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vt_guy
n00b
Joined: 21 Dec 2004
Posts: 66
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 Posted: Wed Jan 10, 2007 1:17 am Post subject: Raid Array will not autodetect & start properly |
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Raid array will not start during boot, only manually using mdadm.
This hardware used to work fine in my old Gentoo install but after a wipe out and rebuild no joy. Thus I believe there are no hardware issues involved.
Any ideas what I've done wrong?
Thanks, Eric
System Info:
Created a RAID5 array with mdadm:
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mdadm -C /dev/md0 -l 5 -n 4 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sde1[3] sdd1[2] sdc1[1] sdb1[0]
732587712 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
unused devices: <none>
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Added a file system, mounted fine.
Rebooted:
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dmesg
md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: bitmap version 4.39
md: Autodetecting RAID arrays.
md: autorun ...
md: considering sde1 ...
md: adding sde1 ...
md: created md0
md: bind<sde1>
md: running: <sde1>
raid5: not enough operational devices for md0 (4/4 failed)
raid5: failed to run raid set md0
md: pers->run() failed ...
md: do_md_run() returned -5
md: md0 stopped.
md: unbind<sde1>
md: export_rdev(sde1)
md: ... autorun DONE.
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If I then manually start it everything is fine:
Here is the mdadm.conf file I created by using the scan option after the initial create:
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ARRAY /dev/md0 level=raid5 num-devices=4 UUID=b5468a71:eda1953a:905aafe6:8af6747
4
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_________________
Thanks,
Eric |
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cyrillic
Watchman
Joined: 19 Feb 2003
Posts: 7313
Location: Groton, Massachusetts USA
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| Posted: Wed Jan 10, 2007 2:15 am Post subject: |
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Check the output of "fdisk -l" to see if all your RAID partitions are "type fd".
From the md:autorun output you posted, it looks like only /dev/sde1 has the correct partition type. |
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vt_guy
n00b
Joined: 21 Dec 2004
Posts: 66
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| Posted: Wed Jan 10, 2007 1:58 pm Post subject: Solved |
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Yep, figured that out this AM. 
The other 3 disks were of LVM type.
Thinking back on the old build I was possibly using raidtab and it didn't matter then.
Dooh.... Sorry for the bother.
Thanks!
_________________
Thanks,
Eric |
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