Legacy SCRATCH File System of CoolMUC-2/3 Broken - Data Recovery

Linux Cluster Attended Cluster Node Housing

Dear users of the CoolMUC-2 and 3 systems at LRZ!

Update

Filesystem was unmounted November 9!

24.10.2024

On 14.10.2024 severe hardware failures occurred on the CoolMUC clusters (SCRATCH filesystem, switches) that affected the old SCRATCH file system (/gpfs/scratch/$PROJ/$USER).
As a mitigation, until end-of-life of CoolMUC-2/3, we have mapped the SCRATCH variable to SCRATCH_DSS (/dss/lxclscratch/.../$USER) also accessible now on CoolMUC-2.

Update: Our administrators managed to bring the filesystem back up in read-only mode:

/gpfs/scratch/ and /gpfs/work/ are mounted on lxlogin[1-4] and lxloginc2pap

Please do not use the $SCRATCH environment variable, rather absolute paths, e.g.,
/gpfs/scratch/<project-id>/<user-id>.

We cannot guarantee data integrity or completeness. Please save all relevant files as soon as possible.

We try to keep the filesystem alive and mounted until 8 November (12 pm noon).
After 8 November 12 pm, it will be permanently shut down.

Kind regards, LRZ HPC Systems and Services Team