Command Processing During Startup And Format Operations; Deferred Error; Degraded Mode - IBM IC35L036UWDY10 - Ultrastar 36.7 GB Hard Drive Specifications

11.1.6 Command Processing During Startup and Format Operations

If the drive receives a command from an Initiator while it is executing a startup or format operation, the
response of the drive varies with the command as follows:
INQUIRY
REPORT LUNS
REQUEST SENSE
ALL OTHER

11.1.7 Deferred Error

Error code (71h) of sense data indicates that the CHECK CONDITION status returned is the result of an
error or exception condition that occurred during execution of a previous command for which GOOD
status has already been returned.
The drive creates an Deferred Error condition when
!
FORMAT UNIT command with the immediate bit of one ends with an error.
!
WRITE command ends with an error when WCE (Mode Page 8) is set to one.

11.1.8 Degraded Mode

There are certain errors or conditions which may impair the ability of the drive to function normally. This
mode of limited operation is called the Degraded Mode.
There are three conditions in the Degraded Mode:
! Spindle Motor Degrade is caused by one of the following conditions:
Spindle Motor is not started by the option jumper setting (Disable Auto Spin Up)
–
Spindle Motor is delayed from spinning up by the option jumper setting (Auto Start Delay)
–
Spindle Motor was started (by POR or START STOP UNIT command) and the Target is under
–
the bring-up operation
Spindle Motor failed to start
–
Spindle Motor was stopped by START STOP UNIT command after the drive successfully com-
–
pleted the Self Configuration
! Bring-Up Failure Degraded is caused by one of the following conditions:
Read failure of RAM code or configuration information from media during the bring-up operation
–
Invalid RAM code or configuration information
–
! Format Command Failure Degraded
This condition is caused when FORMAT UNIT command failed or was interrupted abnormally (FDD,
Mode Page 0, controls Format Degraded mode)
The drive sends INQUIRY data and returns appropriate status.
Same as above.
Executes the command, returns a Sense key of NOT READY and an Additional
Sense Code of LOGICAL UNIT NOT READY and returns GOOD STATUS.
The Additional Sense Code Qualifier that is returned depends on type of I/O
processes that are active:
For the START/STOP UNIT and the Auto-start operation, the qualifier returned is
LOGICAL UNIT IS IN PROCESS OF BECOMING READY. For the FORMAT
UNIT command, the qualifier returned is LOGICAL UNIT NOT READY, FORMAT
IN PROGRESS, and the Sense key specific bytes are set to return the progress
indication.
The drive terminates the command with CHECK CONDITION status. The Sense
data generated is described in Request Sense above.
Ultrastar 146Z10 hard disk drive specifications
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