Minimum Setup for Gentoo Real Time system

This setup can be extended to following systems;

setup front-end 12/15/2010 at 40m

Make a full copy of Alex HDD

  1. Obtain Alex HDD
  2. Do not forget to make a copy of the original HDD. Obtain Knoppix and type

    dd_rescue /dev/sda /dev/sdb


  1. Prepare following equipment;
    • PC for frontend (which has at least one PCIe slot, for example SUPER MICRO)
    • At least one GS ADC card
    • IO chassis (or put ADC into PC's PCIe slot directry)
    • Timing signal
      • Timing signal can be replaced by a function generator with 65536Hz, 5Vpp and 2.5V offset.
      • This timing signal has to be injected into the ADC card somehow.
    • Network router for private network.
  2. Connect all, and boot from Alex HD
  3. Login as root with CDS password, and set a password for controls.
  4. change controls UID to 1001, and controls GID to 1001 because all of the CDS files owned by controls account with UID=1001 and GID=1001. see

  5. Delete existing IP on /etc/hosts, and add new IP and host name like       standalone       desktop1
  6. Setting up network info. like IP or netmask etc at /etc/conf.d/net if you need.

If you need to PXE boot other HDD less PSs through network

  1. modify /etc/dhcp/dhcpd.conf to delete existing front-end and add new front-end PCs
  2. run dhcpd if not running as

    # /etc/init.d/dhcpd start

    or add dhcpd as default run level as

    # rc-update add dhcpd default
    and reboot.
  3. Boot up the TFTP server of master

    # /etc/init.d/in.tftpd start

    or add TFTP server as default run level

    # rc-update add in.tftpd default
    and reboot.

Trouble shooting

tftp can not be accessible from HDD less PC

cd /etc
grep -r diskless *
more /etc/conf.d/in.tftpd 

Start TFTP server

# /etc/init.d/in.tftpd start

If you need to start TFTP server automatically, add TFTP server as default run level

# rc-update add in.tftpd default

How to stop TFTP server from service

# rc-update del in.tftpd default

X windows cannot open through ssh

Delete registered hosts from .ssh/known_hosts

or try

ssh -Y hostname

emerge does not work

# emerge --sync

KAGRA/Subgroups/DGS/RTPC/GentooRTMin (last edited 2012-06-06 17:55:44 by OsamuMiyakawa)