Skip to main content
Have a request for an upcoming news/science story? Submit a Request

New Carter Scratch Filesystem

  • Announcements
  • Carter

We are seeing some issues with the systems in the warp-scratch set of hosts. You may encounter an error with your home directory and/or a message about permissions upon login. Even if you see this, you may find the system is still able to access both your scratch directories. However, sometimes this may not work. You may try logging in again, as this should direct you to a different transfer host which may be working better at the time.

Systems administrators are investigating these issues and will be correcting these as they are able to identify the problems.

Original Message:

The Carter cluster scratch filesystem, which had been suffering from numerous issues, has been replaced by an entirely new system today. Unfortunately, in order to put the new system into place quickly due to the ongoing issues, it was not possible to copy over all the existing files to the new system. However, these files are still available to all users.

You will find your $CLUSTER_SCRATCH directory on Carter is now a new empty directory. Your previous files may be accessed from a set of dedicated file transfer systems by SSH to "". There you will not only find /scratch/carter (your new scratch space), but also /scratch/carter-warp (your previous scratch space). Please copy whatever files you need from the old space to your new scratch or download them elsewhere if you prefer. We are trying to keep the old scratch filesystem available in this way for a few weeks to allow for file transfer.

A tool has been deployed on Carter front-ends to assist in transferring files:


If you need assistance in transferring files, please contact us at and we can provide instructions more specific to your situation.

We hope that this new filesystem will improve the overall stability and experience on Carter. Thank you for your patience as we have dealt with this problem.

Originally posted:
Last updated: