Page 44
DTL-960e Single Channel Colour Digital Video Recorder
User Manual
DATA TRANSFER OPERATIONS
Play from Tape Mode
If more than one volume is found, a list of available volumes is displayed. The loaded volume is selected by default.
Selecting a volume deselects the previously selected volume.
When a volume has been selected, and the menus have been exited, pressing the
SEARCH
button displays (1) the
selected events on the disk, and (2) the free capacity of the selected volume.
Pressing the
ENTER
button plays back an event from the
Restore Search Results
screen. If the selected tape is not the
tape in the drive, the other tapes in the magazine are loaded in succession until the matching tape is found. If no matching
tape is found, nothing is played back. Do not cancel a search, or start another search, while the autoloader is unloading
or loading tapes.
Background Archive Mode
If the Autoloader is being used with a single tape in Slot 8, the Autoloader functions as a singletape drive. The tape is
unloaded when full regardless of the background archiving setting.
If more than one tape is used, all tapes in the magazine are searched to find the most recent event. If all the tapes are
blank, Tape 1 is selected.
During background archiving, the
Archive Percentage
and
Time Left
parameters indicate the estimated time left for the
magazine, not just for the current tape. Information is written until the EOM in encountered. This may be slightly greater or
less than the reported tape capacity. The remaining time left is recalculated when the next tape is loaded to overcome this
difference. If a loaded tape is write protected or not usable, the archive time is adjusted accordingly when the next tape is
loaded.
Note:
When background archiving is active, certain tape functions are not available, such as
Erase Archive Medium
. In
order to erase a tape, switch background archiving off. See page 26 for details on how to do this.
There are three different overwrite modes that can be used with an Autoloader, and these modes should be considered
when background archiving is used. These modes are:
No Overwrite
The Autoloader finds the tape with the most recent recorded event, and the next tape in sequence is then selected as
the starting point. When that tape becomes full, the magazine is sequentially searched for a tape with free space. If
one is found, it is loaded and archiving continues. Otherwise, the magazine is ejected, and another magazine must
be inserted. The magazine changeover operation may take a number of minutes to perform, in which case some data
may be lost.
Overwrite Once
The tape with the most recent recorded event is found, and the next tape in sequence is selected as the starting point.
This tape is loaded and erased, so that archived information starts at the beginning of the tape. The
Archive Percentage
and
Time Left
parameters then indicate the remaining capacity of the magazine. When these decrease to zero, all the
tapes in the magazine are full, and the magazine is ejected, at which point another magazine must be inserted. The
magazine changeover operation may take a number of minutes to perform, in which case some data may be lost.
Continuous Overwrite
This mode operates in the same way as Overwrite Once
mode, but when all the tapes in the magazine are full, the
cleaning tape is loaded and run. The operation recycles until archiving or recording is turned off. The magazine is not
ejected in this mode.
For more details on archive overwrite modes and on archiving in general, see page 25 and 26.
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