HGST Travelstar 7K500 BE, 250GB 0A79102 Benutzerhandbuch
Produktcode
0A79102
7K500 OEM SPECIFICATION
Page 23 of 176
5.5
5.5
5.5
5.5 Data buffer test
Data buffer test
Data buffer test
Data buffer test
The data buffer is tested at power on reset and when a drive self-test is requested by the host. The test
consists of a write/read '00'x and 'ff'x pattern on all buffers.
consists of a write/read '00'x and 'ff'x pattern on all buffers.
5.6
5.6
5.6
5.6 Error recovery
Error recovery
Error recovery
Error recovery
Errors occurring on the drive are handled by the error recovery procedure.
Errors that are uncorrectable after application of the error recovery procedure are reported to the host
system as non-recoverable errors.
system as non-recoverable errors.
5.7
5.7
5.7
5.7 Automatic reallocation
Automatic reallocation
Automatic reallocation
Automatic reallocation
The sectors that show some errors may be reallocated automatically when specific conditions are met.
The drive does not report any auto reallocation to the host system. The conditions for auto reallocation
are described below.
The drive does not report any auto reallocation to the host system. The conditions for auto reallocation
are described below.
5.7.1
5.7.1
5.7.1
5.7.1
Non
Non
Non
Non----recovered write errors
recovered write errors
recovered write errors
recovered write errors
When a write operation cannot be completed after the Error Recovery Procedure (ERP) is fully carried out,
the sectors are reallocated to the spare location. An error is reported to the host system only when the
write cache is disabled and the auto reallocation has failed.
the sectors are reallocated to the spare location. An error is reported to the host system only when the
write cache is disabled and the auto reallocation has failed.
5.7.2
5.7.2
5.7.2
5.7.2
Non
Non
Non
Non----recoverable read error
recoverable read error
recoverable read error
recoverable read error
When a read operation fails after ERP is fully carried out, a hard error is reported to the host system. This
location is registered internally as a candidate for the reallocation. When a registered location is specified
as a target of a write operation, a sequence of media verification is performed automatically. When the
result of this verification meets the required criteria, this sector is reallocated.
location is registered internally as a candidate for the reallocation. When a registered location is specified
as a target of a write operation, a sequence of media verification is performed automatically. When the
result of this verification meets the required criteria, this sector is reallocated.
5.7.3
5.7.3
5.7.3
5.7.3
Recovered read errors
Recovered read errors
Recovered read errors
Recovered read errors
When a read operation for a sector fails and is recovered at the specific ERP step, the sector is
reallocated automatically. A media verification sequence may be run prior to the reallocation according to
the predefined conditions.
reallocated automatically. A media verification sequence may be run prior to the reallocation according to
the predefined conditions.