SCSI Commands
5-150
Quantum DLT 8000 Tape System
PERSISTENT RESERVATION OUT Command (5Fh) (continued)
Table 5–67 PERSISTENT RESERVATION OUT Command’s Service Action
Descriptions
Code
Name
Description
00h
Register
When the command executes a Register service action, it registers a
reservation key with a device server without generating a reservation. The
device server holds these reservation keys from each initiator that performs a
PERSISTENT RESERVATION OUT command with a Register service action until
the key is changed by a new PERSISTENT RESERVATION OUT command with
Register service action from the same initiator, or until the initiator registration
is removed by:
•
Powering down the logical unit, if the last Activate Persist Through Power
Loss (APTPL; see Figure 5-69 and Table 5-69) received by the device server
was 0;
•
Performing a Clear service action;
•
Performing a Pre-empt service action;
•
Performing a Pre-empt and Clear service action; or
•
Performing a Register service action from the same initiator with the value
of the service action reservation key set to 0.
When a reservation key has not yet been established or when the reservation
key has been removed, a reservation key of 0 is used when the initiator
performs a PERSISTENT RESERVATION OUT with the Register service action.
When the reservation has been removed, no information is reported for the
initiator in the Read Keys service action of the resulting PERSISTENT
RESERVATION IN command..
01h
Reserve
A PERSISTENT RESERVATION OUT command with Reserve service action creates
a persistent reservation with a specified Scope and Type.
Persistent reservations are not superseded by a new persistent reservation
from any initiator except by the execution of a PERSISTENT RESERVATION OUT
command that specifies either a Pre-empt or Pre-empt and Clear service
action. New persistent reservations that do not conflict with an existing
persistent reservation execute normally. Persistent reservations of logical units
or extents having the same Type value are permitted if no conflicting
persistent reservations are held by another initiator. When these types of
overlapping reservations are released, each of the extent reservations and
logical unit reservations are removed with a separate Release service action.
Multiple identical reservations from the same initiator are all released
simultaneously via a single Release service action that matches the
reservations.
(continued)
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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