Hitachi HUS154530VLF400 User Manual

Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification

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ground mode as previously described.

For a related function, see Mode Page 1C (Informational Exceptions Control),  page 193

1h

Drive Ready Test

Internal check to insure drive is “ready”, similar to a Test 
Unit Ready command.

2h

Drive Diagnostics

This test is comprised of the Default Self Test as defined 
in Section 21.18.2.1, “Default Self-test” on page 334

3h

SMART

Perform SMART testing and check results to ensure that 
SMART threshold criteria are not exceeded

4h

Low Level Format check

Check to insure that the media is currently not in the 
MEDIA FORMAT CORRUPTED state.

5h

Physical Head Check

Write/Read test on each head in a predefined location in 
the drive's Reserved Area of the disk.

6h

Random Verify

Perform 4000 random verify operations and insure no 
uncorrectable errors.

7h

- Verify First 
300MB

- Verify Last 
100 MB

Verify all 
LBA’s

Sequential verify operation. Ensure that no uncorrect-
able errors occur within the verify range.

8h

Recheck SMART

Same as segment 3h.