Guralp Systems CMG-DCM - Manual (Page 34)

CMG-DCM Data Communications Module
the command
gcli port-number command
In these commands, port-number is the port number and port-
name the port device name to send the command to. To find out these,
issue the command serialmap:
Library version: libserialmap Version 1.0.5 with LIBGCONFIGDB
3 serial ports
Port 0, Key 7000, name Data out port, device /dev/ttySA0, baud
115200
Port 1, Key 7001, name Port B, device /dev/ttySA1, baud 9600
Port 2, Key 7002, name Port A, device /dev/ttySA2, baud 19200
Each port will be listed, with its number ( e.g. 0), name (e.g. Data out
port), and device (e.g. /dev/ttySA0).
Data storage and retrieval
All data received by the DCM is periodically written from Flash
memory to the on-board hard disk. The time period used can be
configured from the Configuration – Disk page of the DCM's Web site.
You can list the files on the hard disk
•
over the Web, by selecting Tools – Disk files from the menu, or
•
from the command line with gfat32 ls
If you are using the Web page interface, each file appears as a link:
click its name to download the file.
Alternatively, you can physically remove the internal hard disk, and
attach it to any computer supporting either Firewire or the USB Mass
Storage Protocol. It will appear on the computer as an extra hard drive.
The DCM uses a journalling file system compatible with Windows'
FAT32, so you cannot lose or corrupt data by removing the hard disk,
even if the DCM is in the middle of writing to it.
Using miniSEED format
You can instruct the DCM to record data to Flash (and, later, its hard
disk) in miniSEED format by browsing to the Configuration – Disk
page and selecting yes for the disk.recordas.miniseed option.
34 Issue F