Quantum ACL 4/52, Дополнительное руководство

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ACL 4/52 Software Interface Guide
Document 6211225-03
Version 3.0
SCSI Interface 3-9
Initialize Element Status (07h)
The Initialize Element Status Command allows the host to request an
inventory of the tape cartridges held in a library. The library conducts
an inventory and determines whether each element contains a tape
cartridge. The inventory will read the bar code of each tape (unless
commanded not to). If no bar code is read, the library will use sensors
to determine whether each element contains a tape.
Inventory information is returned to the host only if requested using
the Read Element Status command.
The library does not accept any other commands from the host during
the inventory process.
The host can issue an Abort of the inventory for the library. If another
Initialize Element Status command is then issued, the inventory
process is restarted from the beginning.
If the gripper contains a tape cartridge, the inventory procedure
cannot be conducted. In this case a Transfer Full error (SK=5 ASC=80
ASCQ=01) is returned. The cartridge should be moved to an available
bin, and the command retried.
The format for this command data block is shown in Table 3.
Table 3: Initialize
Element Status Cmd
Logical Unit Number The Logical Unit Number must be set to 0. This field indicates
which logical unit the command should be sent to.
NBL A
No Bar-code Labels
field of 1 specifies the inventory to not scan
the bar codes of the elements and set the corresponding primary
volume tags to empty. A value of 0 specifies element bar code
labels are to be scanned and placed in the primary volume tags.
Bit/Byte 7 6 5 4 3 2 1 0
0
Operation Code (07h)
1
Logical Unit Number Reserved (00h)
2
Reserved (00h)
3
Reserved (00h)
4
Reserved (00h)
5
NBL Reserved (00h)