[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: partman-base (Debian) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
Images in: http://cdimages.ubuntu.com/ubuntu-server/precise/daily/current/ Have this updated partman-base. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
Does anyone have any clever approaches for install this updated udeb into a precise installer? Things I've tried: * downloading and installing an updated deb in preseed/early_command fails since the postinst tries to run parted and it's too early to do so * downloading and installing an updated deb in partman/early_command doesn't work since it runs it as a part of partman and thus runs partition twice * expanding the package into the initrd and booting w/ that results in the old package (153ubuntu4) being installed over it. Any other ideas? Thanks in advance. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: partman-base (Debian) Status: Fix Released = New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: oem-priority/precise Status: Fix Committed = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
This bug was fixed in the package partman-base - 153ubuntu5 --- partman-base (153ubuntu5) precise-proposed; urgency=low * Permit non-cylinder alignment again on GPT (closes: #674894, LP: #1006894). -- Colin Watson cjwat...@ubuntu.com Mon, 02 Jul 2012 14:54:45 +0100 ** Changed in: partman-base (Ubuntu Precise) Status: Fix Committed = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
For Precise, I tested this on both GPT style partition tables and PC MBR style partition tables. The GPT disks are now aligned. I detected no regressions in the MBR disks. ** Tags removed: verification-needed ** Tags added: verification-done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: oem-priority/precise Status: In Progress = Fix Committed ** Changed in: oem-priority Status: In Progress = Fix Committed ** Also affects: oem-priority/quantal Importance: Critical Assignee: Chris Van Hoof (vanhoof) Status: Fix Committed ** Changed in: oem-priority/quantal Status: Fix Committed = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
Hello Christopher, or anyone else affected, Accepted partman-base into precise-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/partman- base/153ubuntu5 in a few hours, and then in the -proposed repository. Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please change the bug tag from verification-needed to verification-done. If it does not, change the tag to verification-failed. In either case, details of your testing will help us make a better decision. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance! ** Changed in: partman-base (Ubuntu Precise) Status: In Progress = Fix Committed ** Tags added: verification-needed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Branch linked: lp:~ubuntu-branches/ubuntu/precise/partman-base /precise-proposed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: partman-base (Debian) Status: Unknown = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: oem-priority/precise Status: Confirmed = In Progress ** Changed in: oem-priority Status: Confirmed = In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: partman-base (Ubuntu Quantal) Status: Confirmed = In Progress ** Changed in: partman-base (Ubuntu Quantal) Milestone: None = quantal-alpha-3 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Also affects: partman-base (Debian) via http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=674894 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
This bug was fixed in the package partman-base - 158ubuntu1 --- partman-base (158ubuntu1) quantal; urgency=low * Resynchronise with Debian. Remaining changes: - Ubiquity integration: If PARTMAN_NO_COMMIT is set, then exit rather than running commit.d and finish.d scripts; add a partman-commit script; dump extra information to /var/lib/partman/snoop if PARTMAN_SNOOP is set; check for per-menu 'no_show_choices' file in ask_user and don't reshow the menu if it exists. - Don't skip over dmraid devices if the user chooses not to activate them. - If the only thing mounted on a disk is the installation medium and it uses more or less the whole disk, then silently exclude that disk; if the installation medium is mounted but doesn't use the whole disk, issue a warning that partitioning may be difficult; if anything else is mounted, offer to unmount it. partman/filter_mounted=false disables this. partman-base (158) unstable; urgency=low * Permit non-cylinder alignment again on GPT (closes: #674894, LP: #1006894). partman-base (157) unstable; urgency=low * Team upload [ Updated translations ] * Croatian (hr.po) by Tomislav Krznar * Portuguese (Brazil) (pt_BR.po) by Felipe Augusto van de Wiel (faw) -- Colin Watson cjwat...