HGST TRAVELSTAR 80GN 30GB ATA5 08K0910 User Manual

Travelstar 80GN Hard Disk Drive Specification

171

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 multibyte fields shown in 
these data structures follow the ATA-3 specification for byte ordering, that is, that the least significant byte occu-
pies 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.

(*1) – See the following definitions
(*2) – Value varies by actual operating condition
(*3) – Filled with 00h

This value is the same as the value used in the Device Attributes Values 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 are in the same order and 
correspond to the entries in the Individual Attribute Data Structure.

Data Structure Revision Number

2

00h

binary

0010h

1st Device Attribute

12

02h

(*1)

(*2)

...

..

... ..

30th Device Attribute

12

15Eh

(*1)

(*2)

Reserved

18

16Ah

(*3)

Vendor specific

131

17Ch

(*3)

Data structure checksum

1

1FFh

(*2)

512

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