Events : 794
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAA ('A' == active, '.' == missing)
/dev/sdc3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : a9f823df:05acab4f:1b02cfb9:70173894
Name : Emperor:2 (local to host Emperor)
Creation Time : Thu Jul 28 07:23:45 2011
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 5706314639 (2720.98 GiB 2921.63 GB)
Array Size : 11412627456 (5441.96 GiB 5843.27 GB)
Used Dev Size : 5706313728 (2720.98 GiB 2921.63 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 9d3685e5:cbc37737:d8b864e4:452a5718
Update Time : Thu Mar 1 19:11:53 2012
Checksum : 249f6979 - correct
Events : 794
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAA ('A' == active, '.' == missing)
---------
--john