[Bug 879387] Re: Partitions misaligned on advanced format drive WD20EARX

[Danny Howard]

The fix for me was to fire up GParted, delete the partition, recreate it
with 1M of blank space before it, and un-check align to cylinders.
Everything is pretty now.

I tried just doing a resize operation at first but that took forever.  I
think it was illustrating to me the problem of block mis-alignment. :)

It would be good to get the toolshain handling these alignment issues
transparently for the user ...

Thanks,
-danny

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https://bugs.launchpad.net/bugs/879387

Title:
  Partitions misaligned on advanced format drive WD20EARX

Status in “ubiquity” package in Ubuntu:
  Confirmed

Bug description:
  After installing Ubuntu Oneiric 11.10 using manual partitioning on a
  2TB Western Digital WD20EARX with "advanced format" (4k sectors?) Disk
  Utility says all partitions are misaligned. Parted tells the same
  story (below). I'd expect the partitioner to align partitions.

  $ sudo parted -l
  Model: ATA WDC WD20EARX-00P (scsi)
  Disk /dev/sda: 2000GB
  Sector size (logical/physical): 512B/4096B
  Partition Table: gpt

  Number  Start   End     Size    File system     Name  Flags
   1      17.4kB  25.0GB  25.0GB  ext4
   2      25.0GB  125GB   100GB
   3      125GB   150GB   25.0GB  linux-swap(v1)
   4      150GB   2000GB  1850GB  ext4

  $ sudo parted /dev/sda align-check opt 1
  1 not aligned
  $ sudo parted /dev/sda align-check min 1
  1 not aligned

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
  Date: Fri Oct 21 14:39:37 2011
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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