I've been fighting this for weeks and I am totally buffaloed.
I have a Dell PowerEdge 2900 running Small Business Server 2008. I've been using Windows Server Backup with BackupAssist as a "front-end" for years. I have two nominally identical eSATA external enclosures, each with a Hitachi HDS724040ALE640 4 TB disk. I don't recall how long I've had these but it's been a while. I swap them out pretty much every day, and back up to the attached disk every day of the week.
A few weeks ago I added another 500GB to my PERC-6 RAID-5 array. At the same time I changed my backup strategy. I had the two external disks formatted with two partitions, one for the image backup and one for data from other servers. I decided to have only one partition and only do image backups but put the backups from the other servers into a folder on the main server so they wind up in the image.
Ever since then, if I unplug one of the disks (call it disk A) and plug in the other disk (call it disk B) and let the scheduled backup run, and then remove disk B, plug in disk A, and let the scheduled backup run, disk A winds up with only the most recent backup on it. Disk B, OTOH, accumulates backups as expected and as before the switch. And disk A accumulates multiple backups as long as it remains plugged in (e.g. over the weekend).
Both disks reports SMART data in the green. An intensive multi-day surface check with Victoria doesn't show an bad or even problematic sectors. I've reformatted many times, and deleted and re-created the partition a couple of times.
BackupAssist tech support can't figure out what's happening. I've tried to test with using WSB directly but I haven't come up with any useful results becasue I don't really understand how to set up a rotating-media backup in WSB. I've done various checks and repairs with wbadmin without any joy. It seems pretty unlikely that the problem is in BackupAssist becasue all it does is write a script then call WSB to execute it, and the script doesn't vary.
Help??
I have a Dell PowerEdge 2900 running Small Business Server 2008. I've been using Windows Server Backup with BackupAssist as a "front-end" for years. I have two nominally identical eSATA external enclosures, each with a Hitachi HDS724040ALE640 4 TB disk. I don't recall how long I've had these but it's been a while. I swap them out pretty much every day, and back up to the attached disk every day of the week.
A few weeks ago I added another 500GB to my PERC-6 RAID-5 array. At the same time I changed my backup strategy. I had the two external disks formatted with two partitions, one for the image backup and one for data from other servers. I decided to have only one partition and only do image backups but put the backups from the other servers into a folder on the main server so they wind up in the image.
Ever since then, if I unplug one of the disks (call it disk A) and plug in the other disk (call it disk B) and let the scheduled backup run, and then remove disk B, plug in disk A, and let the scheduled backup run, disk A winds up with only the most recent backup on it. Disk B, OTOH, accumulates backups as expected and as before the switch. And disk A accumulates multiple backups as long as it remains plugged in (e.g. over the weekend).
Both disks reports SMART data in the green. An intensive multi-day surface check with Victoria doesn't show an bad or even problematic sectors. I've reformatted many times, and deleted and re-created the partition a couple of times.
BackupAssist tech support can't figure out what's happening. I've tried to test with using WSB directly but I haven't come up with any useful results becasue I don't really understand how to set up a rotating-media backup in WSB. I've done various checks and repairs with wbadmin without any joy. It seems pretty unlikely that the problem is in BackupAssist becasue all it does is write a script then call WSB to execute it, and the script doesn't vary.
Help??