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Durham University

Computing and Information Services

File Storage

Personal File storage

Your home directory upon logging in is your personal file store (J: drive under windows). This is regularly snapshotted and backed up.

Departmental File storage

Under the /data/ directory you will find access to both MDS S: drives and other specialist data areas accessible from the existing Linux/UNIX service. MDS S: drives are made available to LDS as /data/Share_<deptcode> e.g. /data/Share_ITS and specialist data areas preserve their name from the  existing Linux/UNIX service e.g. /data/compchem/ or /data/ecrg

Local File storage

The local disk on an LDS machine is partitioned as follows by default:

  • 16G root filesystem, including /usr where additional software will be installed
  • 400M boot filesystem containing the linux kernel and boot loader
  • 4G var filesystem containing logs, transient data
  • The remainder of the disk (normally at least 60G) as /local where users can write to

/local is intended for temporary scratch space only, it is not backed up or guaranteed in any fashion. As it is local to the machine it is considerably faster than the networked file storage, so is often a good place to use for compilations (but ensure your source code is kept in your home directory or departmental share)

The filesystems /scratch, /opt and /usr/local are all mounted over the network. If you have local administrative rights on the machine, do not attempt to use any of these areas for software you compile.