Can elaborate on what kind of machine you're backing up and what kind of data? Mine is our domain server which is also our exchange server. I'm only backing up roaming profile data (profiles, appdata, desktop, mydocs) and a "homes" folder that contains each users' network drive (for data they want backed up). Like I said earlier, it doesn't always happen, but here is the error I got the last time it got stuck in the loop:

Backup- \\Server\D: New VolumeAOFO: Not enough disk space on the device running the Advanced Open File Option (AOFO) to create or increment the cache file.
To increase the initial size and maximum size of the cache file, use the AOFO Wizard on the Tools | Wizards menu.
Optimum settings for your computer will vary.
V-79-57344-37907 - Snapshot error during backup. Set has been canceled.

Verify- \\Server\D: New VolumeUnexpected end of backup set encountered on Server-Daily.
V-79-57344-34004 - End of data set was unexpectedly encountered.

I know the cache file is big enough. I have the settings set on initial size 5% and max size 60%. The drive has about a terabyte free so I don't think the cache file is reaching 600 gigs unless the infinite loop is causing it. Maybe we can troubleshoot this together and figure out what our problem is.

Ah I see. I was able to look at the log file using command line as you did and here is the first line of the error message up to the repeating "connection lost" message:

</display_contvcb><OperationErrors Type="error">Unexpected end of backup set encountered on Server-Daily.
</OperationErrors><OperationErrors Type="error"><UMI>V-79-57344-34004</UMI> - End of data set was unexpectedly encountered.
</OperationErrors><OperationErrors Type="comm_failure"><UMI>V-79-57344-65072</UMI> - The connection to target system has been lost. Backup set canceled.
</OperationErrors><OperationErrors Type="error">An inconsistency was encountered on the storage media in Server-Daily.
</OperationErrors><OperationErrors Type="error"><UMI>V-79-57344-33994</UMI> - The data being read from the media is inconsistent.
</OperationErrors><OperationErrors Type="comm_failure"><UMI>V-79-57344-65072</UMI> - The connection to target system has been lost. Backup set canceled.
</OperationErrors><OperationErrors Type="comm_failure"><UMI>V-79-57344-65072</UMI> - The connection to target system has been lost. Backup set canceled.

etc, etc..

It has happened 2 times in a row now. However, I was able to run another job that does an incremental on Sunday that completed with exceptions; something about quiet time, an error I've had before and I'll solve again later. The daily backup failed the same way on Friday night and Monday night.

 Anyway, one thing I can remember about the server in question is that I had to manually install the remote agent and AOFO on the server because when I tried to do it remotely it said "access is denied" even though I tried doing it as the domain administrator.

After looking at the server event logs, each time it goes into that loop it has crapped out on a file saying:

"The operating system returned an unusual error while backing up the following file:

 \\server\\file.whatever

 It is possible that this file is incomplete and therefore should not be restored. "

It's a different file each time too.


I searched the net for the error message and came up with this:

http://seer.support.veritas.com/docs/277891.htm

According to that link:

"According to MS articles 312362 and 304101 this error is caused by a lot of files opened (more than the cache manager can handle) and as a consequence the cache manager has exhausted the available paged pool memory. By default the memory manager tries to trim the allocated paged pool memory when it reaches the 80 percent of the total paged pool. Lowering this threshold from 80 percent down to 40 will avoid those situations where the memory manager is struggling to keep up with the paging demand."

This may or may not be our problem because the error message they show is in backup exec while my error message is on the servers' application event log.

Do you run any local backups on the server using ntbackup.exe? I am backing up (exchange, C drive) (locally) using it at the same time backup exec is running but they aren't backing up any of the same files.

It could be a VSP error as well. Do you use any AOFO options?

See this thread also: https://forums.symantec.com/syment/board/message?b...

Obviously we have the same error message, probably for the same reason. If we can figure out what our setups have in common maybe we can find out exactly what is causing the problem!

So it only happens when you run full backups? Hmm... are you backing up a lot of small files? I mean, lots of ~1kb files.

So last night, the actual backup ran fine but the copy to the off site backup to disk folder had that infinite loop problem again with the same error message.

After each daily backup finishes, we encrypt and copy the backup to an external USB HDD that is taken off site each day. I noticed that the copy going to the off site backup was actually bigger than the original backup when I canceled it. The original backup was 27 gigs while the offsite backup was at 43 gigs when I canceled it.

Message Edited by David Bond on 10-25-2007 10:28 PM

Excellent, so, can we get a symantec employee to help us on this one? Since there's obviously a bug with the program (at least, that's what conclusion I have come to from the information we have gathered) I hope we can get some help.

Bump.

Bump, any symantec employee response on this?

bump

So I deleted that encrypted copy backup from the template, and it ran fine for a few days, so I re-added it. It's currently working great. Have you tried deleting the copy part from the template, then re-adding it?

Message Edited by David Bond on 11-06-2007 06:50 AM

Ouch! I haven't had it happen since I re-created that part of the template. I doubt we'll get this resolved unless one of us goes to paid support unfortunately :(