Minicom Advanced Systems CMG-DCM manual Data storage and retrieval

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Operator's guide

When you are done, click Configure instrument to submit the changes to the digitizer and reboot it.

For full details on the configuration options available, see the documentation for the DCM or the digitizer. You can also configure digitizers from within Scream!, if you enable the DCM's Scream! server (see “Real-time data transmission” in Section 3.4.)

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 Disk menu of the DCM's Web site.

You can list the files on the hard disk

•

•

over the Web, by selecting 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: simply click its name to download the file.

Alternatively, you can remove the internal hard disk physically, 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.

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Contents CMG-DCM Table of Contents December Inside the DCM Introduction CMG-DCM Inside the DCM Network services Serial port servicesSee .4, Connecting to a local network for full details Power supply Installing the CMG-DCMOverview Connecting over a serial link Connecting to a single computer192.168.0.x Connecting over EthernetConnecting over USB Using an internal modemConnecting to a local network Gcfgdbset option-namenew-value Connecting to the Internet Wi-FiSetting up the CMG-DCM Connecting digitizers and external hardwareWeb setup Setting up digitizers Using Scream General notes UsageDCM as a data store Gnblocks port-number Page CMG-DCM DCM as a GCF data source Accessing the DCM command line through gcfout Sensor arrays DCM as a network data hub Communicating with digitizers Configuring digitizers Data storage and retrieval Using miniSEED format Real-time data transmission CD1.0 and CD1.1 Troubleshooting DCM installations Cannot connect to the DCMs Scream! server Cannot see the DCMs Web site over Http or HttpsCannot Gcfping the DCMs Scream! server DCM is not receiving any data streams Can Gcfping the DCMs Scream! server, but no data appearsDCM is receiving streams, but they do not contain any data Use the Serial port configuration → port name Web page, or143032 up 34 min, load average 1.24, 1.32 General Configuration optionsDisk CMG-DCM Serial port configuration CMG-DCM Page Ethernet port Network configurationStatic routes DNS setup Incoming mail setup Outgoing mail setup Remote access Administrators PPP Mgetty Scream Data transferAutoDRM Scream! ClientHttp client Http serverCD1.0 CD1.1 CD1.1 subframe configuration DSS Server configuration Seed Page CMG-DCM Data Viewer ActionsStream list Icon barDigitizer Setup General digitizer settings Digitizer output control CMG-DCM Trigger criteria CMG-DCM Tap # Rate Bandwidth Samples/s Auxiliary Mux channels Sensor mass control Flush flash Disk toolsPartition, and format disk Check disk filesystemCamera Disk filesRecent Log Entries Summary Network configurationData Out Port, Serial Port A, Serial Port B DNS configurationTamper lines Flash StatusDisk Status Software Versions Inside the DCM File systems CMG-DCM Command line tools Configuration Digitizer console access Data flow MonitoringDigitizer status Tamper lines Removing support packages Updating the DCMOver the Internet From the hard diskFirmware Libgconfigdb Data OUT port Appendix a Connector pinoutsAppendix A.1 Modular DCM units Port a and BNetwork connector USB connectorDM/AM module output Appendix A.2 Integrated DCM unitsAppendix B.1 Sensor response codes Appendix B Sensor and digitizer typesDigitizer Appendix B.2 Digitizer type codes