Datasheet
Z5K500 OEM Specifications
151
14.41.3 Device Attribute Thresholds Data Structure
The following defines the 512 bytes that make up the Attribute Threshold information. This data structure
is accessed by the host in its entirety using the S.M.A.R.T. Read Attribute Thresholds. All multi-byte fields
shown in these data structures follow the ATA/ATAPI-6 specification for byte ordering, namely that the
least significant byte occupies the lowest numbered byte address location in the field.
The sequence of active Attribute Thresholds will appear in the same order as their corresponding
Attribute Values.
Description Bytes Offset Format Value
Data Structure Revision Number 2 00h binary 0010h
1
st
Attribute Threshold 12 02h (*1) (*2)
... ..
... ..
30
th
Attribute Threshold 12 15Eh (*1) (*2)
Reserved 18 16Ah (*3)
Vendor specific 131 17Ch (*3)
Data structure checksum 1 1FFh (*2)
512
(*1) - See following definitions
(*2) - Value varied by actual operating condition
(*3) - Filled with 00h
Table 116 Device Attribute Thresholds Data Structure
14.41.3.1 Data Structure Revision Number
This value is the same as the value used in the Device Attributes Values Data Structure.
14.41.3.2 Individual Thresholds Data Structure
The following defines the 12 bytes that make up the information for each Threshold entry in the Device
Attribute Thresholds Data Structure. Attribute entries in the Individual Threshold Data Structure is in the
same order and correspond to the entries in the Individual Attribute Data Structure.
Description Bytes Offset Format
Attribute ID Number (01h to FFh) 1 00h binary
Attribute Threshold (for comparison with Attribute Values
from 00h to FFh)
1 01h binary
00h - “always passing” threshold value to be
used for code test purposes
01h -
minimum value for normal operation
FDh -
maximum value for normal operation
FEh -
invalid for threshold value
FFh -
“always failing” threshold value to be
used for code test purposes
Reserved (00h) 10 02h binary
Total Bytes 12
Table 117 Individual Threshold Data Structure
14.41.3.3 Attribute ID Numbers
Attribute ID Numbers supported by the device are the same as Attribute Values Data Structures.