I'm probably doing something obviously wrong, but I am unable to get a
RAID array using other RAID arrays working. I have created md1, which is
a RAID-1 array using sdb2 and sdc2, and md2, which is a RAID-5 array using
sda6, sdb1, sdc2. All partitions are the same size. md3 is a linear
array, incorporating sdb3 and sdc3, as well as md1 and md2. Running
mke2fs on md3 causes the process to hang, and incapacitates the machine
(cannot login or completely reboot system). I have the listed partitions
set to auto-mount (type fd). md2 always comes up in degraded mode, and
md3 does not come up at all.
To those pondering the logic of such a configuration, I wanted to test
RAID 1 and RAID 5, while having available a partition using all of the
combined free disk space.
What am I doing wrong? I have included by /etc/raidtab below:
# RAID config file, Paul Hancock, 3/18/99
raiddev /dev/md1
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
chunk-size 4
device /dev/sdb2
raid-disk 0
device /dev/sdc2
raid-disk 1
raiddev /dev/md2
raid-level 5
nr-raid-disks 3
chunk-size 4
parity-algorithm left-symmetric
device /dev/sda6
raid-disk 0
device /dev/sdb1
raid-disk 1
device /dev/sdc1
raid-disk 2
raiddev /dev/md3
raid-level linear
persistent-superblock 1
nr-raid-disks 4
nr-spare-disks 0
chunk-size 4
device /dev/sdb3
raid-disk 0
device /dev/sdc3
raid-disk 1
device /dev/md1
raid-disk 2
device /dev/md2
raid-disk 3
Thanks in advance.
-- Paul ([EMAIL PROTECTED])
