DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01
July 2004
4-119
Figure 4-77.
WRITE (0Ah) Command Descriptor Block — Data Format
The tape drive flushes the write buffer to medium under the following conditions:
•
The write hold-off time limit is exceeded. (See
“MODE SELECT (15h/55h)” on page 4-44
)
•
Receipt of the following non-write commands:
LOAD / UNLOAD
REWIND
ERASE
LOCATE
MOVE MEDIUM
PREVENT/ALLOW MEDIUM REMOVAL that clears a prevent state.
•
A WRITE FILEMARKS command with the Immediate bit cleared
•
A SCSI Reset or BUS DEVICE RESET message is received.
If Buffered Mode is not selected, the buffer flushes after every write-type command. This causes
significant degradation in performance to the transfer rate.
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (0Ah)
1
Logical Unit Number
Reserved
Fixed
2 - 4
(MSB)
Transfer Length
(LSB)
5
Unused
Reserved
Flag
Link
Table 4-70.
WRITE (0Ah) Command Descriptor Block — Field Descriptions
Field Name
Description
LUN
Logical Unit Number. The target ignores this field. Only an IDENTIFY message
can change the LUN.
Summary of Contents for DLT1/VS80 SCSI
Page 1: ...DLT1 VS80 SCSI Interface Guide...
Page 6: ...DLT1 VS80 SCSI Interface Guide vi July 2004 81 81276 01 Rev A01 Notes...
Page 12: ...Table of Contents xii July 2004 81 81276 01 Rev A01 Notes...
Page 16: ...List of Figures xiv July 2004 81 81276 01 Rev A01 Notes...
Page 20: ...List of Tables xviii July 2004 81 81276 01 Rev A01 Notes...
Page 24: ...Chapter 1 Introduction 1 4 July 2004 81 81276 01 Rev A01 Notes...
Page 32: ...Chapter 2 General SCSI Bus Operation 2 8 July 2004 81 81276 01 Rev A01 Notes...
Page 42: ...Chapter 3 SCSI Messages 3 10 July 2004 81 81276 01 Rev A01 Notes...
Page 181: ......
