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Do buffers mess with verification?   [Discuss]

By: John Leslie       
Date: Jun 13,2018 at 17:50
In Response to: Do buffers mess with verification? (Peter Shute)

> As Liviu pointed out above
> (http://www.ztw3.com/forum/forum_entry.php?id=121665), the verification
> switches built into the copy and xcopy commands don't necessarily work
> because they could be comparing file caches, not the actual contents of
> the disk.
>
> With the amount of memory available these days, and with caches built
> into drives, what do you have to do to be sure you're really verifying?
> Reboot and compare?

That was my original thought too, but certainly in the case of Syncback Pro and a Qnap NAS I was getting some verification errors which led to me finding some SATA bus errors, which the NAS had in its logs but didn't feel the need to communicate to me...

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