User's Guide

72 Using the Menus
Sequential Sequential mode is used with host software applications that recognize tape
drives, but do not recognize a library media changer. In this mode, the
library (not the host application software) keeps track of the tape locations
and manages the insertion and removal of tape media to the drives. When
a backup is performed using Sequential mode, data is written to the tapes
in the order they are stored in the library.
If you are operating in Sequential mode, your library is not recognized by a
host. You must use the Command menu to start and stop this mode.
If you set your mode to Sequential, configure the sequential options. For
more information on configuring sequential options, refer to Sequential
on
page 105.
Libraries set to Sequential mode always automatically load an empty drive.
When the host gives the drive a command to unload, the library unloads the
tape and automatically puts another one into the drive. If a library that is
configured for Sequential mode is booted without a tape in a drive, a tape
loads to the drive automatically.
LUN LUN mode is used with host software applications that recognize the
Medium Changer Logical Unit presented by a tape drive with LUN-1
capability. It is the capability of a tape drive to present both a SCSI
Streaming device on Logical Unit Number 0 (LUN-0) as well as a SCSI
Medium Changer device on LUN-1, that allows an application to
communicate with and control both devices by using a single path to the
drive. This capability is independent of the physical transport layer, and
allows more than one control path to library. Fibre drives can only be set to
SEQ mode or LUN mode.
Selection Description/Result
1 From the Setup menu, highlight and
press .
Configures library operational access modes.
2 Press and to select Mode.
3 Press to move to the next field.