On 18/07/15 19:38, Leslie Rhorer wrote: > Package: coreutils > Version: 8.23-4 > Severity: grave > Justification: renders package unusable > > Dear Maintainer, > > CRC checks on large files often return variable values. I have tried several > different CRC check utilities, md5sum, md6sum, sha56sum, etc., and they all > exhibit the same behavior. Multiple runs of the utility on a given file more > often than not will return different values for many or all of the attempts. > I have only noticed the effect on large files, but I cannot say with > authority it only happens on large files. I noticed the effect when checking > file integrity between identical files on two different systems. The backup > server is running Squeeze, and checks on the files of that system are > consistent, but when comparing the CRC between that system and the primary, > which is running Jessie, the checks often failed. At first I of course > thought this indicated file corruption on one server or the other, beut when > I started investigating, I discovered sometimes the results were different on > the two systems and sometimes the same. At that point I discovered it was > only th! > e machine running Jessie that was producing inconsistent results. At first > I thought I was having problems with the file system (and indeed I am, as it > happens), but when I copied one of the large files over to a different file > system, the problem perissts. One is an XFS file system (the one having the > problems) and the other is an Ext4 file system. > > Note this impacts a great many very important procedures and utilities, > including my backup and compare strategy using rsync, file systems checks, > etc. > > RAID-Server:/# sha256sum "/RAID/Recordings/Abyss, The (Recorded Thu Sep 11, > 2014, MAXHD).mp4" > b2e15ca178832e9f12a4823c583eefb2028cec9f7c45f36ea9dfa2297c904d6d > /RAID/Recordings/Abyss, The (Recorded Thu Sep 11, 2014, MAXHD).mp4 > RAID-Server:/# sha256sum "/RAID/Recordings/Abyss, The (Recorded Thu Sep 11, > 2014, MAXHD).mp4" > eb3067b250d5d16e1d5d3f2b328001be91c4e5107a14e0010940acdab6584f2b > /RAID/Recordings/Abyss, The (Recorded Thu Sep 11, 2014, MAXHD).mp4 > RAID-Server:/# sha256sum "/RAID/Recordings/Abyss, The (Recorded Thu Sep 11, > 2014, MAXHD).mp4" > 6eddb4174b49e9bac741070559ad159acaa39a404a1b75c395d716910e5c81ef > /RAID/Recordings/Abyss, The (Recorded Thu Sep 11, 2014, MAXHD).mp4
The inconsistent results are restricted to the Jessie system? I'd run memtest given results like that. Also I'd verify a separate checksum implementation. I don't think debian configures coreutils --with-openssl so this should be independent: openssl md5 largefile thanks, Pádraig. -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
