Folders disappear after ntbackupLocked
Something weird’s been going on in my workplace. I backup using Microsoft native ntbackup on a win 2003 server. The tapes I use are dds4 and 20gb uncompressed capacity. Recently the data rose to above 20gb so i enabled compression in order to fit my data unto the tapes. Sudenly I realised I was loosing data, and not all the data at the same time. In place of my folders, i finfd empty folders always starting with the letters sv??9.tmp, sv?4?.tmp ( and all ending with a .tmp extension. i have since split the backup to go on 2 tapes and disabled compression, but no luck. More and more of these .tmp folders are replacing my folders.
Please is this a kind of virus I am unaware of or just something I have done wrong. I am using Sophos antivirus on all my servers and this behaviour is occuring on only 1 server(windows 2003)