@ubuntu.com Mon, 02 Jul 2012 14:42:31 +0100 ** Changed in: partman-base (Ubuntu Quantal) Status: In Progress = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Branch linked: lp:~ubuntu-core-dev/partman-base/precise-proposed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Description changed: + [Impact] GPT partitioning always uses cylinder alignment, which is pessimal for performance on most modern disks. + [Test Case] Do a server install on a blank disk with the 'partman-partitioning/default_label=gpt' boot parameter. Accept all defaults for partitioning. Before confirming partitioning, look in /var/log/partman (from tty2); the byte numbers for the start of each partition should be multiples of 1048576. + [Regression Potential] The plausible things that might go wrong that are worth testing are: (a) it is possible that a bug might cause partitions to be misaligned with things such as large gaps between them or crazy sizes, so check that their sizes look vaguely reasonable; (b) non-GPT partitioning (i.e. in practice the traditional PC MBR partition table format) should not be changed as a result of this work. + I'm doing a fully preseeded install using a partman-auto disk recipe. This is an EFI install which obviously uses GPT. When I launch Disk Utility is complains that the EFI fat32 partition and the next ext4 Linux partition are misaligned by 3072 bytes and 2048 bytes respectively. When I dump the partitioning out in parted, I can see that the partition begins on logical sector 34: $ sudo parted /dev/sda unit s print Model: ATA ST9500423AS (scsi) Disk /dev/sda: 976773168s Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End SizeFile system Name Flags 1 34s390659s 390626s fat32boot 2 390660s39453160s 39062501s ext4 So the partition begins right after the GPT headers, but since this is a 4096 byte physical sector drive, this does not begin on a physical sector boundary. It should begin on logical sector 40 (physical sector 5) to have proper alignment. I'm not sure if this should be filed against partman-auto since this is a fully preseeded install or just partman-base. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: ubiquity (not installed) ProcVersionSignature: Ubuntu 3.2.0-24.38-generic 3.2.16 Uname: Linux 3.2.0-24-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 Date: Thu May 31 08:45:45 2012 DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-sutton-precise-amd64-20120523-0 InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz boot=casper automatic-ubiquity partman/alignment=minimal file=/cdrom/install/preseed.cfg quiet splash -- nouveau.modeset=0 InstallationMedia: Ubuntu 12.04 Precise - Build amd64 LIVE Binary 20120523-03:49 ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: ubiquity UpgradeStatus: No upgrade log present (probably fresh install) ** Description changed: [Impact] GPT partitioning always uses cylinder alignment, which is pessimal for performance on most modern disks. [Test Case] Do a server install on a blank disk with the 'partman-partitioning/default_label=gpt' boot parameter. Accept all defaults for partitioning. Before confirming partitioning, look in /var/log/partman (from tty2); the byte numbers for the start of each partition should be multiples of 1048576. [Regression Potential] The plausible things that might go wrong that are worth testing are: (a) it is possible that a bug might cause partitions to be misaligned with things such as large gaps between them or crazy sizes, so check that their sizes look vaguely reasonable; (b) non-GPT partitioning (i.e. in practice the traditional PC MBR partition table format) should not be changed as a result of this work. + + Original report follows: I'm doing a fully preseeded install using a partman-auto disk recipe. This is an EFI install which obviously uses GPT. When I launch Disk Utility is complains that the EFI fat32 partition and the next ext4 Linux partition are misaligned by 3072 bytes and 2048 bytes respectively. When I dump the partitioning out in parted, I can see that the partition begins on logical sector 34: $ sudo parted /dev/sda unit s print Model: ATA ST9500423AS (scsi) Disk /dev/sda: 976773168s Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End SizeFile system Name Flags 1 34s390659s 390626s fat32boot 2 390660s39453160s 39062501s ext4 So the partition begins right after the GPT headers, but since this is a 4096 byte physical sector drive, this does not begin on a physical sector boundary. It should begin on logical sector 40 (physical sector 5) to have proper alignment. I'm not sure if this should be filed against partman-auto since this is a fully
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Branch linked: lp:debian/partman-base -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Also affects: partman-base (Ubuntu Precise) Importance: Undecided Status: New ** Also affects: partman-base (Ubuntu Quantal) Importance: Critical Assignee: Colin Watson (cjwatson) Status: Confirmed ** Changed in: partman-base (Ubuntu Precise) Status: New = Confirmed ** Changed in: partman-base (Ubuntu Precise) Importance: Undecided = Critical ** Changed in: partman-base (Ubuntu Precise) Assignee: (unassigned) = Colin Watson (cjwatson) ** Changed in: partman-base (Ubuntu Precise) Milestone: None = ubuntu-12.04.1 ** Tags removed: rls-mgr-p-tracking rls-q-incoming -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Tags added: rls-q-incoming -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: oem-priority Assignee: James M. Leddy (jm-leddy) = Chris van Hoof (vanhoof) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: partman-base (Ubuntu) Importance: High = Critical ** Tags added: rls-mgr-p-tracking ** Changed in: oem-priority Importance: High = Critical ** Changed in: oem-priority/precise Importance: Undecided = Critical ** Changed in: oem-priority/precise Assignee: (unassigned) = James M. Leddy (jm-leddy) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: oem-priority/precise Status: New = Confirmed ** Changed in: oem-priority Status: New = Incomplete ** Changed in: oem-priority Status: Incomplete = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
