TEST UNIT READY(1)

 

 

 

 

 

 

 

 

 

 

 

 

 

GOOD

 

 

 

 

 

 

CHECK CONDITION

exit: LOGICAL

 

UNIT READY

 

 

 

 

 

 

 

 

 

 

 

REQUEST

 

SENSE (2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERFACE

 

 

 

TEST UNIT

READY (3)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GOOD

 

 

 

 

 

 

CHECK CONDITION

exit: LOGICAL

 

UNIT READY

 

 

 

 

 

 

 

 

 

 

 

REQUEST

 

SENSE (4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TEST UNIT

READY (5)

 

 

 

 

 

 

 

 

 

 

 

 

 

GOOD

 

 

 

 

 

 

CHECK CONDITION

exit: LOGICAL

 

UNIT READY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REQUEST

SENSE (6)

 

 

 

 

 

 

 

 

 

 

 

 

 

NOT READY

 

 

 

 

 

 

OTHER CHECK

exit: LOGICAL

 

UNIT READY

 

 

 

exit: LOGICAL

 

UNIT FAILED

 

 

 

 

Figure 3.6 Verify State Test

TEST UNIT READY (1):

This TEST UNIT READY command is used to determine if any outstanding CHECK CONDITION or UNIT ATTENTION condition exists. If not, the device is indicated to be ready.

REQUEST SENSE (2):

This REQUEST SENSE command is used to clear the outstanding CHECK CONDITION. Most SCSI-2 logical units return UNIT ATTENTION sense key in this sense information.

M3099GX/GH OEM Manual

3-113