Raid 10, mdadm, mdadm-raid problem
I've been having an enjoyable time tinkering with software raid with
Sarge and the RC2 installer. The system boots fine with Raid 1 for
/boot and Raid 5 for /. I decided to experiment with Raid 10 for /opt
since there's nothing there to destroy :). Using mdadm to create a Raid
0 array from two Raid 1 arrays was simple enough, but getting the Raid
10 array activated at boot isn't working well. I used update-rc.d to
add the symlinks to mdadm-raid using the defaults, but the Raid 10 array
isn't assembled at boot time. After getting kicked to a root shell, if
I check /proc/mdstat only md1 (/) is started. After running mdadm-raid
start, md0 (/boot), md2, and md3 start. If I run mdadm-raid start again
md4 (/opt) starts. Fsck'ing the newly assembled arrays before
successfully issuing 'mount -a' shows no filesystem errors. I'm at a
loss and haven't found any similar issue mentions on this list or the
linux-raid list. Here's mdadm.conf:
DEVICE partitions
DEVICE /dev/md*
ARRAY /dev/md4 level=raid0 num-devices=2
UUID=bf3456d3:2af15cc9:18d816bf:d630c183
devices=/dev/md2,/dev/md3
ARRAY /dev/md3 level=raid1 num-devices=2
UUID=a51da14e:41eb27ad:b6eefb94:21fcdc95
devices=/dev/sdb5,/dev/sde5
ARRAY /dev/md2 level=raid1 num-devices=2
UUID=ac25a75b:3437d397:c00f83a3:71ea45de
devices=/dev/sda5,/dev/sdc5
ARRAY /dev/md1 level=raid5 num-devices=4 spares=1
UUID=efec4ae2:1e74d648:85582946:feb98f0c
devices=/dev/sda3,/dev/sdb3,/dev/sdc3,/dev/sde3,/dev/sdd3
ARRAY /dev/md0 level=raid1 num-devices=4 spares=1
UUID=04209b62:6e46b584:06ec149f:97128bfb
devices=/dev/sda1,/dev/sdb1,/dev/sdc1,/dev/sde1,/dev/sdd1
Roger
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