I am using raidtools-0.90 under linux-2.2.5 with appropriate patches applied.
My /etc/raidtab
-----------------------------------------
raiddev /dev/md0
raid-level 5
nr-raid-disks 6
nr-spare-disks 1
persistent-superblock 1
parity-algorithm left-symmetric
chunk-size 32
device /dev/sdb1
raid-disk 0
device /dev/sdc1
raid-disk 1
device /dev/sdd1
raid-disk 2
device /dev/sde1
raid-disk 3
device /dev/sdf1
raid-disk 4
device /dev/sdg1
raid-disk 5
device /dev/sdh1
spare-disk 0
--------------------------
It booted up fine. I was able to use for a while. I made a directory
x with several files amounting to around 1.0G. I tried doing
cp -a x y
I got ton load of errors like /dev/md0 I/O error. syslog went on writing
the same message into /var/log/messages. Finally I had to power cycle
and rebuild the entire array. Anybody knows, what is happening?
So finally I decided against putting our users on this array for now.
However, I am impressed enough to use this or lvm once the
code gets stable. I'll be watching with interest.
Ramana