On Sat, 2007-04-28 at 21:48 +0800, Michael Slater wrote:
Hello, i recently installed Centos 5 on a new server with a single scsii disk. After the installation, i added 2 additional disks that were once the components of a raid0 array on another server.
I get some errors and am unable to start the array
the following is an extract from dmesg output:
md: Autodetecting RAID arrays. md: could not open unknown-block(8,17). md: could not open unknown-block(8,33).
i then examined each disk in fdisk
Device Boot Start End Blocks Id System/dev/sdb1 1 17501 17921008 fd Linux raid autodetect
Device Boot Start End Blocks Id System /dev/sdc1 1 17501 17921008 fd Linux raid autodetect
I tried to re-create the array and get this: mdadm --create --verbose /dev/md0 --level=0 --raid-devices=2 /dev/sdb1 /dev/sdc1 mdadm: chunk size defaults to 64K mdadm: Cannot open /dev/sdb1: No such device or address mdadm: Cannot open /dev/sdc1: No such device or address mdadm: create aborted
yet obviously the devices are there. what else should i look at.
putting the drives back in the old server, and the array comes up with all data intact.
Any ideas ?
thanks, Michael
Are you trying to keep the data intact and move it that way to the new server ... or do you want to erase it all and just reuse the drives?