Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
324
20.15.3.2
Data Error Logging
The Drive will report data errors to the initiator that do not require immediate action (successful auto reallocation,
successful auto rewrite, or no action needed on this occurrence). The initiator should log these errors in the system
error log. No other action is required.
Table 282 Log Only Errors
Key
Code
Qual
Description
1
16
00
Data Synchronization Mark Error
1
17
01
Recovered Data with Retries
1
17
06
Recovered Data without LDPC - Auto Reallocated
1
17
09
Recovered Data without LDPC - Data Rewritten
1
18
00
Recovered Data with LDPC
1
18
02
Recovered Data with LDPC - Auto Reallocated
1
18
07
Recovered Data with LDPC - Data Rewritten
20.15.3.3
Reassign Blocks Recovery
The Drive provides the capability to remove media defects without reducing capacity.
Recovery from a failed reassignment consists of the following actions:
- Updating the defect descriptor to remove the LBA's that have been successfully reassigned and then retry the
Reassign Blocks command. The LBA contained in the Command Specific Information field of the Sense Data is
the LBA in the first defect descriptor that was not reassigned because of the failure. If the command failed
because of an unrecoverable read error other than those specified in the defect descriptor, add this LBA to the
defect descriptor and retry the command. Refer to Section 18.28 "REASSIGN BLOCKS (07)", for additional
information.
- If the retried Reassign Blocks (07) command completes successfully, returning to normal processing.
- If the retried Reassign Blocks (07) command fails, servicing the drive using the service guidelines
recommended in Section 20.15.1 "Drive Service Strategy" .