[First-time poster, done plenty of googling and archive searching before sending this, so if it's already been covered my apologies in advance...] Hello All- I am running a 3-disk RAID-5 using kernel 2.6.24 and mdadm 2.6.3 under Ubuntu server 8.04LTS. I'm trying to add a spare drive to the array. /dev/md0 == /dev/sdc, /dev/sdd, /dev/sda I want to add /dev/sdb1 as a spare partition, so I tried `mdadm /dev/md0 --add /dev/sdb1` ... this worked great; running `mdadm --detail /dev/md0` shows 3 active and 1 spare. Cool! However, after a reboot, I'm back to 3 active and 0 spare drives. I tried adding the spare to my DEVICES list in /etc/mdadm/mdadm.conf, and adding a SPARES=1 attribute to the ARRAY line in that file, still no persistence. I tried running `update-initramfs -u` after changing mdadm.conf (per an IRC suggestion) but still no persistence. -- Is it possible to do what I'm trying to do? -- Do I need to create the array anew using `mdadm --create` and specifying "--spare-devices=1 /dev/sdb1" during creation? -- Will creating the array again risk corrupting the data already present? -- Is there any way to instantiate a superblock on /dev/sdb1 so that it can be associated with this array's UUID? -- I have the ARRAY line (in mdadm.conf) specified by UUID; could this be causing the spare to be excluded, since it (presumably) does not have a superblock? Thanks in advance, Dave -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
