Operating instructions

4-2
SCSI REFERENCE 1012975
CHAPTER 4—INITIALIZE ELEMENT STATUS (07h)
For best bar code scan results, refer to Magnum 1x7 LTO Autoloader Product
Manual for information about positioning the bar code labels on data
cartridges.
The bar code scanner is in a fixed position behind the cartridge access port.
The autoloader cannot scan a label on a cartridge that is in or protruding
from the tape drive.
4.2 WHAT YOU SEND TO THE AUTOLOADER
NBL (No Barcode Labels) – Byte 05, Bit 7
The autoloader ignores this bit. If a cartridge does not have a bar code label,
the cartridge inventory indicates that the label is unreadable.
4.3 EFFECTS ON THE CARTRIDGE INVENTORY
The autoloader updates the cartridge inventory whenever it is powered on or
whenever the cartridge access port door is opened, then closed again. During
the inventory it checks for the presence of a cartridge at each location and
scans the bar code labels. This section describes how the autoloader updates
the cartridge inventory.
Ta b l e 4 - 1 through Ta b l e 4 - 3 illustrate the various outcomes of a requested scan
operation and the effect on the cartridge inventory.
A request is made to scan a cartridge in a storage location and the scan
operation completed successfully (the bar code scanner was able to read the
label on the cartridge or the location was empty). See Ta b l e 4 - 1 for details
about how the cartridge inventory is updated.
Table 4-1 Effect on the cartridge inventory of a cartridge scan in a storage location
This cartridge inventory field...
... is changed to the following when...
... the location is empty ... the location is full
Occupied 0 1
Occupied Valid 1 1
Label blanks cartridge label
Label Valid 0 1
Label Scan Retries 0 updated if retried
Source Storage Element Address no change no change