Load/Unload Command; Table 3-21 Load/Unload Command - Oracle StorageTek T10000 Reference Manual

Load/Unload Command

The Load/Unload command loads or unloads tape from the device. Any buffered
write data and filemarks are written on the tape before an unload starts.

TABLE 3-21 Load/Unload Command

Byte 7
0
1
2 (MSB)
thru
3
4
5
Parameter
Immed: Immediate
Hold
EOT: End-Of-Tape
Reten: Retention
Load
Notes:
August 2016
Caution – If the drive is in Buffered Mode and a previous
command terminated with Check Condition status (such as
buffered data unwritten to tape and the condition was not cleared
or otherwise recovered), the drive will discard any unwritten
buffered data and filemarks before this operation starts.
6 5
Operation Code (1Bh)
Reserved
Value
0 = Return status when load or unload is complete
1 = Return status when load or unload is started
Not supported
0 = Normal load/unload
0 = Tape is unloaded from BOT
0 = Do not retention the tape
1 = Retention tape (ignored)
0 = Unload the tape
1 = Load the tape
• After a load or unload operation with the Immediate bit set, a Test Unit
Ready command returns Busy status while the Load/Unload command is
still in progress.
• After a successful load operation, Good status is returned. The next
command returns a sense key of unit attention.
• If a Load command is issued when a tape is already loaded, the Load
command is ignored.
• If the drive is installed in a library, a load command to an unloaded drive is
rejected.
Bit
4 3
Reserved
Reserved
Hold
Control Byte
Load/Unload Command
2 1
Immed
EOT Reten Load
Commands 59
0
(LSB)