Our home and research fileservers use ZFS to store the data.
To access these snapshots in Linux, goto Location in Computer and fill in URL as: sftp://{groupfs}//research/.zfs/snapshot/ . You will find snapshot names labeled with auto-{year}{month}{day}-{hour}{minutes}{seconds}: eg. auto-20140903-160000 taken at 2014 September 3th @ 16h. Just click on the snapshot and you can see your username listed, where you can find the backup.
{groupfs} is the name of the fileserver from your research group e.g. ddcmfs,digcomfs,gaimfs,ipifs and smacsfs.
There is an automatic cleanup running for older snapshots, after 7 days only 1 a day is kept and after 14 days only 1 a week.