Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
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20.15.4
Non data Error Recovery Procedure
The Drive will follow a logical recovery procedure for non data errors. The initiator options for non-data errors are
limited to logging the error, retrying the failing command, or replacing the drive.
These recovery procedures assume the initiator practices data back-up and logs errors at the system level for
interrogation by service personnel.
20.15.4.1
Drive Busy
The Drive is busy performing an operation. This is not an error condition. The initiator can test for completion of
the operation by issuing Test Unit Ready (00) (or media access) commands.
- If the Test Unit Ready (00) (or media access) command completes with Check Condition Status then issue a
Request Sense (03)
- If the specified recovery procedure for the sense data is for a condition other than drive busy, follow the
recovery procedure for the condition reported.
- If the specified recovery procedure for the sense data is for a drive busy condition, then continue re-issuing the
Test Unit Ready (00) and Request Sense commands for the duration of a media access time-out or until the
drive returns Good Status.
- If the drive has been busy for longer than the limit specified in Section 20.14, "Command Time out Limits" then
service the drive using the service guidelines recommended in Section 20.15.1 "Drive Service Strategy"
Otherwise return to normal processing.
- If the Test Unit Ready (00) (or media access) command completes with Good Status, then return to normal
processing.
20.15.4.2
Unrecovered Drive Error
The initiator should retry the failing command.
1. If the retry of the failing command completes with Good Status or recovered Sense Key, follow the recovery
procedure in Section 20.15.4.3 "Recovered Drive Error".
2. If the retry of the failing command completes with hardware error sense, verify there is no outside cause
(e.g., power supply) for the failure, then retry the failing command.
a. If the retry of the failing command completes with Good Status, follow the recovery procedure in next
Section 20.15.4.3 "Recovered Drive Error".
b. If the retry of the failing command completes with Recovered sense or Hardware error sense, then service
the drive using the service guideline recommended in Section 20.15.1 "Drive Service Strategy".
20.15.4.3
Recovered Drive Error
The Initiator should log the error as soft with the recovery level.