Device Reservations
August 2016 Operations 33
Device Reservations
The T10000 tape drives 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.
• See TABLE 2-2 for the reservation restrictions placed on commands for the
Reserve/Release management method.
• See TABLE 2-3 on page 35 for the reservation restrictions placed on the Persistent
Reservations management method.
Each method lists the type of restriction for the command being performed:
Conflict
Command will not be performed and the drive will terminate the command with
Reservation Conflict status.
Allowed
Command will be allowed to execute to normal completion.
TABLE 2-2 Reserve/Release Management Method
Command Action when Reserved by a different Initiator
Erase (19h) Conflict
Inquiry (12h) Allowed
Load Display (06h) Conflict
Load/Unload (1Bh) Conflict
Locate (2Bh) Conflict
Log Select (4Ch) Conflict
Log Sense (4Dh) Allowed
Mode Select (15h/55h) Conflict
Mode Sense (1Ah/5Ah) Conflict
Persistent Reserve In (5Eh) Conflict
Persistent Reserve Out (5Fh) Conflict
Prevent/Allow Removal (1Eh) Prevent = 0, allowed
Prevent = NZ, conflict
Read (08h) Conflict
Read Attribute (8Ch) Conflict
Read Block Limit (05h) Allowed
Read Buffer (3Ch) Conflict
Read Media Serial Number (ABh–01h) Allowed
Read Position (34h) Conflict
Read T10 PI (98h) Conflict
Receive Diagnostic Results (1Ch) Conflict
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