On 06/12/14 00:02, Cejka Rudolf wrote:
> Daniel Pocock wrote (2014/12/05):
>> Now it is in the bug tracker:
>> http://bugs.bacula.org/view.php?id=2111
> 
> "... Data corruption occurs on disks sometimes, e.g. the write to disk
> didn't record data correctly on the platter and any attempt to read
> it returns the corrupted data. This may just be 1 bit and it may only
> occur once in millions of writes but it is known to happen. ..."
> 
> You wrote just about disks first, so I responded just about disks too.
> After this, you responded with "disks and IO subsystems". And now in bug
> tracker, you again write just about disks.
> 
> Please:
> 1) Read atleast Error rates and handling in
>    http://en.wikipedia.org/wiki/Hard_disk_drive
> 2) Be clear on what problem do you have
> 3) Think about RAM at first - in PCs without ECC, in servers with just
>    very simple ECC, much weaker than used in disks and on the tapes
> 4) ... and what about the caches, all storages and all communication
>    paths along the path? What all we know about them? Almost nothing?
>    Checking just the spool disks (with all related subsystems needed to
>    check these) is very narrow view of such a complex thing
> 


I'm not trying to avoid those issues - I just used a very simple
description of the problem in the bug/feature request details.

I included a link to the mailing list thread so that anybody looking in
Mantis can see everything that has been discussed.

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