Maxtor 10K III manual Persistent Reservation Type Codes and Their Meanings

		SCSI Description
		Persistent Reservation Type Codes and Their Meanings
		READS: Shared; any application client on any initiator may execute com-
		mands that perform transfers from the disk to the initiator.
		WRITES: Prohibited; any command from any initiator that performs a
%QFG0h	READ0COGShared	transfer from the initiator to the&GUETKRVKQPdisk results in a reservation conflict.
		ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the log-
		ical unit, extents, or elements as long as the persistent reservations do not
		conflict with any reservations already known to the device server.
		READS: Shared; any application client on any initiator may execute com-
		mands that perform transfers from the disk to the initiator.
		WRITES: Exclusive; any command from any initiator other than the initia-
	WRITE	tor that holds the persistent reservation that attempts a transfer to the
1h		disk results in a reservation conflict
	Exclusive
		ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the log-
		ical unit, extents, or elements as long as the persistent reservations do not
		conflict with any reservations already known to the device server.
		READS: Exclusive; any command from any initiator other than the initiator
		that holds the persistent reservation that attempts a transfer from the disk
		results in a reservation conflict
2h	READExclusive	WRITES: Shared; any application client on any initiator may execute com-
	Table5-116mands that perform transfers to the disk from the initiator.
		ADDITIONAL RESERVATIONS: Allowed; any initiator may reserve the log-
		ical unit, extents, or elements as long as the persistent reservations do not
		conflict with any reservations already known to the device server.
		READS: Exclusive; any command from any initiator other than the initiator
		holding the persistent reservation that attempts a transfer from the disk
		results in a reservation conflict.
		WRITES: Exclusive; any command from any initiator other than the initia-
		tor holding the persistent reservation that attempts a transfer to the disk
3h	Exclusive	results in a reservation conflict.
	Access	ADDITIONAL RESERVATIONS: Restricted; any PERSISTENT RESERVA-
		TION OUT command with the Reserve service action from any initiator
		other than the initiator holding the persistent reservation results in a res-
		ervation conflict. The initiator that holds the persistent reservation can re-
		serve the logical unit, extents, or elements as long as the persistent
		reservations do not conflict with any reservations already known to the
		device server.
		READS: Shared; any application client on any initiator may execute com-
		mands that perform transfers from the disk to the initiator.
		WRITES: Shared; any application client on any initiator may execute com-
		mands that perform transfers to the disk from the initiator.
4h	Shared Access	ADDITIONAL RESERVATIONS: Restricted; any PERSISTENT RESERVA-
		TION OUT command with the Reserve service action from any initiator
		other than the initiator holding the persistent reservation results in a res-
		ervation conflict. The initiator that holds the persistent reservation can re-
		serve the logical unit, extents, or elements as long as the persistent
		reservations do not conflict with any reservations already known to the
		device server.

Maxtor Atlas 10K III 5-93