This assume the system has been configured to mount 4 disks at boot time. If it has previously been used with less than 4 removable disks see the section below.
Re-create the software RAID set (optional this erases all data) > mdadm –stop /dev/md0 > mdadm -C /dev/md0 -n 4 -l 0 /dev/hd[egik]1
Reformat the RAID disk (optional this erases all data) > formatdisk.pl -l “LABEL” /dev/md0
Log in as vlbi > mount /data/removable
Test the new drives from the vlbi account: > cd /data/removable > mkdir test > cd test
Quick test > diskspeed
Check for data rates at or above 600 Mbps.
Sometimes when the removable IDE disks are added or removed the bios reorders its internal disk ids and gets the boot disk wrong. It will complain about “No Operating System Found”