Seagate STT8000A - Manual (Page 69)

ATAPI Interface Chapter 5
STT8000A Product Manual Page 61
Write Filemark command
Bit
Byte
7 6 5 4 3 2 1 0
0 Operation code (10h)
1 Reserved
2 Reserved
3 Reserved
4 Reserved Count
5 Reserved
After receiving this command, the device sets DSC (0) and returns completion
status. Any data remaining in the buffer is then written to tape (flush/ synchronize),
and if the count is 1, a Filemark is written. In any case, an EOD is then written.
The Immed bit in the command packet is ignored, and the DSC bit is reset (0) after
this command is accepted. The DSC bit is set (1) after the EOD has been
successfully written. REQUEST SENSE can then be used to verify successful
command completion.