Hi everyone,
Since I cannot find any useful information in Technet, I decided to post my questions here:
1. I use wbadmin to daily backup the system partition, using VSS Full Backup. As far as I concerned, each backup item would take approximately the same amount of space as the data it backed up. As you can see, the data need to be backed
up is about 220GB, and it's been backed up 18 times. But the total space18 backups take is only about 460GB. If this is Incremental backup, there's no doubt. But hey, this is Full Backup, isn't it? Can anyone explain this to me, please?
2. When the backup destination for the upper job is about to full, I've met 2 cases:
- The destination is full, and the server (which is a VM) will be freezed. The only way to make the VM running again is to remove the destination disk. In this case, we have a little down time, but at least we still have our backups.
- All the backups are wiped away, making space for the new one. We have no backups other than the latest one. I thought that wbadmin would just delete the oldest one to make space, not ALL my backups like that. But it DID, seriously :(
When I search for more info on Technet, there's nothing much: "If you are backing up to a hard disk or volume you can specify a deletion policy to determine whether backups should be deleted only when necessary to make space for additional backups or if they should be deleted after a certain number of backups have passed."
I can see that there's an option in the Shell that could do the trick: "wbadmin enable backup -allowDeleteOldBackups", but I'm not so sure that it will delete all the previous backups or not.
Any idea would be highly appreciated. Thank you!
