Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
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mode to prevent writing data off track.
Recovery of this condition is either a power cycle or successful completion of the Send Diagnostic (1D).
Service the drive using the recommended service guidelines specified in Section 20.15.1 "Drive Service
Strategy", if the power cycle or the Send Diagnostic (1D) command fail to complete successfully.
3. Sense Code/Qualifier of Format Command Failed Format Unit (04), Sense Code/Qualifier of Medium
Format Corrupted Reassign Failed Reassign Blocks (07) command, or an automatic reallocation failed or
was abnormally terminated.
Recovery from a failed Format Unit (04) is achieved by retrying the command. If the command fails a second
time, service the drive following the procedure defined in Section 20.15.1 "Drive Service Strategy".
If the above defined recovery procedures fail to clear the degraded mode condition, the Drive should be replaced.
Follow the procedure in Section 20.15.1 "Drive Service Strategy", when replacing the drive.
20.15.4.7
Reserved Area Hard Error
Sectors found defective in the reserved area of the disk cannot be reassigned after the Drive leaves the factory. The
data in the reserved area is not directly accessible by the initiator. For this reason, the reserved area has all data. A
data error must occur in both copies of the data record before the Drive considers a reserved area read error. When
this happens, the integrity of the drive is questionable.
Service the Drive using Section 20.15.1 "Drive Service Strategy".
20.15.4.8
Interface Protocol
For all interface protocol errors, the initiator should complete the following steps:
1. Correct the parameter that caused the Illegal Request
2. Retry the failing command
3. If the first retry of the failing command completes with
- Good Status, log the error as recovered
- Check Condition Status with sense data for an Illegal Request, verify there is no outside cause (for example,
the power supply) for the failure
- Other, follow the recommendations for the error condition reported. Retry the failing command. If this retry of
the failing command completes with
• Good Status, log the error as recovered
• Check Condition Status with sense data for an Illegal Request, service the drive using the service
guideline recommended in Section 20.15.1 "Drive Service Strategy".
• Other, follow the recommendations for the error condition reported.
20.15.4.9
Aborted Command
The initiator should determine the cause from the Additional Sense Code (byte 12):
- Sense Key = B (Aborted Command) with Additional Sense Codes of 1B, 25, 43, 49, and 4E are initiator caused
abort conditions. The initiator should correct the condition that caused the abort and retry the failing command.
- Sense Key = B (Aborted Command) with Additional Sense Code of 44 or 48 are drive caused abort conditions.
The initiator should:
1. Retry the failing command.
2. If the retry of the failing command completes with
- Good Status, log the error as recovered.
- Abort Command Sense, verify there is no outside cause (e.g. power supply) for the failure.
3. Retry the failing command.
4. If the retry of the failing command completes with
- Good Status, log the error as recovered.