HGST Ultrastar 7K4000 (SAS) Hard Disk Drive Specification
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20.1.9.6 Format Command Failure Degraded Mode
Table 236: Format Command Failure Degraded Mode
Note: Mode Page 0 byte 5 bit 4 (FDD) = 0
Note: See also Section 20.1.9, “Degraded Mode” on page 284 and Section 18.4 " Format Unit (04)" on page 70.
Command (w/Option) Response
Request Sense Executed. The Target may return
Sense Key 02h (Not Ready) ASC/ASCQ 3100h (Format Corrupted)
Sense Key 03h (Medium Error) ASC/ASCQ 3100h (Format Corrupted)
Inquiry (EVPD=0) Executed
Inquiry (EVPD=1) Executed
Test Unit Ready Executed and Check Condition is returned with Sense Key 02h (Not Ready)
ASC/ASCQ 3100h (Format Corrupted)
Format Unit Executed
- Success: Good Status is returned. Format Degraded Mode is cleared
- Failure: Check Condition Status is returned and Format Degraded Mode is
NOT cleared.
Other Commands
(read and write)
Not Executed. Check Condition Status is returned with Sense Key 03h (Medium
Error) ASC/ASCQ 3100h (Format Corrupted)
Non-read/write commands will execute so the drive is as responsive as possible
and for restoring normal operation.