Re: csum errors in VirtualBox VDI files

[Kai Krakow <hurikhan77@gmail.com>]

Am Tue, 22 Mar 2016 13:42:00 -0600
schrieb Chris Murphy <lists@colorremedies.com>:

> This is kinda confusing.

Err yes maybe... ;-D

> So the gist is that the guest OS is Windows, so the VDI contains an
> NTFS file system. Correct? And that VDI is on a Btrfs formatted bcache
> device. Correct? Does the VDI have +C xattr set?

Yes:

VirtualBox runs guest OS "Windows 7 32-bit"
VDI file is stored on btrfs running on bcache device
chattr +C is not set

I used chattr +C until a few weeks ago when I decided to flip
autodefrag back on and realised that +C won't allow compressing file
contents. The VM actually ran faster afterwards. And it ran fine until
lately when those errors occurred.

But I have to admit I didn't use the VM a lot in a while. So the first
time the error occurred may be a few more days back. According to my
snapshot backlog on the backup partition, the last successful backup of
this VDI file was on 2016-03-13 when I was running kernel 4.4.4
according to my emerge log.

-- 
Regards,
Kai

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