Error messages

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I'm receiving these messages over to concrete5 sites:

gillrd.com
gillcorp.com

Warning: session_start() [function.session-start]: open(/kunden/homepages/9/d315339365/htdocs/**/files/tmp/sess_a4e2f0a0d12e8e10cf16a4308f50c3fc, O_RDWR) failed: Disk quota exceeded (122) in /homepages/9/d315339365/htdocs/gillrd/concrete/startup/session.php on line 36

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /homepages/9/d315339365/htdocs/gillrd/concrete/startup/session.php:36) in /homepages/9/d315339365/htdocs/gillrd/concrete/startup/session.php on line 36
concrete5

I've adopted these sites, so wasn't here when they were built and not too familiar with concrete5 platform.

Temp and cache files have tons of files inside, potentially site may have been hacked?

Any advice would be great.

 
mlocati replied on at Permalink Reply
mlocati
The problem is that you reached the maximum disk space allowed by your provider (see the "Disk quota exceeded" error message).

You should free some space, or contact them for an upgrade of your disk space.
gillsensors replied on at Permalink Reply
Would it be ok to delete files in cache and tmp folder?
mlocati replied on at Permalink Best Answer Reply
mlocati
Yes, it should be safe to empty the application/files/cache and application/files/tmp directories.

But please take care of:
1. delete the directory contents only, not the directories themselves

2. don't delete the index.html files you may have in those two directories (that is, application/files/cache/index.html and application/files/tmp/index.html)
gillsensors replied on at Permalink Reply
Thank you