Recently, our netware server admin resigned and I'm stuck having to keep the servers going, having no prior experience, so bear with me.

Our backup started failing recently due to insufficient space on the backup tapes (40gb on tape, 60gb data on the server). I was looking at the files and noticed in the /etc/proxy/cache/ directory there are a huge amount of files, ~400k, roughly half of all the files on the server. What are these files for? Can I safely delete them all? They're all organized in sequentially hexadecimal-numbered directories, each containing roughly 6,000 files with .aaj extensions, also hex-named.

They all seem to be dated within two years of the server installation, 2005-2007. At the very least I should be able to safely exclude them from the daily backup, perhaps keeping a single copy of them as well if necessary.