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SCSI Commands
5-134
Quantum DLT 8000 Tape System
PERSISTENT RESERVATION IN Command (5Eh) (continued)
Table 5–60 PERSISTENT RESERVATION IN Command — Field Descriptions
Data Field
Description
Service Action
Service actions that require information about persistent reservation and
registrations may require enabling of nonvolatile memory within the logical
unit.
Service action codes available are:
Code
Name
Description
00h
Read Keys
Reads all registered Reservation keys
01h
Read Reservations Reads all current persistent reservations
02 – 1Fh Reserved
Reserved
A “Read Keys” service action requests that the device server return a
parameter list that includes a header and a complete list of all of the
reservation keys currently registered with the device server. If multiple
initiators have registered with the same key, then the key is listed multiple
times, once for each registration. Refer to Figure 5-65 and Table 5-61 for
information about Read Keys parameter data.
A “Read Reservation” service action requests that the device server return a
parameter list that contains a header and a complete list of all persistent
reservations that are presently active in the device server and its extents.
Note that duplicate persistent reservations from the same initiator are not
reported. Refer to Figure 5-66 and Table 5-62 for information about Read
Reservations parameter data.
Allocation
Length
This field indicates how much space has been reserved for the returned
parameter list (Read Keys or Read Reservations parameters). The actual
length of the parameter data is indicated in the parameter data field for
those parameters.
If the Allocation Length is not sufficient to contain the entire list of
parameters, the first portion of the list that does fit is returned. If it is
determined that the remainder of the list is required, the client should send
a new PERSISTENT RESERVATION IN command with an Allocation Length
field large enough to contain the entire list of parameters.
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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