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

From: Arno Wagner <arno@wagner.name>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] dm-crypt on SSD gives regular file corruption and segfaults
Date: Tue, 27 Dec 2011 08:46:12 +0100	[thread overview]
Message-ID: <20111227074611.GA3652@tansi.org> (raw)
In-Reply-To: <4EF8E106.600@deserettechnology.com>

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
RAM. 

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.

Arno

On Mon, Dec 26, 2011 at 02:03:02PM -0700, Jeff Cook wrote:
> On 12/25/2011 10:32 PM, epvdm@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@wagner.name 
GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
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