Minicom Advanced Systems CMG-DCM manual Gnblocks port-number

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CMG-DCM

3.Connect the NETWORK socket to a computer as described in Section 2.4, “Connecting to a local network” and perform any necessary

configuration of the DCM and digitizer. You will be prompted for a username and password: log in as root and use the password supplied by Gü ralp Systems.

4.The DCM will immediately begin recording data into Flash memory as it is received, and every so often data will be moved onto the internal hard disk. At this point you can leave the DCM running without assistance.

Data is stored in the Flash memory as a number of files in Gü ralp Compressed Format (GCF) unless you have specified another option. Once the memory becomes 75% full, files are automatically moved to the hard disk until it is less than 50% full. (See Section 6.1, “File systems” for details of the algorithm used.)

You can check that the DCM is receiving data either by monitoring the Summary page of the on-board Web interface (see Section 5.7, “Summary”), or from a command prompt using the command

gnblocks port-number

to find the number of GCF blocks received so far on a port. To see the number of blocks recorded on all ports, type

gnblocks

5.If the internal hard disk is missing or becomes full, and you have chosen the USB host option, the DCM will automatically look on the USB interface for an external USB mass storage device.

6.To replace the internal hard disk, unclip the cover of the DCM and hold down the lever button to bring the disk out from its housing.

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Contents CMG-DCM Table of Contents December Inside the DCM Introduction CMG-DCM Inside the DCM Serial port services Network servicesSee .4, Connecting to a local network for full details Power supply Installing the CMG-DCMOverview Connecting to a single computer Connecting over a serial linkConnecting over Ethernet 192.168.0.xUsing an internal modem Connecting over USBConnecting to a local network Gcfgdbset option-namenew-value Wi-Fi Connecting to the InternetConnecting digitizers and external hardware Setting up the CMG-DCMWeb 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 Can Gcfping the DCMs Scream! server, but no data appears DCM is not receiving any data streamsUse the Serial port configuration → port name Web page, or DCM is receiving streams, but they do not contain any data143032 up 34 min, load average 1.24, 1.32 Configuration options GeneralDisk CMG-DCM Serial port configuration CMG-DCM Page Network configuration Ethernet portStatic routes DNS setup Incoming mail setup Outgoing mail setup Remote access Administrators PPP Mgetty Data transfer ScreamScream! Client AutoDRMHttp client Http serverCD1.0 CD1.1 CD1.1 subframe configuration DSS Server configuration Seed Page CMG-DCM Actions Data ViewerIcon bar Stream listDigitizer Setup General digitizer settings Digitizer output control CMG-DCM Trigger criteria CMG-DCM Tap # Rate Bandwidth Samples/s Auxiliary Mux channels Sensor mass control Check disk filesystem Disk toolsPartition, and format disk Flush flashCamera Disk filesRecent Log Entries Network configuration SummaryDNS configuration Data Out Port, Serial Port A, Serial Port BTamper lines Flash StatusDisk Status Software Versions Inside the DCM File systems CMG-DCM Command line tools Configuration Digitizer console access Monitoring Data flowDigitizer status Tamper lines From the hard disk Updating the DCMOver the Internet Removing support packagesFirmware Libgconfigdb Port a and B Appendix a Connector pinoutsAppendix A.1 Modular DCM units Data OUT portUSB connector Network connectorAppendix A.2 Integrated DCM units DM/AM module outputAppendix B Sensor and digitizer types Appendix B.1 Sensor response codesAppendix B.2 Digitizer type codes Digitizer