Requesting shared /mnt disks in HTCondor jobs

Since 7 September 2026, HTCondor jobs no longer get automatic access to the shared disks under /mnt/. Each job must explicitly request every /mnt/ folder it needs. /home is not affected by this change and remains available to every job as before.

This applies to both plain jobs and jobs running inside a container image.

How to request a folder

Add one line per folder to your submit file:

+<name> = true

<name> is the last part of the folder’s path under /mnt/. For example, to access /mnt/nfs22_auger, add:

+nfs22_auger = true

Example

A job using a container image that needs nfs17 and users_private:

+SingularityImage = "/cvmfs/farm.particle.cz/singularity/fzu_wn-centos8"
+nfs17 = true
+users_private = true
queue

Available folders

Name to request	Path available in the job
nfs17	/mnt/nfs17
nfs17_cache	/mnt/nfs17_cache
nfs19	/mnt/nfs19
nfs22_auger	/mnt/nfs22_auger
nfs25_auger	/mnt/nfs25_auger
nfs26_auger1	/mnt/nfs26_auger1
nfs27_auger1	/mnt/nfs27_auger1
nfs27_auger2	/mnt/nfs27_auger2
nfs27_auger3	/mnt/nfs27_auger3
nfs28_auger1	/mnt/nfs28_auger1
nfs28_auger2	/mnt/nfs28_auger2
nfs28_auger3	/mnt/nfs28_auger3
sst1m_cs1	/mnt/sst1m_cs1
sst1m_cs2	/mnt/sst1m_cs2
users_private	/mnt/users_private

Need a folder that isn’t listed here, or unsure which name matches what you used to use? Contact [add contact].

What happens if you forget a folder

A job that doesn’t request a folder does not get an error — the folder simply appears empty inside the job. If a job that used to read or write under /mnt/ suddenly finds nothing there, check that the corresponding +<name> = true line is present in the submit file.

concurrency_limits

You no longer need to set concurrency_limits yourself for these folders. It is now computed automatically from the +<name> = true lines in your submit file, and any value you set manually for it is overridden. If you don’t know what concurrency_limits is, you can ignore this section — it doesn’t affect you.

Please request only what you need

Each requested folder counts against a shared usage limit for that storage server, whether or not the job actually reads or writes to it. Requesting folders you don’t need can block other users from that storage.