Hi all,
A RAID5 array of 14 disks failed to be assembled with command mdadm -A
-f -s, but everything is well before system reboot.
Log in /var/log/dmesg
md: md0 stopped.
md: bind<sdq>
md: bind<sdm>
md: bind<sde>
md: bind<sdg>
md: bind<sdc>
md: bind<sdb>
md: bind<sdh>
md: bind<sdf>
md: bind<sdd>
md: bind<sdl>
md: bind<sdk>
md: bind<sdp>
md: bind<sdi>
md: bind<sdn>
md: bind<sdj>
md: bind<sdo>
async_tx: api initialized (async)
xor: automatically using best checksumming function: generic_sse
generic_sse: 14476.000 MB/sec
xor: using function: generic_sse (14476.000 MB/sec)
raid6: int64x1 3917 MB/s
raid6: int64x2 4234 MB/s
raid6: int64x4 3507 MB/s
raid6: int64x8 2855 MB/s
raid6: sse2x1 8937 MB/s
raid6: sse2x2 10960 MB/s
raid6: sse2x4 13027 MB/s
raid6: using algorithm sse2x4 (13027 MB/s)
md: raid6 personality registered for level 6
md: raid5 personality registered for level 5
md: raid4 personality registered for level 4
raid5: device sdo operational as raid disk 0
raid5: device sdi operational as raid disk 13
raid5: device sdp operational as raid disk 12
raid5: device sdk operational as raid disk 11
raid5: device sdl operational as raid disk 10
raid5: device sdd operational as raid disk 9
raid5: device sdf operational as raid disk 8
raid5: device sdh operational as raid disk 7
raid5: device sdb operational as raid disk 6
raid5: device sdc operational as raid disk 5
raid5: device sdg operational as raid disk 4
raid5: device sde operational as raid disk 3
raid5: device sdm operational as raid disk 2
raid5: device sdq operational as raid disk 1
raid5: allocated 14802kB for md0
0: w=1 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
13: w=2 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
12: w=3 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
11: w=4 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
10: w=5 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
9: w=6 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
8: w=7 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
7: w=8 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
6: w=9 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
5: w=10 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
4: w=11 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
3: w=12 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
2: w=13 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
1: w=14 pa=0 pr=14 m=1 a=2 r=14 op1=0 op2=0
raid5: raid level 5 set md0 active with 14 out of 14 devices, algorithm 2
RAID5 conf printout:
--- rd:14 wd:14
disk 0, o:1, dev:sdo
disk 1, o:1, dev:sdq
disk 2, o:1, dev:sdm
disk 3, o:1, dev:sde
disk 4, o:1, dev:sdg
disk 5, o:1, dev:sdc
disk 6, o:1, dev:sdb
disk 7, o:1, dev:sdh
disk 8, o:1, dev:sdf
disk 9, o:1, dev:sdd
disk 10, o:1, dev:sdl
disk 11, o:1, dev:sdk
disk 12, o:1, dev:sdp
disk 13, o:1, dev:sdi
md0: invalid bitmap file superblock: bad magic
md0: bitmap file superblock:
magic: fe7dba0d
version: -365720891
uuid: 9eab97d7.9147f31f.bdd1efdc.51fc0233
events: 44011
events cleared: 44011
state: d11bd8fb
chunksize: -1058286870 B
daemon sleep: 5s
sync size: 78776200384467208 KB
max write behind: 0
md0: failed to create bitmap (-22)
All the disks' bitmap are corrupted.
# mdadm -X /dev/sdm
Filename : /dev/sdm
Magic : fe7dba0d
mdadm: invalid bitmap magic 0xfe7dba0d, the bitmap file appears to be corrupted
Version : -365720891
mdadm: unknown bitmap version -365720891, either the bitmap file is
corrupted or you need to upgrade your tools
# mdadm -X /dev/sdp
Filename : /dev/sdp
Magic : fe7dba0d
mdadm: invalid bitmap magic 0xfe7dba0d, the bitmap file appears to be corrupted
Version : -365720891
mdadm: unknown bitmap version -365720891, either the bitmap file is
corrupted or you need to upgrade your tools
I have encounter this problem twice, but it's difficult to reappear.
Can anyone help me to resolve this problem？Thank you very much.
# uname -r
2.6.32-71.el6.x86_64
# mdadm --version
mdadm - v3.2.2 - 17th June 2011
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
