Quantum SuperLoader Guida Utente Pagina 117

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Chapter 3 Media Changer Commands
Persistent Reserve In Command (5Eh)
Quantum ATL SuperLoader Software Interface Guide 99
Table 44 Persistent
Reservation 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 target 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 target results in a reservation conflict
ADDITIONAL RESERVATIONS: Allowed; any initiator may
reserve the logical unit, extents, or elements as long as the persistent
reservations do not conflict with any reservations already known to
the device server.
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 target 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 target results in a reservation conflict.
ADDITIONAL RESERVATIONS: Restricted; any PERSISTENT
RESERVE OUT command with the Reserve service action from any
initiator other than the initiator holding the persistent reservation
results in a reservation conflict. The initiator that holds the
persistent reservation can reserve the logical unit, extents, or
elements as long as the persistent reservations do not conflict with
any reservations already known to the device server.
4h Obsolete
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