DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01
July 2004
4-97
information based on the (non-diagnostic) data in its buffer as well as the data on medium.
Additionally, bytes 25 through 28 will contain the amount of medium to be written in 4 KB blocks.
REQUEST SENSE does not cause the tape drive to flush its buffered data to medium. Therefore, if the
host requires the exact physical positioning of the media, it should precede the REQUEST SENSE
with a WRITE FILEMARKS command with length 0 (Immed =0), which forces the tape drive to flush
any currently buffered data to medium. A subsequent REQUEST SENSE returns to the initiator the
actual physical (and logical) position of the tape drive.
Table 4-58.
REQUEST SENSE 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.
Allocation Length
The Allocation Length specifies the maximum number of sense bytes to be
returned. The tape drive terminates the transfer when it has transferred Allocation
Length bytes or when it has transferred all available Sense Data to the host,
whichever is less.
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...
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