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RAID set not starting properly (solved maybe)

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Bigun
Advocate

Joined: 21 Sep 2003
Posts: 2196

Posted: Sun Jan 13, 2013 3:49 pm Post subject: RAID set not starting properly (solved maybe)

I have a raid set md127, consisting of sda1, sdb1, and sdc1.

Upon boot, mdstat:

Code:

Personalities : [raid1] [raid6] [raid5] [raid4]
md123 : inactive sdc1[3](S) sdb1[1](S)
2930269954 blocks super 1.2

md127 : inactive sda1[0](S)
1465134977 blocks super 1.2

md124 : active raid1 sde1[1] sdd1[0]
96256 blocks [2/2] [UU]

md125 : active raid1 sde2[1] sdd2[0]
979840 blocks [2/2] [UU]

md126 : active raid1 sde3[1] sdd3[0]
77074304 blocks [2/2] [UU]

unused devices: <none>

I then stop md123 and md127, then run mdadm --scan --assemble.

Code:

bigun # mdadm --assemble --scan
mdadm: /dev/md/127 has been started with 3 drives.

Then everything is fine.

Code:

Personalities : [raid1] [raid6] [raid5] [raid4]
md127 : active raid5 sda1[0] sdc1[3] sdb1[1]
2930269184 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]

md124 : active raid1 sde1[1] sdd1[0]
96256 blocks [2/2] [UU]

md125 : active raid1 sde2[1] sdd2[0]
979840 blocks [2/2] [UU]

md126 : active raid1 sde3[1] sdd3[0]
77074304 blocks [2/2] [UU]

unused devices: <none>

How do I fix this so that it starts proper upon reboot?
_________________
"It's ok, they might have guns but we have flowers." - Perpetual Victim

Last edited by Bigun on Tue Jan 15, 2013 10:03 am; edited 1 time in total

slis
Retired Dev

Joined: 11 Oct 2010
Posts: 67
Location: Limanowa

Posted: Mon Jan 14, 2013 11:20 am Post subject:

Can you show:

Code:

dmesg | grep md

Bigun
Advocate

Joined: 21 Sep 2003
Posts: 2196

Posted: Mon Jan 14, 2013 11:59 pm Post subject:

Code:

