I have a RAID-6 array I'm having trouble with:
md2 : active raid6 sdl1[6] sdh1[0] sdm1[5] sdk1[3] sdj1[2] sdi1[1]
1953535488 blocks level 6, 128k chunk, algorithm 2 [6/5] [UUUU_U]
[>....................] recovery = 0.0% (27164/488383872)
finish=599.1min speed=13582K/sec
- When the system boots (or when I attempt to build the array), I get a
message that /dev/sdl and /dev/sdl1 have the same superblock, and that
I should zero one.
- So, I zero the superblock using 'mdadm --zero-superblock /dev/sdl (or
/dev/sdl1; doesn't matter which I use).
- I then re-add the device to the array (and the RAID-6 array recovers,
as above.)
- The next time I boot, I get the exact same error message.
- It doesn't seem to matter which (between the device or the partition)
that I zero the superblock on. I get the same error message at boot
(when the drive is being assembled).
- Since it's redundant data anyway, I've tried dd'ing from /dev/zero
over the drive, repartitioning the drive, and then adding the drive to
the array. Same behavior.
- My mdadm.conf just has the array itself, and the array's UUID. It
doesn't explicitly list devices.
So what am I missing? There's got to be a way I can get the array to
assemble at boot, instead of having to manually --zero-superblock every
time.
--
Troy Telford
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