Hitachi IC25N040ATCS04-0 Specifications - Page 185

Off-Line Data Collection Status

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196 Reallocation Event Count 197 Current Pending Sector Count 198 Off-Line Scan Uncorrectable Sector Count 199 Ultra DMA CRC Error Count Status Flag definitions: Bit Flag Name 0 Pre-Failure/ Advisory bit 1 On-Line Collective bit 2-5 6-15 Reserved bits Reserved bits Definition 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. 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. May either be 0 or 1 Always 0 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 0 1 Automatic Off-line Data Collection Status Automatic Off-line Data Collection is disabled. 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

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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