-----Zoltan Forray wrote: -----

>I am trying to backup a LARGE SQL (4TB) database via the SQL TDP,
>without success.
>
>It will run for a while and then die - usually with the error:
>ANS1017E (RC-50): Session Rejected : TCP/IP communications failure.
>The last try backed up 125GB before failing.
>
>I have greatly increased the server communication timeout (6000
>seconds) guessing it is a timeout issue.
>
>I know very little about the SQL TDP (v5.5.5.0 - base TSM client is
>6.1.3.2 - yes I know it needs updating) and config options.  Is there
>a way to breakup the backup into chunks, like you can do with Oracle
>backups?
>
>Suggestions?

Does the backup pass through a firewall? Firewalls generally have a
timeout period for idle TCP sessions. This is rarely more than an
hour, and I have heard of firewalls with the timeout set as low as
15 minutes.