Thanks Vincenzo , our clients that are being backed up like this are all Windows 2003 Domain Controllers that are also acting as file servers with mainly user data/docs being backed up.There is also a SQL database on the server which gets re-indexed daily and although this isnt backed up by commvault , im not too sure if this could be affecting the size of the CJ. The data we have chosen to be backed up on these servers is quite small. On average about 1GB gets copied as part of an incremental backup. Not a whole lot of changes are occuring within that 1GB that gets backed up.
We only increased the size of the CJ on the D drive as if you delete and recreate the CJ on the C drive of a Domain Controller , it breaks AD replication until restored. We only back up one small directory on the C drive so we thought leaving the defualt CJ size on C would be fine. Most of the data that we backup is on the D drive.
Im hoping support will be able to analyse the logs that i sent them and tell me what caused the Full to occur. This problem is now occuring at quite a few sites
thanks , Duncan