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their copied virtual tapes. When a backup of a virtual tape begins, its associated phys-
ical tapes will be used.

Whenever the library door is opened and then closed, the tape status for all physical
tapes is automatically refreshed. During the refresh, the physical tape barcodes will
be read and their “Contents” remembered. Else, if a tape does not have a barcode, or
a barcode error occurs, the physical tape status will be reset. Thus, barcoded tapes
will retain the reference to their “Contents”. However, tapes not reporting a barcode
will not.

The “Contents” and status of an individual tape cartridge can be reset by invalidating
the physical tape status. Invalidating the tape status drops the reference to its “Con-
tents” and refreshes the physical library slot.

To invalidate a tape cartridge and refresh the physical library slot, first select the tape
cartridge on the physical tapes tab. Right-click the selected tape, and then a popup
menu will appear with a command to “Invalidate this information”.

The physical tapes in the library are presented in a table with rows for each tape
cartridge and columns for the following tape fields (See Figure 3-56):

•

Location: Tape cartridge label or slot number. If the tape cartridge is not 

labeled, the tape is identified by its slot number.

•

Status: Tape cartridge condition as either “OK” or “Bad tape”. The “Status” will 

report “Bad tape” if an error occurs when writing/reading or accessing the tape. 
Along with the condition, “write protect” will also appear if physically write-
protected.

•

VT for offloading: Virtual tape the contents were copied from, else 

“(unknown)”. “Contents” also indicates the virtual tape to which the tape cartridge* 
is referenced. (* or library slot, if the library does not report barcodes)

•

Offload Status.