Re: [rdiff-backup-users] undo backup operation

[Giorgio]

Hi,

Il giorno 04/lug/09, alle ore 02:55, Steven Willoughby ha scritto:

> address@hidden wrote:
> > Hello, I have situation like this: Soruce folder (300 GB, Windows  
> > share mounted by cifs)
> > Backup folder (350 GB, backup + some increments, 500 GB disk quota)
> > I'm doing "rdiff-backup source backup" and everything is ok but  
> > unfortunetly I didn't do protection in my backup script in case of  
> > bad mount cifs source folder (source folder is empty after lost  
> > connection to the source server). Last night I've lost connection  
> > to server, rdiff-backup backed up this folder and now I have backup  
> > folder only containing rdiff-backup-data. I can do "rdiff-backup  
> > source backup" again but:
> > 1) all files from source will be copied to backup folder (this will  
> > take about 1 week :)
> > 2) backup folder will be 300 GB + 350 GB = 750 GB  but I only have  
> > 500 GB (I don't want to waste disk space on backup server)
> > Is there any way to undo last (or more) backup operation to avoid  
> > described problem?
>
> While rdiff-backup is making a backup it creates a new  
> "current_mirror.$timestamp.data" file in the rdiff-backup-data  
> destination directory.  Once it's done making the backup, it deletes  
> the old current_mirror file.  In other words, while the backup is  
> running there are two current_mirror files.
>
> In order to undo a backup, you'll need to to create a fake  
> current_mirror file with the timestamp of the previous backup and  
> run "rdiff-backup -v6 --check-destination-dir $dest".  rdiff-backup  
> will be fooled into thinking the latest backup failed and revert it.
>
> I do not know of a way to regress more than one backup at once, but  
> this method should work multiple times.

This is nice to know, but can't this procedure be added in the  
program? It sounds pretty easy to implement.

Regards,
Giorgio