Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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Following is a description of the target behavior for each setting of AWRE. AWRE setting effects only No Sector Found Errors
on writes.
AWRE =1: An error site determined to need reassignment during a write is automatically reallocated at the conclusion
of the write and prior to sending the status. The site will be automatically reallocated only if the write recov-
ery succeeded at the conclusion of the write.
AWRE =0: An error site determined to need reassignment during a write is recommended for reassignment at the con-
clusion of the write.
The setting of the AWRE bit is checked and the target will automatically reallocate or recommend reassign for the following
commands.
• Write(6)
• Write(10)
• Write portion of Write and Verify
For all other commands the AWRE setting is ignored and the target will not automatically reallocate or recommend reassign.
Auto/Recommend Reallocate information is communicated via the sense data returned following a command during which a
site was determined to need rewriting or reassignment. The LBA returned in the sense data is the LBA that was determined to
need rewriting or reassignment.
The sense data combinations with auto/recommend rewrite/reallocate are listed below.
Table 261:Sense data combinations with auto/recommend rewrite/reallocate
Key Code Qual Description
1 17 01 Recovered Data with retries
1 17 06 Recovered Data without ECC - Auto Reallocated
1 17 07 Recovered Data without ECC - Recommend Reassign
1 17 09 Recovered Data without ECC - Data Rewritten
1 18 00 Recovered Data with ECC
1 18 02 Recovered Data with ECC - Auto Reallocated
1 18 05 Recovered Data with ECC - Recommend Reassign
1 18 07 Recovered Data with ECC - Data Rewritten