DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01
July 2004
4-3
4.3
ERASE (19h)
ERASE causes data on the medium to be erased. Before executing the ERASE command, the tape
drive flushes to medium any write data currently held in a data cache and not yet written.
Figure 4-1.
ERASE (19h) Command Descriptor Block — Data Format
WRITE
0Ah
Page 4-118
WRITE BUFFER
3Bh
Page 4-121
WRITE FILEMARK
10h
Page 4-123
Bit
Byte
7
6
5
4
3
2
1
0
0
Operaton Code (19h)
1
Logical Unit Number
Reserved
Immed
Long
2 - 4
Reserved
5
Unused
Reserved
Flag
Link
Table 4-2.
ERASE (19h) 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.
Immed
Immediate. If this bit is 0, the target does not return status until the selected
operation has completed. If the bit is 1, the target returns the status as soon as the
tape drive has initiated the operation.
Long
The Long bit controls the distance to be erased. If the bit is set, the tape drive
writes filler and EOD blocks if needed and then erases the entire rest of the
medium.
Note
: This command is a NO-OP on the tape drive unless the Long bit is set.
Issuing the ERASE command away from BOT is an ILLEGAL REQUEST.
Table 4-1.
Supported SCSI Commands
(Continued)
Command
Opcode
Section
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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