Reference Guide

Chapter 4 SCSI Commands
LOAD UNLOAD Command (1Bh)
DLT-S4 Interface Reference Guide 55
Table 30 LOAD UNLOAD
Command Descriptor Block
—
Field Descriptions
Table 31 HOLD and LOAD —
Field Descriptions
Field Description
Immed Immediate. When set to 1, the drive returns status as soon as the operation starts. When set
to 0, the drive returns status after the operation has completed.
Hold See table 31
.
EOT End of Tape. The drive ignores this bit unless both the EOT and Load bits are set to 1, then
the drive returns
CHECK CONDITION status with Sense Key set to ILLEGAL REQUEST.
ReTen Retension. Ignored. Retension operations are not needed.
Load See table 31
.
HOLD LOAD Description
0 0 The tape is unloaded and the cartridge is ejected. When the
HOLD bit is set to 0 and
the
LOAD bit is set to 0, the tape is unloaded and the cartridge is ejected.
0 1 The tape is and positioned for access. When set to 0 and the
LOAD bit is set to one,
the tape is loaded for medium access.
1 0 The tape is unloaded, but not ejected. When the HOLD bit is set to 1 and the
LOAD
bit is set to 0, the tape is unloaded from the device but not ejected to allow the
operator access to the cartridge.
1 1 The tape is seated, but not loaded. When the
HOLD bit set to 1 and the LOAD bit is
also set to 1, the tape is loaded to the point where the MAM is accessible but the
medium is not positioned for access.