[dm-crypt] dm-crypt on SSD gives regular file corruption and segfaults

Arno Wagner arno at wagner.name
Tue Dec 27 08:46:12 CET 2011

Corruption and crashes in combination are almost always
RAM and sometimes CPU (overclocked), mainboard and PSU
(old or low-quality).
For this reason there is a long text in the cryptsetup
FAQ section on troubleshooting that deals with testing

Not nice, as the only wa to fix this is replacement
(and I know that quite a few people cannot just pay
for new RAM without thinking about where to get the 
money), but a fact of consumer-grade hardware.


On Mon, Dec 26, 2011 at 02:03:02PM -0700, Jeff Cook wrote:
> On 12/25/2011 10:32 PM, epvdm at limpoc.com wrote:
> > On Sun, Dec 25, 2011 at 09:56:38PM -0700, Jeff Cook wrote:
> >> Hello.
> >>
> >> I'm not sure if the cause of this is the SSD or dm-crypt or what, but I
> >> thought I would ask here if anyone had similar problems. My SSD with
> >> ext4 and dm-crypt experiences significant corruptions and frequent,
> >> seemingly-random segfaults. Data transferred to my disk will offer
> >> different md5sums and sometimes large things consider themselves
> >> corrupted. Has anyone experience things on dm-crypt or SSD? I am just
> >> curious if this should be attributed to the dm-crypt software layer or
> >> if I need to start looking more into the hardware.
> >>
> >> From
> >> Jeff
> > 
> > Well, I am a little concerned because this is precisely my setup, 
> > however I have never had any problems. 
> > I have used it in two configurations: 
> > 
> > ext4 on top of dm-crypt (LUKS) on SSD
> > 
> > ext4 inside lvm on top of dm-crypt (LUKS) on SSD
> > 
> > Both have always worked perfectly for me, over a number of months at least.
> > I frequently manipulate large files such as ISO images, and often use rsync
> > to backup the whole filesystem, without trouble. 
> I appreciate your data point, thank you. I believe I am just going to
> have to accept that this is hardware, even though I was hoping it was
> software related since that's easier to handle.
> Thanks again.
> > 
> > eric
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Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno at wagner.name 
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