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12.21.15.1 Current Device Internal Status data pages
The Saved Device Internal Status Data header is described in Table.
Table 155 Saved Device Internal Status Data header (page 0)
Offset
Type
Description
0
Bytes
LOG ADDRESS field (see Section 12.21.15.1.1)
1..3
Bytes
Reserved
4..7
DWord
Organization identifier (see Section 12.21.14.1.2)
Bit Description
31:24 Reserved
23:0 IEEE OUI field
8..9
DEVICE INTERNAL STATUS DATA AREA 1 LAST LOG PAGE field
(see Section 12.21.14.1.3)
10..11
DEVICE INTERNAL STATUS DATA AREA 2 LAST LOG PAGE field
(see Section 12.21.14.1.4)
12..13
DEVICE INTERNAL STATUS DATA AREA 3 LAST LOG PAGE field
(see Section 12.21.14.1.5)
14..381
Reserved
382
SAVED DATA AVAILABLE field (see Section 12.21.15.1.2)
383
SAVED DATA GENERATION NUMBER field (see Section 12.21.15.1.3)
384..511
Bytes
REASON IDENTIFIER field (see Section 12.21.14.1.8)
12.21.15.1.1
LOG ADDRESS field
The LOG ADDRESS field shall be set to 25h. 12.21.15.1.2 SAVED DATA AVAILABLE field
If the SAVED DATA AVAILABLE field is cleared to zero, the Saved Device Internal Status Data log does not contain
saved Device Internal Status Data. If the SAVED DATA AVAILABLE field is set to one, the Saved Device Internal
Status Data log contains Saved Device Internal Status Data. If any page of the Saved Device Internal Status Data in
the Saved Device Internal Status Data log is read, the SAVED DATA AVAILABLE field shall be cleared to zero. If the
device saves Saved Device Internal Status Data in the Saved Device Internal Status Data log, the SAVED DATA
AVAILABLE field shall be set to one.
12.21.15.1.3
SAVED DATA GENERATION NUMBER field
The SAVED DATA GENERATION NUMBER field shall contain a value that is incremented each time the device
initiates a capture of its internal device state into the Saved Device Internal Status Data.
12.21.15.2
Current Device Internal Status data pages
The Saved Device Internal Status Data log pages shall represent the device internal state.
Table 156 Saved Device Internal Status Data (pages 1..n)
Offset
Type
Description
0..511
Bytes
Vendor Specific
221
Hard Disk Drive Specification