Write Filemarks; Command Description; Command Descriptor Block - Tandberg Data SLR7-140 PROGRAMMER Manual

32.
BYTE BIT 7
00 Operation Code 10h
01 Logical Unit Number (LUN)
02 Number of Tapemarks
03
04
05 Control Byte
Table 32-1:
WSmk

Write Filemarks

32.1. Command Description

The WRITE FILEMARKS command causes the specified number
of tapemarks to be written beginning at the current tape
position. A zero value of tapemarks indicates that no
tapemarks are to be written. This can be used to force
any buffered write data or tapemarks to be written to
the tape.
If the WRITE FILEMARKS command is the first media access
command executed
write operation
FILEMARKS command follows an ERASE, LOAD/UNLOAD (with
Load bit set to
operation will
FILEMARKS command
another WRITE FILEMARKS command, and the tape is in an
append position, the write filemark operation will start
at the current tape position.
Upon termination
command, the logical tape position will be after the
last tapemark written (end-of-partition side).
See also the WRITE command for details on terminating
write operations.
If disconnection is allowed, the Drive will disconnect
when executing this command.

32.2. Command Descriptor Block

6 5
WRITE FILEMARKS Command Descriptor Block
A Write Setmark (WSmk) bit of one indicates that the
Write Filemarks
number of setmarks. A Write Setmark (WSmk) bit of zero
indicates that the Write Filemarks command should write
the requested number of filemarks.
32-1 Tandberg SLR Product Line SCSI Functional Specifications
on a newly inserted
will start from
one) or REWIND
also start from
follows a READ,
of a successful
4 3
RESERVED
command should
cartridge,
BOM. If the WRITE
command, the write
BOM. If the WRITE
SPACE, WRITE
WRITE FILEMARKS
2 1
WSmk IMM
write the requested
the
or
0