Quantum 1200 Series DAT Autochanger Guía de usuario Pagina 190

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PERSISTENT RESERVE OUT Command (5Fh) SDLT 600 SCSI Interface Guide
4-148 January 2005 81-81200-02 REV A01
The following table presents the definitions of the available Type values from the Type field of the
PERSISTENT RESERVE OUT Read Reservations parameters. Each of the codes provides handling
instructions for READ operations, for WRITE operations, and for subsequent attempts to establish
persistent reservations (referred to as “Additional Reservations Allowed” in the table).
Table 4-84. PERSISTENT RESERVE OUT Type Codes
Code Name Description
0h Obsolete ---
1h WRITE
Exclusive
READS: Shared. Any application client on any initiator may
execute commands that perform transfers from the tape medium
to the initiator.
WRITES: Exclusive. Any command from any initiator other than
the initiator that holds the persistent reservation that attempts a
transfer to the tape medium results in a reservation conflict.
2h Obsolete ---
3h Exclusive
Access
READS: Exclusive. Any command from any initiator other than
the initiator holding the persistent reservation that attempts a
transfer from the tape medium results in a reservation conflict.
WRITES: Exclusive. Any command from any initiator other than
the initiator holding the persistent reservation that attempts a
transfer to the tape medium results in a reservation conflict.
4h Obsolete ---
5h WRITE
Exclusive
Registrants Only
READS: Shared. Any application client on any initiator may
execute commands that perform transfers from the tape medium
to the initiator.
WRITES: Exclusive. Any command from an initiator that has not
previously performed a Register service action with the drive that
attempts a transfer to the tape medium results in a reservation
conflict.
6h Exclusive
Access
Registrants Only
READS: Exclusive. Any command from an initiator that has not
previously performed a Register service action with the drive that
attempts a transfer from the tape medium results in a reservation
conflict.
WRITES: Exclusive. Any command from an initiator that has not
previously performed a Register service action with the drive that
attempts a transfer to the tape medium results in a reservation
conflict.
7h -
Fh
Reserved Not applicable
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