[Box Backup] BadBackupStoreFile

[Ben Summers]

On Thu, 30 Aug 2007, Chris Wilson wrote:
>> Another feature request: The backup server should (additionally)  
>> store
>> checksums across large blocks of files, e.g. 1MB blocks. Then only  
>> these
>> checksums need to be read from disk instead of the whole backup file.
>>
>
> I have a feeling that we already do, but I'm not 100% sure. Ben, do  
> you
> know?

Checksums are per-block, encrypted. The block size depends on the  
size of the file. You can do a compare using the checksums only using  
the -q option, and only the checksums are read from disc and  
transferred over the network.

Ben