Red Hat Bugzilla – Full Text Bug Listing
|Summary:||ARM images have unaligned partitions|
|Product:||[Fedora] Fedora||Reporter:||Hans de Goede <hdegoede>|
|Component:||appliance-tools||Assignee:||Dennis Gilmore <dennis>|
|Status:||CLOSED CURRENTRELEASE||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Version:||19||CC:||agrimm, apevec, ask, dhuff, jdisnard, mattdm, mgoldman, virt-maint|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2015-01-10 05:29:34 EST||Type:||Bug|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Bug Depends On:|
Description Hans de Goede 2013-07-31 05:15:37 EDT
Normally partitions created by either fdisk or parted are aligned to a multiple of 1MiB, so usually a multiple of 2048 sectors, for the F-19 arm images this is not the case, they don't seem to have any alignment at all, which is bad for performance: [hans@localhost ~]$ sudo fdisk /dev/loop5 Welcome to fdisk (util-linux 2.23.1). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): p Disk /dev/loop5: 7889 MB, 7889485824 bytes, 15409152 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Disk identifier: 0x0006ca47 Device Boot Start End Blocks Id System /dev/loop5p1 1953 1001953 500000+ 83 Linux /dev/loop5p2 1001954 2001953 500000 83 Linux /dev/loop5p3 2001954 14697265 6347656 83 Linux This is also what is breaking rottfs-resize, as it re-creates p3 using fdisk which will then properly align the partition start, making it different from what it was before.
Comment 1 Fedora Admin XMLRPC Client 2014-01-12 14:52:25 EST
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
Comment 2 Jon Disnard 2014-03-30 18:01:35 EDT
Created attachment 880547 [details] patch: use pated 'optimal' alignment instead of non-optimal cylinder alignment This patch goes with the upstream appliance-tools on fedorahosted: https://git.fedorahosted.org/git/appliance-tools.git It leverages 'parted -a optimal' instead of 'cylinder' based alignment. Tested with ARM generated images only, but should be fine for cloud images too. With optimal alignment, the starting offset of the first partition is 2048, instead of 1953 with cylinder alignment.
Comment 3 Fedora End Of Life 2015-01-09 14:11:45 EST
This message is a notice that Fedora 19 is now at end of life. Fedora has stopped maintaining and issuing updates for Fedora 19. It is Fedora's policy to close all bug reports from releases that are no longer maintained. Approximately 4 (four) weeks from now this bug will be closed as EOL if it remains open with a Fedora 'version' of '19'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 19 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
Comment 4 Hans de Goede 2015-01-10 05:29:34 EST
This is fixed in F-21.