Problems generating a raid0 device

Subject: Problems generating a raid0 device
From: Alexander Holst (holst@fh-pforzheim.de)
Date: Mon Oct 22 2001 - 03:35:05 MDT

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Hi everybody,

I am experiencing trouble in making a raid0 device with two of my drives.
Running mkraid /dev/md0 gives the following output:

handling MD device /dev/md0
analyzing super-block
disk 0: /dev/hdc2, 2062335kB, raid superblock at 2062208kB
disk 1: /dev/hda9, 2332550kB, raid superblock at 2332480kB
mkraid: aborted, see the syslog and /proc/mdstat for potential clues

/proc/mdstat looks like:

Personalities :
read_ahead not set
md0 : inactive
md1 : inactive
md2 : inactive
md3 : inactive

The last lines in /var/log/messages were:

Oct 22 00:56:15 eternie-d PAM_pwdb[1396]: (netatalk) session opened for
user holale by (uid=0)
Oct 22 00:56:15 eternie-d afpd[1396]: login holale (uid 500, gid 500)
Oct 22 01:00:00 eternie-d CROND[1414]: (root) CMD ( /sbin/rmmod -as)
Oct 22 01:01:00 eternie-d CROND[1417]: (root) CMD (run-parts /etc/cron.hourly)
Oct 22 01:03:29 eternie-d modprobe: modprobe: Can't locate module block-major-8
Oct 22 01:03:29 eternie-d modprobe: modprobe: Can't locate module
block-major-33
Oct 22 01:03:29 eternie-d modprobe: modprobe: Can't locate module
block-major-33
Oct 22 01:03:29 eternie-d modprobe: modprobe: Can't locate module
block-major-34
Oct 22 01:03:29 eternie-d modprobe: modprobe: Can't locate module
block-major-34
Oct 22 01:03:29 eternie-d modprobe: modprobe: Can't locate module
block-major-11

The /etc/raidtab file looks like:

# Sample raid-0 configuration
raiddev /dev/md0
raid-level 0 # it's not obvious but this *must* be
                             # right after raiddev
persistent-superblock 1 # set this to 1 if you want autostart,
                             # BUT SETTING TO 1 WILL DESTROY PREVIOUS
                             # CONTENTS if this is a RAID0 array created
                             # by older raidtools (0.40-0.51) or mdtools!
chunk-size 64
nr-raid-disks 2
nr-spare-disks 0
device /dev/hdc2
raid-disk 0
device /dev/hda9
raid-disk 1

Anyone got some clues? What am I missing here? The installation is a YDL2.0
Home/Office with the default kernel. According to /proc/mdstat, md support
is enabled in the kernel - modprobe complains about missing modules, but
all the neccessary raidX.o files are in my modules directory.

Any help appreciated.

Alexander Holst
SysAdmin MacLabor Visuelle Kommunikation
Pforzheim University of Applied Sciences
Germany
ph.: +49 [0]7231 28-6837
fx.: +49 [0]7231 28-6040
<holst@fh-pforzheim.de>

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