Seagate SCSI Interface Product Manual page 171

SCSI Interface Product Manual, Rev. J
Table 113: Persistent Reservation Type Codes
Code Name
00h Read
Shared
01h Write
Exclusive
02h Read
Exclusive
03h Exclusive
Access
04h Shared
Access
05h Write
Exclusive,
Registrants
Only
06h Exclusive
Access,
Registrants
Only
07h-1Fh Reserved
Description
Reads Shared: Any application client on any initiator may execute commands
that perform transfers from the storage medium or cache of the logical unit to
the initiator.
Writes Prohibited: Any command from any initiator that performs a transfer
from the initiator to the storage medium or cache of the logical unit shall result
in a reservation conflict.
Reads Shared: Any application client on any initiator may execute commands
that perform transfers from the storage medium or cache of the logical unit to
the initiator.
Writes Exclusive: Any command from any initiator other than the initiator
holding the persistent reservation that performs a transfer from the initiator to
the storage medium or cache of the logical unit shall result in a reservation
conflict.
Reads Exclusive: Any command from any initiator other than the initiator
holding the persistent reservation that performs a transfer from the storage
medium or cache of the logical unit to the initiator shall result in a reservation
conflict.
Writes Shared: Any application client on any initiator may execute commands
that perform transfers from the initiator to the storage medium or cache of the
logical unit.
Reads Exclusive: Any command from any initiator other than the initiator
holding the persistent reservation that performs a transfer from the storage
medium or cache of the logical unit to the initiator shall result in a reservation
conflict.
Writes Exclusive: Any command from any initiator other than the initiator
holding the persistent reservation that performs a transfer from the initiator to
the storage medium or cache of the logical unit shall result in a reservation
conflict.
Reads Shared: Any application client on any initiator may execute commands
that perform transfers from the storage medium or cache of the logical unit to
the initiator.
Writes Shared: Any application client on any initiator may execute commands
that perform transfers from the initiator to the storage medium or cache of the
logical unit.
Reads Shared: Any application client on any initiator may execute commands
that perform transfers from the storage medium or cache of the logical unit to
the initiator.
Writes Exclusive: Any command from an initiator that has not previously per-
formed a Register service action with the device server that performs a trans-
fer to the storage medium or cache of the logical unit, shall result in a
reservation conflict.
Reads Exclusive: Any command from an initiator that has not previously per-
formed a Register service action with the device server that performs a trans-
fer from the storage medium or cache of the logical unit, shall result in a
reservation conflict.
Writes Exclusive: Any command from an initiator that has not previously per-
formed a Register service action with the device server that performs a trans-
fer to the storage medium or cache of the logical unit, shall result in a
reservation conflict.
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