Background

The DRX instrument is too old to run a modern version of topspin, which in turn means it runs an old linux OS that cannot be on the college network.

To manually claim experiments run on this machine, we have set up ch-nmrserv-bridge - a AlmaLinux9 machine that is both on the VLAN with the DRX (via a USB -> Ethernet converter plugged into the wall in the office), and on the college network (via the built in ethernet network card, plugged into the wall in the office).

Accessing data

The NOMAD client is running on ch-nmrserv-bridge with the config set up as if it were the DRX instrument machine.

The directory /opt/topspin/nomad-manual/data on the DRX instrument machine is mounted to opt/topspin/nomad-manual/data on ch-nmrserv-bridge. That way, manual claims work as normal through the NOMAD server.

Mounting the directory after system restart

If ch-nmrserv-bridge restarts:

umount /opt/topspin/nomad-manual/data   # attempt unmount so the next step works cleanly
mount -a   # mount all volumes in /etc/fstab

NOTE: sudo is not needed on this machine and using it may cause an error. This is due to the SSH setup being configured for the nmrsu user only.