Guralp Systems CMG-DCM build <10,000 - Manual (Page 111)

Operator's Guide
storage capacity beyond that available on the normal
file-system. Data written here are accessible via the
web interface or, from the command line, under the
path /media/flash_module;
●
“Record files under /var/spool/recdata” - this is the
only option on CMG-NAMs and CMG-NAM64s and it
is not available on other platforms. Data are written
directly to the internal hard drive and are accessible
via the web interface or, from the command line,
under the path /var/spool/recdata.
10.2.1.1 GCFraw Options
GCFraw is the native recording format of Platinum firmware. It can be
read directly by Scream! and other GSL software packages are
available for converting it into other formats.
GCFraw recording is enabled by default. To disable it, select the
Disable GCF recording check-box.
GCF files contain data from all streams and can grow quite large. The
data are split into manageable chunks on the basis of sample times. By
default, every thirty minutes the current file is closed and recording
recommences to a new file. This interval can be changed using the
File period drop-down. The options are 15 or 30 minutes and 1, 2, 3,
4, 6 or 12 hours.
Extra options are introduced to this screen by pressing the “Expert”
button. These include file name format control for GCF and
miniSEED. See the following section for details.
10.2.1.2 Mini-SEED Options
For some applications, it is more convenient to store the data directly
in mini-SEED format. The third section of the “Disk data recording”
page controls options related to recording in this format. If recording
in mini-SEED format is enabled, a GDI Mini-SEED compressor
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