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Things You Should Never Do
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Things You Should Try to Avoid Doing
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Magstar 3494 Tape Library Operator Guide
This section gives a list of actions that you should never perform when operating a
3494. Failure to follow these recommendations will result in serious problems,
including severe performance degradation.
v Never remove cartridges from tape drives unless told to do so by the Library
Manager. Moving a cartridge can result in it being marked misplaced or
inaccessible. The Library Manager will automatically clear the drive while in
Automatic mode. Here are some cases where the Library Manager will indicate
that the operator should clear the drive:
– An operator intervention indicates that a tape drive failure has occurred and
the cartridge should be removed from the specified drive.
– A re-inventory of the complete system has been requested. At this time all
cartridges should be removed from the drives and placed in empty cells. The
re-inventory scans all cells and recreates the inventory database.
– If the library is being used in Manual Mode and a mount is requested for a
drive that has a cartridge in its feed slot, the cartridge should be removed
from the drive so the mount can be performed. On returning to Automatic
mode, cartridges which are already loaded in the drives or in the feed slot
should be left in place.
v Never insert more cartridges into empty cells in the library than there are free
cells indicated on the Operational Status panel. This is because cartridges
currently loaded on drives must have a cell available when they are unloaded
from the drive.
v Never insert cartridges into empty cells or move cartridges around in the library
unless the Inventory Update function is enabled. Unless these cells are scanned
on returning to Automatic Mode, the Library Manager will not be able to tell which
cartridges have been added or moved.
v Never fail to save the logical volumes associated with a VTS during a
Re-inventory Complete System unless they truly need to be deleted.
v Never leave Manual Mode until mounts that were started (cartridges that were
physically placed in the feed slot of a drive) have been cleared from the Manual
Mode panel.
v Never place Exported Stacked Volumes in the High-Capacity Input/Output Facility
or into free cells in the library. This would cause them to be inserted as scratch
volumes, and the data on them would be permanently lost.
v Never load a drive without being told to do so by the Library Manager (which
only occurs in Manual Mode). If you need to load a cartridge without entering it
into the library database, use the Mount From Input Station function.
This section gives a list of actions you should avoid when operating a 3494, but
whose consequences are less serious than those in the list above. Failure to follow
these recommendations may still cause significant performance degradation.
v Avoid leaving the Convenience Input⁄Output Station door open. After several
minutes this will result in an operator intervention being sent to the host
indicating the Convenience Input⁄Output Station door is open.
v Avoid running with the library completely full. Running with a full library makes it
impossible to insert any more cartridges into the library and results in cartridges
being left in the I/O stations (Convenience and High-Capacity). It may also hinder
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