Wolfgang Denk wrote:
Hello,
I see somewhat strange reports for a RAID6 array of 6 disks:
# cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md2 : active raid6 sdc[0] sdh[6] sdg[4] sdf[3] sde[2] sdd[1]
1953545792 blocks super 1.0 level 6, 16k chunk, algorithm 2 [6/6] [UUUUUU]
...
Oops? I see disks 0, 1, 2, 3, 4, and 6 - why 6 and not 5 ?
If I check the devices, I see for example this:
# mdadm -Q --examine /dev/sdc
mdadm: metadata format 1.00 unknown, ignored.
/dev/sdc:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x0
Array UUID : ed815df1:a9df9e8e:a65e948f:17ef5557
Name : 1
Creation Time : Sat Apr 12 00:02:52 2008
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 976772896 (465.76 GiB 500.11 GB)
Array Size : 3907091584 (1863.05 GiB 2000.43 GB)
Super Offset : 976773152 sectors
State : clean
Device UUID : bc286549:0267dd3b:ce683a7c:66341111
Update Time : Mon Jan 12 13:02:52 2009
Checksum : 62b5e607 - correct
Events : 35060
Chunk Size : 16K
Array Slot : 0 (0, 1, 2, 3, 4, failed, 5)
Array State : Uuuuuu 1 failed
What does the "metadata format 1.00 unknown, ignored." mean, and how
can I fix it? And why does it report "Array State ... 1 failed"?
[This is on a standard Fedora 10 system.]
Any help welcome - thanks in advance.
I have seen similar on a system which has a drive fail and which rebuilt
on a spare. Also, check you /etc/mdadm.conf file and be sure it uses
PARTITIONS and UUID to build the array, and isn't looking for some
missing device.
Report back, if none of that helps someone else will have ideas by
then. ;-)
--
Bill Davidsen <davidsen@xxxxxxx>
"Woe unto the statesman who makes war without a reason that will still
be valid when the war is over..." Otto von Bismark
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