Chapter 4: SCSI Commands
4-68
July 2004
81-81276-01 Rev A01
4.10 MODE SENSE (1Ah/5Ah)
The MODE SENSE command allows the tape drive to report its media and current or changeable
configuration parameters to the host. It complements the MODE SELECT command.
The VS80 tape drive supports both the 6-byte and 10-byte MODE SENSE commands.
Figure 4-42.
MODE SENSE (1Ah) 6-Byte Command Descriptor Block — Data Format
The VS80 tape drive requires the 10-byte MODE SENSE command to request the Vendor Unique
EEPROM Parameter Page as a result of the large amount of data that the Vendor Unique EEPROM
Parameter Page contains. MODE SENSE (10) can retrieve the other pages as well. Note that MODE
SENSE (10) returns a different format of Descriptor data.
Figure 4-43.
MODE SENSE (5Ah) 10-Byte Command Descriptor Block — Data Format
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (1Ah)
1
Logical Unit Number
Rsv’d
DBD
Reserved
2
PC
Page Code
3
Reserved
4
Allocation Length
5
Unused
Reserved
Flag
Link
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (5Ah)
1
Logical Unit Number
Rsv’d
DBD
Reserved
2
PC
Page Code
3 - 6
Reserved
7 - 8
(MSB)
Allocation Length
(LSB)
9
Unused
Reserved
Flag
Link
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: ......
