User guide

SC3500 User Guide Ver 1.3 March 8, 2005 Page 7 of 28
3.3 SCSI Commands
3.3.1 Test Unit Ready Command – 00h
Test Unit Ready CDB
The TEST UNIT READY command provides a means to check if the logical unit is
ready. This is not a request for a self-test. If the logical unit would accept an appropriate
medium-access command without returning CHECK CONDITION status, this command
shall return a GOOD status. If the logical unit cannot become operational or is in a state
such that an initiator action is required to make the unit ready, the target shall return
CHECK CONDITION status with a sense key of NOT READY.
3.3.2 Rezero Unit Command – 01h
Rezero Unit CDB
The REZERO UNIT command requests that the target set the logical unit to a specific
state. This is implemented on the SC3500 as a NOP command and has no effect other
than to verify the CDB.