On 2016-07-15 03:27, Kacper Kowalski wrote:
> Hi,
> 
> I get this error message while making full back up of shared directory
> on other computer with WinXP and the backup stops so I can't make full
> backup although I tried it a lot of times. The error message appears
> in other directories for each try, so it's not a problem with
> particural files.
> 
> Is this problem with my LAN or maybe some configuration issues?

In a nutshell, this is telling you that the smb layer is detecting data 
corruption by failing its CRC check.  This usually isn't a LAN issue 
(although it's certainly not ruled out) but it can be caused by 
everything from a failing drive from viruses to software between the smb 
layer and hardware layer failing (or failing to keep up) -- compression, 
encryption, etc.

In short:  this is bad.  It can mean all your data is suspect.  If 
you're *lucky*, it's corruption of the SMB shared libraries or layers on 
the host system, and the data is intact; if you are unlucky, all the 
data is corrupted.

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