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On 05/12/14 19:20, Dimitri Maziuk wrote:
> On 12/05/2014 07:48 AM, Daniel Pocock wrote:
> 
>> The purpose of such a checksum wouldn't be to prove that the
>> tapes are correct, it would simply be to catch any failure of the
>> spool disk at the earliest opportunity
> 
> Monitoring your hardware is not bacula's job. Appropriate tools for
> this particular job include smartctl, fsck, and checksumming
> filesystems.
> 

Quite a number of applications keep checksums within their own file
formats.  gzip is one of them, while tar is not.  A tgz file is
therefore more secure than a tar file alone.

smartctl and fsck will not always know if bits are written incorrectly
within the data of a file.  fsck will only notice if the corruption
has occurred in the filesystem metadata but not in the file content.
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