[Bug 605720] Re: fdisk creates partition beyond end of disk

[Phillip Susi]

Seems pretty clear to me that this is not a bug.  fdisk reports the
number of *whole* cylinders on the disk, so using sector mode to use
part of the last partial cylinder correctly shows it as ending one
cylinder above the reported whole cylinder count.


** Changed in: util-linux (Ubuntu)
       Status: Triaged => Invalid

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Title:
  fdisk creates partition beyond end of disk

Status in “util-linux” package in Ubuntu:
  Invalid

Bug description:
  Binary package hint: util-linux

  fdisk creates a partition with the last cylinder 1 greater than the
  last available cylinder on the disk.

  This is probably the root of the problem with this server installation
  bug: #569900

  I was able to reproduce this on two 500GB drives, one was Seagate and
  the other WD. The total cylinder and sector count was the same on both
  drives.

  # fdisk -l /dev/sda

  Disk /dev/sda: 500.1 GB, 500107862016 bytes
  255 heads, 63 sectors/track, 60801 cylinders
  Units = cylinders of 16065 * 512 = 8225280 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disk identifier: 0x00068cd4

  Starting with no partitions defined I started fdisk and turned off the DOS compatibility mode and changed the units to sectors.
  I created partition 1 as Primary, starting at sector 2048 and size +1G.
  I created partition 2 as Primary, starting at the default and using the rest of the drive.

  If I change the units back to cylinders and then print the table the last cylinder on the second partition is 60802.
  If I start with the units set to cylinders, it works properly and sets the last cylinder to 60801.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: util-linux 2.17.2-0ubuntu1
  ProcVersionSignature: Ubuntu 2.6.32-21.32-generic-pae 2.6.32.11+drm33.2
  Uname: Linux 2.6.32-21-generic-pae i686
  Architecture: i386
  Date: Wed Jul 14 23:17:46 2010
  InstallationMedia: Ubuntu-Server 10.04 LTS "Lucid Lynx" - Release i386 (20100427)
  ProcEnviron:
   SHELL=/bin/bash
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  SourcePackage: util-linux

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