Product manual

Spinpoint M9TU-USB 3.0 Product Manual REV 1.0

USB INTERFACE AND USB COMMANDS

RelAdr: This bit should be set to zero. Logical

Block Address should be set to zero. PMI: This

bit should be set to zero.

If the UFI device recognizes the formatted medium, the UFI device returns a READ CAPACITY Data

(Table 6-34) to the host on the Bulk In endpoint. The UFI device sets the sense key to NO SENSE if the

command block passed.

Table 6-34: READ CAPACITY Data

The Last Logical Block Address field holds the last valid LBA for use with media access commands. The

Block Length In Bytes field specifies the length in bytes of each logical block for the given capacity

descriptor.

6.5.5 READ FORMAT CAPACITY Command (23h)

The READ FORMAT CAPACITIES command (Table 6-35) allows the host to request a list of the possible

capacities that can be formatted on the currently installed medium. If no medium is currently installed, the UFI

device shall return the maximum capacity that can be formatted by the device.

Table 6-35: READ FORMAT CAPACITY Command

Allocation Length: specifies the maximum number of bytes of format data the Host can receive. If this is less

than the size of capacity data, the UFI device returns only the number of bytes requested. However, the UFI

device shall not adjust the Capacity List Length in the format data to reflect truncation.