FC-4 (FCP) Features
82 SL500: Interface Reference Manual • July 2008 Revision: F • 96122
Device Reservations
The SL500 tape library support the Reserve/Release management method and also
the Persistent Reservations management method. These methods are defined in the
ANSI SCSI-3 Primary Commands (SPC-2) standard. For the reservation restrictions
placed on commands for the Reserve/Release management method, see
TABLE 5-29. For the reservation restrictions placed on the Persistent Reservations
management method, see TABLE 5-30 on page 83.
Conflict Command will not be performed and the library will terminate
the command with Reservation Conflict status.
Allowed Command will be allowed to execute to normal completion.
TABLE 5-29 Reserve/Release Management Method
Command Action when Reserved by a different Initiator
Initialize Element Conflict
Initialize Element with Range Conflict
Inquiry (12h) Allowed
Log Sense (4Dh) Allowed
Mode Select (15h/55h) Conflict
Mode Sense (1Ah/5Ah) Conflict
Move Medium Conflict
Persistent Reserve In (5Eh) Conflict
Persistent Reserve Out (5Fh) Conflict
Position to Element Conflict
Prevent/Allow Removal (1Eh) Prevent = 0, allowed
Prevent = NZ, conflict
Read Element Status Conflict, unless the CurData bit is 1
Release Unit (17h/57h) Allowed, the reservation is not released.
Reported LUNs (A0h) Allowed
Request Sense (03h) Allowed
Request Volume Element Address Conflict
Reserve Unit (16h/56h) Conflict
Send Diagnostic (1Dh) Conflict
Send Volume Tag Conflict
Test Unit Ready (00h) Conflict
Write Buffer (3Bh) Conflict
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