# dmesg | grep md
[ 0.000000] Kernel command line: root=/dev/md126
[ 0.489917] md: raid1 personality registered for level 1
[ 0.489989] md: raid6 personality registered for level 6
[ 0.490060] md: raid5 personality registered for level 5
[ 0.490132] md: raid4 personality registered for level 4
[ 4.925019] md: Waiting for all devices to be available before autodetect
[ 4.925093] md: If you don't use raid, use raid=noautodetect
[ 4.925333] md: Autodetecting RAID arrays.
[ 4.944264] md: invalid raid superblock magic on sda1
[ 4.944349] md: sda1 does not have a valid v0.90 superblock, not importing!
[ 4.983419] md: invalid raid superblock magic on sdb1
[ 4.983503] md: sdb1 does not have a valid v0.90 superblock, not importing!
[ 5.011379] md: invalid raid superblock magic on sdc1
[ 5.011463] md: sdc1 does not have a valid v0.90 superblock, not importing!
[ 5.089528] md: Scanned 9 and added 6 devices.
[ 5.089610] md: autorun ...
[ 5.089677] md: considering sde3 ...
[ 5.089751] md: adding sde3 ...
[ 5.089821] md: sde2 has different UUID to sde3
[ 5.089891] md: sde1 has different UUID to sde3
[ 5.089963] md: adding sdd3 ...
[ 5.090031] md: sdd2 has different UUID to sde3
[ 5.090101] md: sdd1 has different UUID to sde3
[ 5.090444] md: created md126
[ 5.090514] md: bind<sdd3>
[ 5.090589] md: bind<sde3>
[ 5.090661] md: running: <sde3><sdd3>
[ 5.091030] md/raid1:md126: active with 2 out of 2 mirrors
[ 5.091114] md126: detected capacity change from 0 to 78924087296
[ 5.091271] md: considering sde2 ...
[ 5.091341] md: adding sde2 ...
[ 5.091410] md: sde1 has different UUID to sde2
[ 5.091481] md: adding sdd2 ...
[ 5.091550] md: sdd1 has different UUID to sde2
[ 5.091739] md: created md125
[ 5.091806] md: bind<sdd2>
[ 5.091879] md: bind<sde2>
[ 5.091951] md: running: <sde2><sdd2>
[ 5.092208] md/raid1:md125: active with 2 out of 2 mirrors
[ 5.092289] md125: detected capacity change from 0 to 1003356160
[ 5.092389] md: considering sde1 ...
[ 5.092459] md: adding sde1 ...
[ 5.092528] md: adding sdd1 ...
[ 5.092701] md: created md124
[ 5.092776] md: bind<sdd1>
[ 5.092848] md: bind<sde1>
[ 5.092921] md: running: <sde1><sdd1>
[ 5.093146] md/raid1:md124: active with 2 out of 2 mirrors
[ 5.093227] md124: detected capacity change from 0 to 98566144
[ 5.093325] md: ... autorun DONE.
[ 5.123642] md126: unknown partition table
[ 5.166284] UDF-fs: warning (device md126): udf_fill_super: No partition found (1)
[ 5.204372] XFS (md126): Mounting Filesystem
[ 5.384509] XFS (md126): Ending clean mount
[ 8.336987] md124: unknown partition table
[ 8.500379] md125: unknown partition table
[ 8.546523] md: bind<sda1>
[ 8.548516] md: bind<sdb1>
[ 8.550144] md: bind<sdc1>
[ 10.032886] Adding 979836k swap on /dev/md125. Priority:-1 extents:1 across:979836k
[ 10.054665] XFS (md127): SB buffer read failed
[ 359.440817] md: md127 stopped.
[ 359.440823] md: unbind<sda1>
[ 359.442966] md: export_rdev(sda1)
[ 361.525674] md: md123 stopped.
[ 361.525681] md: unbind<sdc1>
[ 361.531852] md: export_rdev(sdc1)
[ 361.531900] md: unbind<sdb1>
[ 361.536847] md: export_rdev(sdb1)
[ 365.762656] md: md127 stopped.
[ 365.763364] md: bind<sdb1>
[ 365.763898] md: bind<sdc1>
[ 365.764020] md: bind<sda1>
[ 365.765414] md/raid:md127: device sda1 operational as raid disk 0
[ 365.765417] md/raid:md127: device sdc1 operational as raid disk 2
[ 365.765418] md/raid:md127: device sdb1 operational as raid disk 1
[ 365.765656] md/raid:md127: allocated 3190kB
[ 365.765839] md/raid:md127: raid level 5 active with 3 out of 3 devices, algorithm 2
[ 365.765865] md127: detected capacity change from 0 to 3000595644416
[ 365.766131] md127: unknown partition table
[ 1234.385072] XFS (md127): Mounting Filesystem
[ 1234.588983] XFS (md127): Ending clean mount
[ 3672.304261] XFS (md127): Mounting Filesystem
[ 3672.446578] XFS (md127): Ending clean mount

Also pastebin'd all dmesg output.

Looks like udev is setting up that raid.
_________________
"It's ok, they might have guns but we have flowers." - Perpetual Victim

s4e8
Guru
Guru

Joined: 29 Jul 2006
Posts: 311

Posted: Tue Jan 15, 2013 5:52 am Post subject:

Out of topic, you should select HIGHMEM64G because you have 8G RAM.

Bigun
Advocate

Joined: 21 Sep 2003
Posts: 2196

Posted: Tue Jan 15, 2013 10:01 am Post subject:

s4e8 wrote:

Out of topic, you should select HIGHMEM64G because you have 8G RAM.

Thanks for the sweet tip, I thought the limitation was a 32-bit thing? I thought only 64-bit could handle registers that high.

(Last OT post I swear)
_________________
"It's ok, they might have guns but we have flowers." - Perpetual Victim

Last edited by Bigun on Tue Jan 15, 2013 10:02 am; edited 1 time in total

Bigun
Advocate

Joined: 21 Sep 2003
Posts: 2196

Posted: Tue Jan 15, 2013 10:02 am Post subject:

Oddly enough, when I rebooted:

Code:

$ cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md127 : active raid5 sdc1[3] sdb1[1] sda1[0]
2930269184 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]

md124 : active raid1 sde1[1] sdd1[0]
96256 blocks [2/2] [UU]

md125 : active raid1 sde2[1] sdd2[0]
979840 blocks [2/2] [UU]

md126 : active raid1 sde3[1] sdd3[0]
77074304 blocks [2/2] [UU]

unused devices: <none>

I'm going to mark the thread as solved until I see this behavior again.
_________________
"It's ok, they might have guns but we have flowers." - Perpetual Victim

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