Hitachi 100GB 7200 RPM HTE721010G9SA00 Benutzerhandbuch

Travelstar E7K100 (Serial ATA) Hard Disk Drive Specification

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The sectors that show some errors may be reallocated automatically when specific conditions are met. The spare 
tracks for reallocation are located at regular intervals from Cylinder 0. The conditions for auto-reallocation are 
described below.

When a write operation can not be completed after the Error Recovery Procedure (ERP) is fully carried out, the 
sector(s) 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 fails.

If the number of available spare sectors reaches 16 sectors, the write cache function will be disabled automatically.

When a read operation fails after a defined 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 verifications is performed automatically. When the result of this 
verification meets the criteria, this sector is reallocated.

When a read operation for a sector fails once and then is recovered at the specific ERP step, this sector of data is 
reallocated automatically. A media verification sequence may be run prior to the relocation according to the 
predefined conditions.