Hello,
We are having some problems with our RAID 5 array.
We have a PC using the Promise ATA133 controller running a 4 x 160Gb disk RAID
5 array. The promise bios is set to striping and our raidtab file looks like:
# raiddev configuration file
raiddev /dev/md0
raid-level 5
nr-raid-disks 4
nr-spare-disks 0
persistent-superblock 1
chunk-size 16K
parity-algorithm left-symmetric
device /dev/sda
raid-disk 0
device /dev/sdb
raid-disk 1
device /dev/sdc
raid-disk 2
device /dev/sdd
raid-disk 3
Before we use the system to store real data we would like to test it and
ensure that we can rebuild the array if a disk fails.
To simulate disk failure we shut the machine down and then unplug one of the
160 Gb drives, we then reboot the machine and the array come back up with 3
out of the four disks working, great!, but we cannot add a new disk into the
array (This is the unplugged disk re-formated with an fd file system). We
have tried using
mkraid --upgrade --configfile raid.promise /dev/md0
and then,
raidhotadd --configfile raid.promise /dev/md0 /dev/sda,
but it does not work. Could we be having problems because we are using
striping in the promise bios?
Thanks,
Wes.
-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
