On Tue, Dec 22, 2020 at 14:21:20 CET, Milan Broz wrote: > On 16/12/2020 01:06, Martin Jørgensen wrote: > > > For the reference, if anyone experiences the same problem I don't recommend using usb at all for transferring LUKS-volumes. > > Just a small addition: > > This is really not LUKS specific, if you have failing HW data is going to > be corrupted - just in the case of encrypted data the error will usually > propagate to whole sectors, so it is more visible to upper layer (fs). Pretty much. When I did a measurement for my PhD (a long time ago), I needed to pull 15TB from tape (disk were up to 200GB at that time). I found about 15 bit-errors in there on decompression that were not noticed in any place before and likely would have gone unnoticed if the data had not been compressed. Crypto is simimar in that it amplifies bit-erors and suddenly you see them, even if they were there before. > And many external drivers or USB interfaces are really unreliable these > days in long-term use... Yes. And often it is some chip-internal bus or memory that is not protected with checksums and fries a bit every few GB you pipe through there. Regards, Arno -- Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@xxxxxxxxxxx GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718 ---- A good decision is based on knowledge and not on numbers. -- Plato If it's in the news, don't worry about it. The very definition of "news" is "something that hardly ever happens." -- Bruce Schneier _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx https://www.saout.de/mailman/listinfo/dm-crypt
