Comment 0 for bug 1006894

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 Size File system Name Flags
 1 34s 390659s 390626s fat32 boot
 2 390660s 39453160s 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.

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)