Operator's guide
4.2 Disk
This page allows you to change how the DCM will use its hard disk, and what data it will record on it. If you want to check that the hard disk is working, explore its contents, or format it, you should use the Disk tools page instead (see below.)
The first three options allow you to specify formats in which the DCM should record data. There are three options: gcf, miniSEED and sac. The latter two are provided for archival purposes, and are not optimised for data transfer; Gür alp digitizers and software all work natively with GCF, the Gü ralp Compressed Format. The DCM allows you to record in several formats simultaneously, if you wish; you should make sure that you have the capacity to store, or the bandwidth to transfer, all the data the DCM will produce in each format you have enabled.
One file will be prepared for each format (or format and stream, for those formats which deal with single streams) every three hours. The DCM will always start a new file if it is power cycled; the aborted file will still be valid. Files are not immediately written to the disk, but into Flash memory; the options disk.usagemode and disk.writeinterval, below, control how often the DCM flushes new data to the disk, and what it will do if the disk becomes full.
disk.recordas.gcf : Set this to yes to have the DCM record Gü ralp Compressed Format data files.
disk.recordas.miniseed : Set this to yes to have the DCM record files in miniSEED format.
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