Guralp Systems CMG-DCM build <10,000 - Manual (Page 110)

CMG-EAM (Platinum Firmware)
10.2.1 Configurable parameters in standard mode
The following configuration options are available from the “simple”
dialogue:
●
Disable all recording. This check-box, when ticked,
unconditionally disables all recording.
●
Recycle files – If this check-box is ticked, gdi­record will
remove the oldest files from external storage to make room for
new data when the external storage becomes full. If this option
is cleared then, when the storage becomes full, the module will
check periodically for free space and start writing again when it
can.
●
In order to reduce power consumption, gdi­record does not
write continuously to the hard drive. Data are buffered in flash
memory and, at a configurable interval, these data are checked
to see which complete files can be written to disk. The Check
output flush option controls how often this happens. The
options are every minute, every five, fifteen or thirty minutes
and every hour.
●
The Recording destination drop-down menu controls where
data are stored. The options may include one or more of:
●
“Removable USB disk in internal tray” - this is the
default setting for CMG_EAMs and CMG-DCMs. Data
are written to the removable USB/FireWire disk and
can be read via the web interface, the command line or
by removing the disk and attaching it to an external
USB or FireWire host, such as a laptop.;
●
“External USB drive on mil-spec connector” - data will
be stored on external media, which should be attached
to the USB connector. The rdisk daemon handles the
required operations for mounting and un-mounting the
fie-system;
●
“Internal USB storage” - for authenticated digitisers
only, data can be stored on internal USB-accessible
flash memory. It can be retrieved by a USB host (such
as a laptop) connected via the GPIO connector. See
section 14.2.3.1 on page 196 for more details;
●
“Ring buffer on flash module” - some systems are
equipped with an external flash module to extend the
110 Issue C