Re: [rdiff-backup-users] Re: rdiff-backup restore from read-only file system

[Kurt Yoder]

On Aug 17, 2006, at 7:52 PM, Andrew Price wrote:

> I've recently become the maintainer of a backup tool package which  
> uses
> rdiff-backup. In acquainting myself with the package I've noticed that
> this read-only filesystem bug is pretty much a brick wall when it  
> comes
> to backing up to CD-ROMs.
>
> I appreciate that this problem hasn't been solved in rdiff-backup yet
> but I was wondering if there are any safe workarounds for it. To be
> honest I was surprised there isn't a switch to turn off the logging to
> restore.log like --restore-read-only. But from reading this thread I
> guess the problem is more complicated to solve than that. Any pointers
> to workarounds would be most appreciated.

How about something like a "union file system". You mount the read- 
only version to a UFS. Any changes including restore.log would get  
logged to the writable branch of the UFS. When you're done, remove  
the UFS without writing the changes.

-Kurt