Guralp Systems CMG-DCM - Manual (Page 91)

Operator's guide
Files are given names in the format
yyyyjjjThhmmss-wwwww-WWWWW-ssssssss.eee
where yyyy is the current year, jjj is the day of the year, hhmmss is
the start time of the watch, wwwww is the watch number, WWWWW is the
number of watches, ssssssss is an 8-digit serial number (for
uniqueness), and eee is an appropriate file extension for the format
used.
For file types which do not support multiple streams, and also for GCF
files if disk.recordsplit is enabled (see below), the Stream ID SSSSS is
also included. This produces names in the format
yyyyjjjThhmmss-wwwww-WWWWW-ssssssss-SSSSS.eee
disk.recordsplit : By default, GCF files saved to Flash memory contain
all the GCF blocks which have been received on the active ports.
Setting disk.recordsplit to yes instructs the DCM to look through the
incoming GCF data and save a separate file for each incoming stream.
If you enable disk.recordsplit, you should make sure the DCM does not
produce too many files: see above for details.
disk.heater : A heater is provided in the internal enclosure of the DCM
to bring the on-board hard disk up to operating temperature when
required. If you are using an on-board hard disk, you should set this
option to automatic and choose a suitable operating temperature
below. If you are not using an internal hard disk, you should disable
the heater by setting this option to off.
disk.temperature : The minimum operating temperature of the on-
board hard disk, in degrees Celsius. If you have set the internal heating
to automatic, you should enter a suitable operating temperature here.
The hard disk will not function properly below 0°C. With the heater
active, the DCM is designed to operate in ambient temperatures up to
40 degrees below zero.
6.4 SEED recorder
The DCM can compile full SEED volumes in real time. To enable this,
select
yes for the disk.recordas.seed option under Configuration – Disk
(see above.)
A configuration file, /etc/seed.cfg, is provided allowing you to
provide technical information about the streams to be recorded in
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