I'm currently running Server 2k3 with Backup Exec 10. My backups have started failing intermittently and it seems to be happening every 2 or 3 days. The server uses SQL for a medical software program (MDS Primesuite). I'm not sure why, but the backups isn't actually starting according to the schedule. I have the "Time Availability" selection disabled. The scheduled run is scheduled to start between 12:00am and 12:10am and has a maximum run time of 10 hours (normal backup takes about 5 hours for around 40GB on a DAT72). On the job history, Backup Exec doesn't show the backup of the C: drive (first in the list of priority to backup) beginning until nearly 6am (a full 6 hours after it should have already started).
I'm going into the office today when everyone goes home early to try and resolve this issue. So far from my research I can guess that the issues may be...
1) Possibly related to A/V scans from Kaspersky that are getting in the way at night.
2) Possible append issue with tapes - tapes are only 36GB/72GB and with backups being around 40GB with not much compression, the tape may be having to rewind itself mid-backup. There may be something to do with not being able to write over the tape again for a couple of hours.
3) I'm pretty sure they do not have an exchange server, but it's possible they do, and if I see Exchange running then I am going to make sure that they do NOT have a brick level backup selected.
As a note... all of the backups typically run around 200-250MB/second in every part of the job log. Even when the backup doesn't start on time the data transfer rates are pretty consistent.
About a month or two ago we were running into issues with the tape drive no longer backing up anything. After trying some steps with Dell over the phone, we decided that the drive was probably bad and Dell came out to replace the tape drive. The backups were working good for about a month and then the intermittent fails came again.
I really need help on this one as I can't for the life of me think of anything else besides calling Dell/Veritas to solve this issue.