Operating instructions

19-4

SCSI REFERENCE 1012975

CHAPTER 19—REQUEST VOLUME ELEMENT ADDRESS (B5h)

19.3 WHAT THE AUTOLOADER RETURNS

19.3.1 VOLUME ELEMENT ADDRESS HEADER

The autoloader returns one Volume Element Address Header for each

REQUEST VOLUME ELEMENT ADDRESS command that it receives.

First Element Address Reported – Bytes 00 and 01

This field indicates the address of the first element that has a bar code label

that matches the template sent by the SEND VOLUME TAG (B6h) command.

Number of Elements Reported – Bytes 02 and 03

This field indicates the total number of element descriptors available to be

transferred to the initiator. The status of these elements is returned if a

sufficient Allocation Length value was specified in the CDB.

Send Action Code – Byte 04, Bits 4 through 0

This field contains the action code in the SEND VOLUME TAG command that

created the data. The autoloader supports a Send Action Code of 5h.

Byte Count of Report Available – Bytes 05 through 07

This field indicates the total number of bytes of information available to be

transferred to the initiator. This value is not adjusted to match the Allocation

Length.

Bit

Byte

7 6 5 4 3 2 1 0

00 (MSB)

First Element Address Reported

(LSB)

02 (MSB)

Number of Elements Reported

(LSB)

04 Reserved Send Action Code

05 (MSB)

Byte Count of Report Available

(LSB)