
Command
Operation
code
(hex)
What the CTS does
in response to this command
Described
in
MODE
SELECT
15h
Changes the CTS’s internal medium, logical unit, or
device parameters to values specified by the initiator.
Chapter
10
MODE
SENSE
1Ah
Provides the initiator with information about the CTS’s
internal medium, logical unit, and device parameters.
PREVENT/ALLOW
MEDIUM
REMOVAL
1Eh
Prevents or allows the removal of the data cartridge
from the CTS. When the PREVENT MEDIUM
REMOVAL command is in effect, the CTS’s unload
button is disabled.
Chapter
11
READ 08h
Transfers data from the tape to the initiator.
Chapter
12
READ
BLOCK LIMITS
05h
Provides the initiator with information about the
maximum and minimum logical block lengths that the
CTS can support for read and write operations in the
current operating mode.
Chapter
13
READ
BUFFER
3Ch
Copies the CTS’s microcode to the initiator. (This
command is used in conjunction with the WRITE
BUFFER command to copy one CTS’s microcode to
another CTS.)
Chapter
14
READ
POSITION
34h
Reports the current logical position of the tape to the
initiator. This allows the initiator to store the position
for later use in locating data with a LOCATE
command.
Chapter
15
RECEIVE
DIAGNOSTIC
RESULTS
1Ch
Reports the results of diagnostic tests or traces of
SCSI and servo command activity to the initiator.
Chapter
16
RELEASE
UNIT
17h
Releases the CTS from exclusive use by the initiator
that had previously reserved it with a RESERVE
UNIT command.
Chapter
17
REQUEST
SENSE
03h
Provides the initiator with sense information
describing a condition that just occurred.
Chapter
18
RESERVE
UNIT
16h
Reserves the CTS for exclusive use by the initiator
that issued the command.
Chapter
19
REWIND
01h
Rewinds the tape to the logical beginning of the tape
(LBOT) or the logical beginning of the current partition.
Chapter
20
May 1994 EXB-8205 and EXB-8505
(Standard and XL)
2-5
2 SCSI Communication
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