HP Q153090901 - Manual (Page 98)

Commands 98
PERSISTENT RESERVE IN 5Eh
PERSISTENT RESERVE IN is used to obtain information about persistent reservations and reservation keys that
are active within a tape drive logical unit
.
Pre-execution checks:
Command descriptor block:
CDB fields:
Illegal Field Reservation Deferred Error Unit Attention
7 6 5 4 3 2 1 0
0 Operation Code (5Eh)
1 Reserved (0) Service Action
2
Reserved (0)
6
7
(MSB)
Allocation Length
8 (LSB)
9 Control
Service Action The service action types that are supported are:
00h Read Keys Returns all registered reservation keys
01h Read Reservation Returns information on any current persistent reservation
02h Read Capabilities Returns details of the persistent reservation features supported
Allocation
Length
The maximum amount of data (in bytes) that should be returned to the host. The drive will
return all of the requested information or allocation length bytes, whichever is least.