Hi.
Last night, I upgraded from Ubuntu 6.06 to Ubuntu 6.10. I have a Linux
sw raid0 running on two drives, just using the raw devices rather than
any partitions on them. The Ubuntu 6.06 kernel would simply see the
superblocks on boot and start up the array automagically for me. The
6.10 kernel does not. I don't know if this is an Ubuntu thing, a Linux
kernel issue (2.6.17 now), or something else.
I try and start my array by hand with mdadm, and I get weird stuff.
Basically, check this out:
root@stoneburner:~# mdadm --assemble /dev/md0 /dev/hde /dev/hdi
mdadm: cannot open device /dev/hde: Device or resource busy
mdadm: /dev/hde has no superblock - assembly aborted
You'd think hde or hdi were busted. But I can do a `mdadm
-E /dev/hde /dev/hdi` just fine:
root@stoneburner:~# mdadm -E /dev/hde /dev/hdi
/dev/hde:
Magic : a92b4efc
Version : 00.90.00
UUID : dd994e72:2ceb7a88:c43ed7bf:cd2e62fb
Creation Time : Sun Feb 15 02:57:53 2004
Raid Level : raid0
Device Size : 36151808 (34.48 GiB 37.02 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 2
Update Time : Mon Aug 1 19:55:30 2005
State : active
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : ca633808 - correct
Events : 0.247
Chunk Size : 4K
Number Major Minor RaidDevice State
this 1 56 0 1 active sync /dev/hdi
0 0 33 0 0 active sync /dev/hde
1 1 56 0 1 active sync /dev/hdi
/dev/hdi:
Magic : a92b4efc
Version : 00.90.00
UUID : dd994e72:2ceb7a88:c43ed7bf:cd2e62fb
Creation Time : Sun Feb 15 02:57:53 2004
Raid Level : raid0
Device Size : 36151808 (34.48 GiB 37.02 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 2
Update Time : Mon Aug 1 19:55:30 2005
State : active
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : ca6337ef - correct
Events : 0.247
Chunk Size : 4K
Number Major Minor RaidDevice State
this 0 33 0 0 active sync /dev/hde
0 0 33 0 0 active sync /dev/hde
1 1 56 0 1 active sync /dev/hdi
It seems like it shouldn't be able to query the superblocks if the
devices are supposedly busy. Any ideas? Here is my dmesg also:
http://people.ucsc.edu/~mthrailk/edgy-dmesg
The ide startup is relatively uneventful, but what is strange is that md
starting up is very quiet. It doesn't load the raid0 module, but if I
load it by hand later, it doesn't make a difference at all with the
above commands.
I await your advice, thanks!
--
Matt Thrailkill <matt@xxxxxxxxxxxxxx>
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