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SCSI REFERENCE 1014826
CHAPTER 3—IMPLEMENTING SCSI OPERATIONS
If desired, you can use the MODE SELECT (15h) command to change the
element addresses assigned to the different types of elements. The element
addresses for the cartridge cells are numbered consecutively, with the first
address being the starting element address that you specify for the storage
elements. To view the current addresses, use the MODE SENSE (1Ah)
command.
3.4 UNDERSTANDING THE CARTRIDGE INVENTORY
The library maintains a cartridge inventory in volatile memory. The inventory
is automatically re-established whenever a cartridge is Imported or Exported
from the library. The inventory contains information about the following
element locations:
The library uses the information stored in the cartridge inventory to process
SCSI commands.
3.4.1 ESTABLISHING THE CARTRIDGE INVENTORY
The library automatically updates the cartridge inventory when it is powered
on, whenever a magazine is inserted, or whenever the cartridge access port
door is opened, then closed again. You can use the INITIALIZE ELEMENT
STATUS (07h) or INITIALIZE ELEMENT STATUS WITH RANGE (37h)
command to attempt reading a bar code label that could not be read during
the most current cartridge inventory operation.
Element Description
Medium
transport
The cartridge handling mechanism (robot) is the medium
transport element. This mechanism moves the cartridges
between the tape drive(s) and the storage cells.
Storage
(slots/cells)
a
Magnum 224 or T24—24 storage elements
SL 2U—20 storage elements
Magnum 448—48 storage elements
Data transfer A tape drive is a data transfer element that reads and writes data
as requested by the host.
Magnum 224, T24, or SL 2U—one or two data transfer
elements
Magnum 448—one, two, three, or four data transfer elements
Import/Export
a
Magnum 224, T24, or SL 2U—one I/E port element
Magnum 448—two I/E port elements
a
The storage slots/cells increase or decrease based on the I/E Ports setting (enabled or disabled). Disabling
the I/E Ports increase the storage slot/cell count. You can also assign slot/cell 2 as a “fixed” cleaning slot
(see the Magnum 224, StorageLibrary T24, or StorageLoader 2U LTO Library Product Manual or the
Magnum 448 LTO Library Product Manual).
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