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SCSI Commands

Quantum DLT 8000 Tape System 5-143

PERSISTENT RESERVATION IN Command (5Eh) (continued)

Table 5–64 Persistent Reservation Type Codes and Their Meanings (continued)

Code Name Description

5h WRITE Exclusive,

Registrants Only

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 an initiator that has not previously

performed a Register service action with the device server 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 to not conflict with any

reservations already known to the device

server.

6h Exclusive Access,

Registrants Only

READS: Exclusive; any command from an initiator that has not previously

performed a Register service action with the device server that

attempts a transfer from the target results in a reservation conflict.

WRITES: Exclusive; any command from an initiator that has not previously

performed a Register service action with the device server 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 to not conflict with any

reservations already known to the device

server.

7h - Fh Reserved N/A

Table 5–65 represents graphically all possible combinations of Persistent Reservations

Being Attempted when Persistent Reservations are already held for each of the types of

persistent reservations.

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Quantum DLT 8000 Manual Pagina 287