This upstream bug seems like it may be related: http://bugs.debian.org /cgi-bin/bugreport.cgi?bug=674894 ** Bug watch added: Debian Bug tracker #674894 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=674894 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/partman-base/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
Also, note that the partman/alignment=minimal was just used as a test to see if it made any difference. I found this issue without using any special kernel command line option. Also, I'm attaching the disk-recipe I used for the install. ** Attachment added: disk-recipe https://bugs.launchpad.net/ubuntu/+source/partman-base/+bug/1006894/+attachment/3170159/+files/disk-recipe ** Description changed: I'm doing a fully preseeded install using a partman-auto disk recipe. This is an EFI install which obviously uses GPT. When I launch Disk Utility is complains that the EFI fat32 partition and the next ext4 Linux partition are misaligned by 3072 bytes and 2048 bytes respectively. When I dump the partitioning out in parted, I can see that the partition begins on logical sector 34: $ sudo parted /dev/sda unit s print Model: ATA ST9500423AS (scsi) Disk /dev/sda: 976773168s Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End SizeFile system Name Flags - 1 34s390659s 390626s fat32boot - 2 390660s39453160s 39062501s ext4 + 1 34s390659s 390626s fat32boot + 2 390660s39453160s 39062501s ext4 So the partition begins right after the GPT headers, but since this is a - 4096 byte physical sector drive, this does begin on a physical sector - boundary. It should begin on logical sector 40 (physical sector 5) to - have proper alignment. + 4096 byte physical sector drive, this does not begin on a physical + sector boundary. It should begin on logical sector 40 (physical sector + 5) to have proper alignment. I'm not sure if this should be filed against partman-auto since this is a fully preseeded install or just partman-base. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: ubiquity (not installed) ProcVersionSignature: Ubuntu 3.2.0-24.38-generic 3.2.16 Uname: Linux 3.2.0-24-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 Date: Thu May 31 08:45:45 2012 DistributionChannelDescriptor: - # This is a distribution channel descriptor - # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor - canonical-oem-sutton-precise-amd64-20120523-0 + # This is a distribution channel descriptor + # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor + canonical-oem-sutton-precise-amd64-20120523-0 InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz boot=casper automatic-ubiquity partman/alignment=minimal file=/cdrom/install/preseed.cfg quiet splash -- nouveau.modeset=0 InstallationMedia: Ubuntu 12.04 Precise - Build amd64 LIVE Binary 20120523-03:49 ProcEnviron: - TERM=xterm - PATH=(custom, no user) - LANG=en_US.UTF-8 - SHELL=/bin/bash + TERM=xterm + PATH=(custom, no user) + LANG=en_US.UTF-8 + SHELL=/bin/bash SourcePackage: ubiquity UpgradeStatus: No upgrade log present (probably fresh install) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/partman-base/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
Adding the OEM Priority task because this issue affects some of Canonical's OEM customer projects in which disk performance will be degraded and cause a poor user experience. Also, I can make an image available that has the full preseeded install. ** Also affects: oem-priority Importance: Undecided Status: New ** Changed in: oem-priority Importance: Undecided = High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
Could you post: /sys/block/sda/alignment_offset /sys/block/sda/queue/minimum_io_size /sys/block/sda/queue/optimal_io_size /sys/block/sda/queue/physical_block_size -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: oem-priority Assignee: (unassigned) = James M. Leddy (jm-leddy) ** Changed in: partman-base (Ubuntu) Status: New = Incomplete ** Changed in: partman-base (Ubuntu) Assignee: (unassigned) = Colin Watson (cjwatson) ** Changed in: partman-base (Ubuntu) Importance: Undecided = High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
@Colin: Here is your requested info: $ cat /sys/block/sda/alignment_offset 0 $ cat /sys/block/sda/queue/minimum_io_size 4096 $ cat /sys/block/sda/queue/optimal_io_size 0 $ cat /sys/block/sda/queue/physical_block_size 4096 Also note that this has been seen on both Dell and Lenovo hardware. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Also affects: oem-priority/precise Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1006894] Re: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors
** Changed in: partman-base (Ubuntu) Status: Incomplete = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1006894 Title: Partitions are misaligned when using GPT on disks w/ 4096 byte physical sectors To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1006894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
