Skip to main content

Data Collection System Troubleshooting

Experiment Storage Folders Inaccessible

The experiments are stored in /data/cat on the CAT server, and /data/tom on the TOM server, both of which should be accessible through NFS protocol on the TOM and CAT server computers as well as Lion, Tiger, Leopard, and Cheetah iMacs. If the experiment storage folders /data/cat and /data/tom are inaccessible, there are 2 main causes:

  1. RAID0 memory is not mounted on /data/cat on CAT computer, and /data/tom on TOM computer.
  2. NFS mount has not been established between the computers and the iMacs.

Mounting RAID0 Drives

CAT computer has multiple hard drives installed: one hard drive for hosting the Ubuntu operating system, and the other two hard drives are combined using RAID0 protocol. The RAID0 memory location is /dev/md0 and needs to be mounted to /data/cat. To do so, run the following command in the terminal of CAT computer (might need sudo to have permission for mounting):

mount /dev/md0 /data/cat

In the situation where the /data/cat mount is stale, unmount it with

umount /data/cat

and then re-mount /dev/md0 to it using the mount command above.

Similarly for TOM computer, the commands are the same, simply replace cat with tom in all the commands above.

Mounting NFS Drives

NFS is a file-sharing protocol that allows other computers to access a folder of another computer. We need to allow all lab computers and iMacs to have access to /data/cat and /data/tom on CAT and TOM computers respectively.

To give TOM computer access to /data/cat, we mount /data/cat on CAT computer to the folder /data/cat on TOM computer. Let 192.168.0.25 be the local IPv4 address of CAT computer in the network, run the following command on TOM computer (might need sudo to have permission for mounting):

mount -o rw -t nfs 192.168.0.25:/data/cat /data/cat

Similarly, to give CAT computer access to /data/tom, we mount /data/tom on TOM computer to the folder /data/tom on CAT computer. Let 192.168.0.24 be the local IPv4 address of TOM computer in the network, run the following command on CAT computer:

mount -o rw -t nfs 192.168.0.24:/data/tom /data/tom

In the situation where /data/cat or /data/tom mount is stale, unmount it with the umount command (see the command in the section above), and then re-mount using the mount command in this section.

Back to top