DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01
July 2004
4-45
.
Figure 4-28.
MODE SELECT (55h) 10-Byte Command Descriptor Block — Data Format
The tape drive always powers up with its default configurations set. This is also true if the tape drive
receives a BUS DEVICE RESET message or a hard reset through the RST line on the SCSI bus.
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (55h)
1
Logical Unit Number
PF
Reserved
SP(0)
2 - 6
Reserved
7 - 8
(MSB)
Parameter List Length
(LSB)
9
Unused
Reserved
Flag
Link
Table 4-27.
MODE SELECT (15h/55h) 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.
PF
Page Format. This bit indicates that the data the host sent after the MODE
SELECT header and block descriptors complies with the definition of pages in the
SCSI-2 specification. The SCSI-1 format is not implemented, so this bit must be
set. It is an ILLEGAL REQUEST to have page parameters while the PF bit is 0.
SP
Save Parameters. Not supported. This bit must be 0. The Save Parameters bit
instructs the tape drive to save all savable pages.
Parameter List Length
Specifies the length in bytes of the MODE SELECT parameter list that the initiator
transfers during the DATA OUT phase. A Parameter List Length of 0 indicates no
data is transferred.
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: ......
