Chapter 14 Scsi-2 Commands: Reserve; Reserve Format (16H) - Spectra Logic Spectra 10000 User Manual

10kdev_.book Page 115 Friday, March 12, 1999 9:44 AM
Chapter 14
SCSI-2 Commands: Reserve
The Reserve command allows the initiator to reserve the library or its elements. The
elements reserved are released as a result of a Release (17h) command from the same
initiator, a Bus Device Reset condition, a SCSI bus reset or a power-on cycle of the library.
The Reserve command may be used to modify or supersede a previous reservation by the
same initiator. If the newest reservation does not result in any reservation conflicts or
error conditions, it is completed and the previous reservation released.

Reserve Format (16h)

Bit
Byte
00
01
02
03
-
04
05
Field Definitions
Logical Unit Number (Byte 01, bits 7-5)
The library does not support Logical Unit Numbers, so this field must be 0.
7 6 5 4
0 0 0 1
Logical Unit Number 3rdPty
Reservation Identification
(MSB)
Element List Length
(LSB)
0 0 Reserved
3 2 1 0
0 1 1 0
Third Party Device Element
ID
0 0