I can confirm this bug with current karmic kernel: 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux
Steps to reproduce: Download same file with 2 sources in parallel. I took Opera, and wget. wget http://ubuntu.intergenia.de/releases/karmic/ubuntu-9.10-desktop-i386.iso Opera saved to http://ubuntu.intergenia.de/releases/karmic/ubuntu-9.10-desktop-i386.iso-opera Results: rol...@pdbxe100:~$ md5sum ubuntu-9.10-desktop-i386.iso 8790491bfa9d00f283ed9dd2d77b3906 ubuntu-9.10-desktop-i386.iso rol...@pdbxe100:~$ md5sum ubuntu-9.10-desktop-i386.iso-opera 3f979c279665cc7d6ead2c11b1060188 ubuntu-9.10-desktop-i386.iso-opera rol...@pdbxe100:~$ ls -l ubuntu-9.10-desktop-i386.iso* -rw-r--r-- 1 roland roland 723488768 2009-10-28 22:14 ubuntu-9.10-desktop-i386.iso -rw-r--r-- 1 roland roland 723488768 2010-01-28 15:35 ubuntu-9.10-desktop-i386.iso-opera rol...@pdbxe100:~$ Using cmp I found that there were NO differences?! rol...@pdbxe100:~$ cmp ubuntu-9.10-desktop-i386.iso ubuntu-9.10-desktop-i386.iso-opera I wondered, and compared again via md5sum: rol...@pdbxe100:~$ md5sum ubuntu-9.10-desktop-i386.iso 8790491bfa9d00f283ed9dd2d77b3906 ubuntu-9.10-desktop-i386.iso rol...@pdbxe100:~$ md5sum ubuntu-9.10-desktop-i386.iso-opera 8790491bfa9d00f283ed9dd2d77b3906 ubuntu-9.10-desktop-i386.iso-opera rol...@pdbxe100:~$ So after accessing the files a second time, they seemed to have synced, flushed after delay .. or whatever. This are my ext4 flags: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize I created the filesystem manually via mkfs.ext4 /dev/sda4. -- in-place corruption of large files *without fsck or reboot* reported with linux 2.6.31-14.46 on ext4 https://bugs.launchpad.net/bugs/453579 You received this bug notification because you are a member of Mythbuntu Bug Team, which is a direct subscriber. Status in The Linux Kernel: New Status in Ubuntu Release Notes: Fix Released Status in “linux” package in Ubuntu: Triaged Status in “linux” source package in Karmic: Triaged Bug description: There are worrying reports of filesystem corruption on ext4 in karmic. Scott says: 12:36 < Keybuk> this whole ext4 thing is worrying me 12:36 < Keybuk> I just downloaded an iso image, md5sum didn't match 12:36 < Keybuk> downloaded it into an ext3 partition, matched just fine 12:59 < Keybuk> and I know mvo has seen bugs with corrupted .debs in /var/cache/apt/archives 12:59 < Keybuk> which seems to imply its any file large enough to use lots of extents I'm opening this bug report so that this bug gets tracked & triaged for karmic. If we're unable to isolate the issue, we should consider rolling back to ext3 as the default filesystem in the installer. ProblemType: Bug Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: vorlon 3350 F.... pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xee240000 irq 17' Mixer name : 'Analog Devices AD1981' Components : 'HDA:11d41981,17aa2025,00100200' Controls : 20 Simple ctrls : 11 Date: Fri Oct 16 16:01:26 2009 DistroRelease: Ubuntu 9.10 HibernationDevice: RESUME=UUID=f108133c-6b9d-4d28-9058-0b3a0c5549b4 MachineType: LENOVO 6371CTO Package: linux-image-2.6.31-14-generic 2.6.31-14.46 PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcCmdLine: root=/dev/mapper/hostname-root ro ProcEnviron: PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.31-13.44-generic RelatedPackageVersions: linux-firmware 1.22 SourcePackage: linux Uname: Linux 2.6.31-13-generic x86_64 WpaSupplicantLog: dmi.bios.date: 12/27/2006 dmi.bios.vendor: LENOVO dmi.bios.version: 7IET23WW (1.04 ) dmi.board.name: 6371CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr7IET23WW(1.04):bd12/27/2006:svnLENOVO:pn6371CTO:pvrThinkPadT60:rvnLENOVO:rn6371CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 6371CTO dmi.product.version: ThinkPad T60 dmi.sys.vendor: LENOVO ls _______________________________________________ Mailing list: https://launchpad.net/~mythbuntu-bugs Post to : [email protected] Unsubscribe : https://launchpad.net/~mythbuntu-bugs More help : https://help.launchpad.net/ListHelp
