Write Buffer 3Bh - Sony DDS-4 Product Description Manual

6. COMMAND SPECIFICATION

6. 28 WRITE BUFFER 3Bh

Bit 7
Byte
0
1
2
3 (MSB)
5
6 (MSB)
8
9 Unused (00b)
WRITE BUFFER is used in conjunction with the READ BUFFER command as a diagnostic function for testing the 1
MB buffer and the SCSI bus integrity of the drive. A REWIND command should be sent to the drive after WRITE/
READ BUFFER diagnostic testing to allow normal operation.
WRITE BUFFER command is valid only when there is no tape inserted in the drive, or when the tape is positioned at
BOT. An attempt to issue the Write Buffer command when the tape is not at BOT will result in a CHECK CONDITION
status with a Request Sense Key of ILLEGAL REQUEST.
Note: The drive will write any buffered data to tape prior to executing this command. Any data that is then transferred
by the WRITE BUFFER is not written to tape.
Mode:
The drive supports the following values within the Mode field. If any other value is set, the drive will terminate the
command with a CHECK CONDITION status and an ILLEGAL REQUEST sense key set.
6 - 100 SONY SDT-10000/SDT-11000 DDS Tape Drive
6 5
Logical Unit Number
4 3
Operation Code (3Bh)
Reserved
Buffer ID
Buffer Offset
Parameter List Length
Reserved
WRITE BUFFER
2 1 0
Mode
(LSB)
(LSB)