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Entry  Wed Aug 1 16:23:48 2018, Koji, Summary, Computers, Transition of the main NFS disk on chiara 
    Reply  Wed Aug 1 19:41:15 2018, gautam, Summary, Computers, RTCDS recovery, c1ioo changes CDS_overview.png
       Reply  Wed Aug 1 20:44:57 2018, gautam, Summary, Computers, c1omc model (re?)created CDS_OVERVIEW_withOMC.png
          Reply  Thu Aug 2 20:54:18 2018, gautam, Summary, Computers, c1omc model looks stable 
       Reply  Thu Aug 2 20:47:29 2018, gautam, Summary, Electronics, X Green "Mystery" solved 
          Reply  Thu Aug 2 23:09:25 2018, rana, Summary, Computers, X Green "Mystery" solved 
          Reply  Fri Aug 3 14:35:56 2018, gautam, Summary, Electronics, EX AUX electronics power restored 
    Reply  Mon Aug 6 09:42:10 2018, Koji, Summary, Computers, Transition of the main NFS disk on chiara 
Message ID: 14121     Entry time: Wed Aug 1 16:23:48 2018     Reply to this: 14122   14138
Author: Koji 
Type: Summary 
Category: Computers 
Subject: Transition of the main NFS disk on chiara 

[Gautam Koji]

Taking the opportunity to shutdown c1ioo for adding a DAC card, we shutdown chiara and worked on moving of the main disk to the bigger home.

We shutdown most of the martian machines including the control machines, megatron, optimus, and nodus.

- Before shutting down chiara, we ran rsync to make the 4TB disk (used to be teh backup) and /cvs/cds synced.

sudo rsync -a --progress /home/cds/ /media/40mBackup

- Modified /etc/fstab

proc            /proc           proc    nodev,noexec,nosuid 0       0
# / was on /dev/sda1 during installation
UUID=972db769-4020-4b74-b943-9b868c26043a /               ext4    errors=remount-ro 0       1
# swap was on /dev/sda5 during installation
UUID=a3f5d977-72d7-47c9-a059-38633d16413e none            swap    sw              0       0
UUID="90a5c98a-22fb-4685-9c17-77ed07a5e000"    /media/40mBackup       ext4      defaults,relatime,commit=60       0         0
#fb:/frames      /frames nfs     ro,bg

UUID=92dc7073-bf4d-4c58-8052-63129ff5755b   /home/cds    ext4    defaults,relatime,commit=60    0   0

- Shutdown chiara. Put the 4TB disk in the chassis. We also installed a new disk (but later it turned out that it only has 2TB...)

- Restart the mahcine. This already made the 4TB disk mounted as /cvs/cds .

- Restart bind9 with DHCP for the diskless clients (cf. https://wiki-40m.ligo.caltech.edu/CDS/How_to_join_martian)

sudo service bind9 restart
sudo service isc-dhcp-server restart

- Looks like /etc/resolv.conf is automatically overwritten by a tool or something everytime we restart the machine!? I still don't know how to avoid this. (cf.  https://www.ctrl.blog/entry/resolvconf-tutorial). But at least for today we manually wrote /etc/resolv.conf

controls@chiara|backup> cat /etc/resolv.conf
# Dynamic
resolv.conf(5) file for
glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 192.168.113.104
nameserver 131.215.125.1
nameserver 8.8.8.8

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