7K320 (SATA) OEM Specification
Page 150 of 176
Attribute ID Numbers:
Any non-zero value in the Attribute ID Number indicates an active attribute. The
device supports following Attribute ID Numbers. Those marked with (*) indicate that corresponding Attribute
Values can be either collected on-line or off-line. Those marked with (**) indicate that corresponding
Attribute Values is only for Free-fall sensor supported model.
ID
Attribute Name
0
Indicates that this entry in the data structure is not used
1
Raw Read Error Rate (*)
2
Throughput Performance (*)
3
Spin Up Time
4
Start/Stop Count
5
Reallocated Sector Count
7
Seek Error Rate
8
Seek Time Performance (*)
9
Power-On Hours Count
10
Spin Retry Count
12
Device Power Cycle Count
160
Free-fall Sensor Self Test Result (**)
191
G Sense error rate
192
Power off retract count
193
Load/Unload cycle count
194
Device Temperature
196
Reallocation Event Count
197
Current Pending Sector Count
198
Off-Line Scan Uncorrectable Sector Count
199
Ultra DMA CRC Error Count
223
Load Retry Count
254
Free-fall Sensor Work Count
Status Flag Definitions:
Bit Flag
Name
Definition
0
Pre-Failure/Advisory bit
If bit = 0, an Attribute Value less than or equal to its
corresponding Attribute Threshold indicates an Advisory
condition where the usage or age of the device has
exceeded its intended design life period.
If bit = 1, an Attribute Value less than or equal
to its corresponding Attribute Threshold
indicates a Pre-Failure condition where imminent
loss of data is being predicted.
1
On-Line Collective bit
If bit = 0, the Attribute Value is updated only during
Off-Line testing.
If bit = 1, the Attribute Value is updated during On-Line
testing or during both On-Line and Off-Line testing.
2-5
Reserved bits
may either 0 or 1
6-15
Reserved bits
Always 0
Table 115 Status Flag Definitions
Normalized Values: The device will perform conversion of the raw Attribute Values to transform
them into normalized values, which the host can then compare with the Threshold values. A
Threshold is the excursion limit for a normalized Attribute Value. In normalizing the raw data, the
device will perform any necessary statistical validity checks to ensure that an instantaneous raw
value is not improperly reflected in the normalized Attribute Value (i.e., one read error in the first 10
reads being interpreted as exceeding the read error rate threshold when the subsequent 1 billion
reads all execute without error). The end points for the normalized values for all Attributes will be 1
(01h) at the low end, and 100 (64h) at the high end for the device. For Performance and Error Rate
Attributes, values greater than 100 are also possible, up to a maximum value of 253 (FDh).
