Hitachi IC25N010ATCS04, Технические характеристики

Страница: 185 / 217

Ultra DMA CRC Error Count 199
Off-Line Scan Uncorrectable Sector Count 198
Current Pending Sector Count 197
Reallocation Event Count 196
Status Flag definitions:
Always 0 Reserved bits 6-15
May either be 0 or 1 Reserved bits 2-5
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.
On-Line
Collective bit
1
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.
Pre-Failure/
Advisory bit
0
Definition Flag Name Bit
Figure 125. 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.
The maximum value possible is 253 (FDh).
13.32.2.3 Off-Line Data Collection Status
The value of this byte defines the current status of the off-line activities of the device. Bit 7 indicates an
Automatic Off-line Data Collection Status.
Bit 7 Automatic Off-line Data Collection Status
0 Automatic Off-line Data Collection is disabled.
1 Automatic Off-line Data Collection is enabled.
Bits 0–6 represent a hexadecimal status value reported by the device.
Value Definition
0 Off-line data collection never started.
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
172