Chapter 4 SCSI Commands
PERSISTENT RESERVE IN Command (5Eh)
DLT-S4 Interface Reference Guide
214
Figure 111
and
table 117
illustrate and describe the data fields of each
Read Reservation descriptor’s data fields.
Figure 111
PERSISTENT
RESERVE IN
Read
Reservation Descriptor — Data
Format
Additional Length
Contains the count of the number of bytes that are in the Read Reservation
descriptors (bytes 8 –
n
). Note that this field contains the number of bytes
regardless of the value prescribed by the Allocation Length field in the
command’s CDB.
Reservation
Descriptors
The drive reports one Reservation descriptor for each unique persistent
reservation on the logical unit when the
PERSISTENT RESERVE IN
command has
indicated a Read Reservation action.
Figure 111
and
table 117
contain details
about the contents of each Reservation Descriptors field.
Bit
7
6
5
4
3
2
1
0
Byte
0 — 7
(MSB)
Reservation Key
(LSB)
8 — 11
(MSB)
Scope-Specific Address
(LSB)
12
Reserved
13
Scope
Type
14 — 15
Obsolete
Field
Description
