HP 1900ux - Manual (Page 25)

Operations
25 HP StorageWorks 1000ux/1900ux/2300ux Optical Jukebox User’s Guide
■ Some of the front panel tests will work differently and have different initial
requirements in a mixed media unit. For example, the
DRIVE IO test will
require disks of both types in the unit and will only be able to load disks into
drives of the same type.
■ MO drives can only accept a SCSI address from 0 to 7.