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SCSI Commands
5-206
Quantum DLT 8000 Tape System
RESERVE (10) Command (56h) (continued)
Table 5–91 RESERVE UNIT (10) Command — Field Descriptions (continued)
Field
Description
Extent
If 0, requests that the entire logical unit be reserved for use only by the
initiator until the request is supplanted by another valid RESERVE command
from the same initiator, or until released via a RELEASE (10) command from
the reserving initiator, a hard reset, or a power on cycle.
If set = 1, the extent reservation option is implemented. This option allows
an application client in a multitasking environment to have multiple
reservations.
The size of the extent list is defined by the contents of the Parameter List
Length field. The extent list consists of zero or more descriptors. Each
descriptor defines an extent beginning at the specified logical block address
for the specified number of blocks. If the number of blocks is 0, the extent
begins at the specified logical block address and continues through the last
logical block address on the logical unit. The data format of extent
descriptors is shown in Figure 5-93.
Bit
Byte
7
6
5
4
3
2
1
0
0
Reserved
RelAdr
Reservation Type
1 - 3
(MSB)
Number of Blocks
(LSB)
4 - 7
(MSB)
Logical Block Address
(LSB)
Figure 5–93 Extent Descriptors — Data Format
Summary of Contents for DLTtape DLT 8000
Page 1: ...DLTTM 8000 Tape System Product Manual Nov 10 2003 81 60118 06...
Page 5: ...USER MANUAL STATEMENTS FOR CLASS B EQUIPMENT continued...
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Page 26: ...Table of Contents xxiv Quantum DLT 8000 Tape System...
Page 36: ...About This Manual Quantum DLT 8000 Tape System xxxii...
Page 54: ...General Description and Specifications 1 18 Quantum DLT 8000 Tape System...
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Page 376: ...Appendix A Definition of Vendor Unique Sense Data Information A 4 Quantum DLT 8000 Tape System...
Page 386: ...Appendix C Updating the Firmware C 6 Quantum DLT 8000 Tape System...
Page 396: ...Appendix E Visual Inspection Procedure for DLTtape Cartridges E 8 Quantum DLT 8000 Tape System...
Page 406: ...Appendix G DLT 7000 Emulation Feature G 8 Quantum DLT 8000 Tape System...
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