Knowledge Base - FAQ
Question: How do I add / remove a sata drive?To get the serial number of the drive in question use:
smartctl -a /dev/sdb
To fail a drive out of the array, use:
mdadm -f /dev/md0 /dev/sdb1
then
mdadm -r /dev/md0 /dev/sdb1
After replacing the bad drive,
At the device level to force a rescan on a scsi bus (each sata port appears as a scsi bus) and find new drives:
echo "0 0 0" >/sys/class/scsi_host/hostXX/scan (where XX is the bus number)
To put the new drive back into the array, use:
sfdisk -d /dev/sda | sfdisk /dev/sdb
mdadm -a /dev/md0 /dev/sdb1
Dont forget to lilo after the array has rebuilt. Using "at" can help:
# at 20:00
warning: commands will be executed using (in order) a) $SHELL b) login shell c) /bin/sh
at> lilo
at> <EOT>
job 1 at 2011-12-06 20:00
Last Modified: Dec 06, 2011