Each user is allocated an initial disk quota along with their userid.
This places limits on the amount of disk space a user's files can
occupy as well as the number of files a user is permitted to own.
Both soft and hard limits are defined. If usage exceeds
the soft limit further file creation is permitted for a grace period
of 7 days beyond which any attempt to create a new file will fail.
Exceeding the hard limit results in immediate failure of all further
file creation or expansion until usage has been reduced to an
acceptable level. The system will issue a warning whenever an attempt to
write to a file is denied due to a quota violation.
The current default initial limits are as follows:
In addition there are quota limits set on mail files:
- Disk usage (soft) - 50 Mb
- Disk usage (hard) - 55 Mb
- No. of files (soft) - 5000
- No. of files (hard) - 5500
The 10 Mb limit on the mailbox is intended solely to allow for transient
high levels of traffic. It is strongly recommended that this file is kept
below 1 Mb in size (and, if possible, below 0.5 Mb) in order to avoid
rejection of incoming mail.
- Incoming mailbox (soft) - 10 Mb
- Incoming mailbox (hard) - 20 Mb
- IMAP folders (soft) - 5 Mb and 500 files
- IMAP folders (hard) - 6 Mb and 600 files
If you have a justifiable reason for requiring an increase in your quota
allocation please contact the DPO Computer Operators.
Use the quota command to obtain detailed information about your disk usage and
For further information about the quota command and some disk
tidying hints click here.
[University of Cambridge]
Updated on 15th April 2005 Stephen Mounsey, firstname.lastname@example.org