* [dm-crypt] dm-crypt on SSD gives regular file corruption and segfaults @ 2011-12-26 4:56 Jeff Cook 2011-12-26 5:32 ` epvdm 2011-12-26 9:05 ` Milan Broz 0 siblings, 2 replies; 5+ messages in thread From: Jeff Cook @ 2011-12-26 4:56 UTC (permalink / raw) To: dm-crypt 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 -- Jeff Cook jeff@deserettechnology.com ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dm-crypt] dm-crypt on SSD gives regular file corruption and segfaults 2011-12-26 4:56 [dm-crypt] dm-crypt on SSD gives regular file corruption and segfaults Jeff Cook @ 2011-12-26 5:32 ` epvdm 2011-12-26 21:03 ` Jeff Cook 2011-12-26 9:05 ` Milan Broz 1 sibling, 1 reply; 5+ messages in thread From: epvdm @ 2011-12-26 5:32 UTC (permalink / raw) To: Jeff Cook; +Cc: dm-crypt 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 > -- > Jeff Cook > jeff@deserettechnology.com 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. eric > _______________________________________________ > dm-crypt mailing list > dm-crypt@saout.de > http://www.saout.de/mailman/listinfo/dm-crypt ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dm-crypt] dm-crypt on SSD gives regular file corruption and segfaults 2011-12-26 5:32 ` epvdm @ 2011-12-26 21:03 ` Jeff Cook 2011-12-27 7:46 ` Arno Wagner 0 siblings, 1 reply; 5+ messages in thread From: Jeff Cook @ 2011-12-26 21:03 UTC (permalink / raw) To: epvdm; +Cc: dm-crypt 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 ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dm-crypt] dm-crypt on SSD gives regular file corruption and segfaults 2011-12-26 21:03 ` Jeff Cook @ 2011-12-27 7:46 ` Arno Wagner 0 siblings, 0 replies; 5+ messages in thread From: Arno Wagner @ 2011-12-27 7:46 UTC (permalink / raw) To: dm-crypt 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 > _______________________________________________ > dm-crypt mailing list > dm-crypt@saout.de > http://www.saout.de/mailman/listinfo/dm-crypt > -- 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 ---- Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans If it's in the news, don't worry about it. The very definition of "news" is "something that hardly ever happens." -- Bruce Schneier ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dm-crypt] dm-crypt on SSD gives regular file corruption and segfaults 2011-12-26 4:56 [dm-crypt] dm-crypt on SSD gives regular file corruption and segfaults Jeff Cook 2011-12-26 5:32 ` epvdm @ 2011-12-26 9:05 ` Milan Broz 1 sibling, 0 replies; 5+ messages in thread From: Milan Broz @ 2011-12-26 9:05 UTC (permalink / raw) To: jeff; +Cc: dm-crypt On 12/26/11 05:56, Jeff Cook wrote: > 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. Check your hw first - mainly SSD and RAM. I saw several such corruptions on SSD recently and it was always hw related. You will probably see the same problem even if you use your disk directly without dmcrypt, just not so often - encryption usually makes small data corruption worse because of error distribution during encryption (one corrupted bit in underlying device -> at least 16 byte block corrupted after decryption - for fs bitmap array this is fatal error). Milan ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2011-12-27 7:46 UTC | newest] Thread overview: 5+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2011-12-26 4:56 [dm-crypt] dm-crypt on SSD gives regular file corruption and segfaults Jeff Cook 2011-12-26 5:32 ` epvdm 2011-12-26 21:03 ` Jeff Cook 2011-12-27 7:46 ` Arno Wagner 2011-12-26 9:05 ` Milan Broz
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