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12.10.6 Input from the Device to the Host Data Structure
12.10.6.1 Overview
The format of the data input from the device to the host includes header information followed by a physical element
descriptor list consisting of physical element status descriptor 0 through physical element status descriptor N.
Table 102 GET PHYSICAL ELEMENT STATUS input from device to host
Offset
Description
0..3
NUMBER OF DESCRIPTORS field (DWord)
4..7
NUMBER OF DESCRIPTORS RETURNED field (DWord)
8..11
IDENTIFIER OF ELEMENT BEING DEPOPULATED field (DWord)
12-13
CURRENT MAXIMUM NUMBER OF DEPOPULATED ELEMENTS
14-15
CURRENT NUMBER OF DEPOPULATED ELEMENTS
16..31
Reserved
32..63
Physical element status descriptor 0 (Bytes)
64..95
Physical element status descriptor 1 (Bytes)
..
s-31 .. s
Physical element status descriptor N (Bytes)
S+1 .. (512 x pc-1)
Zero padding
where:
s is the offset of the last byte of the last physical element status descriptor; and
pc is the requested page count
Zero padding shall be set to zero.
12.10.6.2 NUMBER OF DESCRIPTORS field
The NUMBER OF DESCRIPTORS field shall contain the number of descriptors in the element descriptors list. The
element descriptors list is a list of physical elements that:
a) meet the requirements of the REPORTING OPTIONS field;
b) meet the requirements of the FILTER field; and
c) have an element identifier that is greater than or equal to the element identifier specified by the STARTING
ELEMENT field in the command.
Due to processing considerations outside the scope of this standard, two GET PHYSICAL ELEMENT STATUS
commands with identical values in all command fields may result in two different values in the ELEMENT LIST
LENGTH field.
12.10.6.3 NUMBER OF DESCRIPTORS RETURNED field
The NUMBER OF DESCRIPTORS RETURNED field contains the number of physical element status descriptors in
the input from the device to host data.
12.10.6.4
IDENTIFIER OF ELEMENTS BEING DEPOPULATED
field
The IDENTIFIER OF ELEMENT BEING DEPOPULATED field contains the element identifier of the element that is in
the process of being depopulated. If the value of this field is cleared to zero, then no action specified as result of
repurposing depopulation is in progress.
159
Hard Disk Drive Specification