Datasheet

Z5K500 OEM Specifications
148
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).