Here is a good view of the SBB (Storage Building Blocks) in and out of the
disk array. Each one of these blocks holds an SCA SCSI-2 Ultra Wide disk
drive. Most of our disks are 9.1gig, however we have 3 4.3gig and
3 18.2gig). With this array and with the controller configured properly,
these units are hot swapable.