Hitachi hard disk 0J11285 500 GB 2.5 " 8 MB 0J11285 Ficha De Dados
Códigos do produto
0J11285
Z5K500 OEM Specifications
22
5.5
5.6
5.7
Data buffer test
The data buffer is tested at power on reset and when the hard disk drive self-test is requested by the host.
The test consists of a write/read '00'x and 'ff'x pattern on all buffers.
The test consists of a write/read '00'x and 'ff'x pattern on all buffers.
Error recovery
Errors occurring on the hard disk 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.
Automatic reallocation
The sectors that show some errors may be reallocated automatically when specific conditions are met.
The hard disk drive does not report any auto reallocation to the host system. The conditions for auto
reallocation are described below.
The hard disk drive does not report any auto reallocation to the host system. The conditions for auto
reallocation are described below.
5.7.1
Non-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 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 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
Non-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
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
predefined conditions.
reallocated automatically. A media verification sequence may be run prior to the reallocation according to
predefined conditions.