Operating instructions

3-8
SCSI REFERENCE 1012975
CHAPTER 3—IMPLEMENTING SCSI OPERATIONS
Total Number of Cartridge Puts
The Total Number of Cartridge Puts field indicates the total number of put
operations for each element location. Each time a cartridge is moved to an
element location, the total number of puts for that location is incremented.
Note that the pick from one element location and put to another are
accomplished in a single motion. This field is cleared when the autoloader is
reset.
Source Element Address
The Source Element Address field shows the address of the last storage
element from which the cartridge was moved.
3.5 MOVING CARTRIDGES
To instruct the autoloader to move cartridges between a storage location and
the tape drive, issue the MOVE MEDIUM (A5h) command. The MOVE
MEDIUM command allows you to specify a source element address and a
destination element address for a specific move operation.
3.6 RESERVING ELEMENTS
To reserve the entire autoloader for exclusive use by one initiator, use either
form of the RESERVE (16h or 56h) command, as follows:
 To reserve specific elements within the autoloader, use the six-byte
RESERVE (16h) command.
 To perform a 3rd Party reservation, use the ten-byte RESERVE (56h)
command.
 To reserve the entire autoloader as a unit, use either form of the RESERVE
command.
Note: Use a tape drive’s RESERVE UNIT command to ensure that the initiator
has exclusive use of the tape drive for tape operations.
When an initiator reserves the entire autoloader or an element within the
autoloader, the same initiator must use the RELEASE (17h or 56h) command to
cancel the reservation.
3.7 INQUIRING ABOUT AUTOLOADER STATUS
To inquire about the autoloader status, you can use the following commands: