Data Loss - Pentek Talon RTX 2767 Operating Manual

Talon RTX 2767 Operating Manual
8.2 Play Channel Controls (continued)
8.2.13

Data Loss

The Data Loss indicator will light up red if data cannot be played back from
a file. If the Data Loss indicator is not lit, then all of the data was played
back successfully.
Data loss is flagged by the recorder when any condition that results in a dis−
continuity of the data stream occurs. The Talon recording system flags this
data loss in both the real−time status as well as in the recording's file header.
The file header also includes a field that contains the location of the last
good (contiguous) data recorded, so the operator can use the portion of the
recording that is still good.
Data loss can happen for a number of reasons. Any time that the storage
drives fail to keep up with the real−time stream of data from either A/D
converters or a digital interface will result in a real−time data loss. This
could happen if the system parameters are set up in a way that results in a
higher aggregate data rate to disk than the system can handle. The following
are other potential causes of data loss:
• In Talon RTS systems, the performance of the HDDs could be affected by
a momentary shock or an environment of high vibration, resulting in
data loss. (Talon RTR and RTX systems have SSDs, which are not
affected in this way.)
• An almost full or highly fragmented disk could result in data loss.
• Selecting the wrong drive to record each file to will often result in data
loss.
• Failure to apply an external clock when specifying one.
• Incorrectly setting up an external trigger.
• Specifying incorrect clock rates, decimation rates, bandwidths, or other
system settings.
The operator should consider all of these possibilities when observing data
loss and take care to create an environment that results in error−free record−
ing every time.
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