[Bug 1259703] [NEW] growpart on disk larger than 2TB fails

[Scott Moser]

Public bug reported:

For disks larger than 2TB (the amount addressable by MBR), growpart will mess up partition tables.
It also fails in such a way that it ends up shrinking the partition table, see below for an example.

In reality, this is probably an sfdisk bug, but I can work around it in
growpart by just knowing the max size.

$ sudo growpart -v --dry-run /dev/sdb 1 
geometry is -C 364801 -H 255 -S 63. total size=5860528065
max_end=5860528065 tot=5860528065 pt_end=209715200 pt_start=2048 pt_size=209713152
CHANGE: partition=1 start=2048 old: size=209713152 end=209715200 new: size=5860526017,end=5860528065
# === old sfdisk -d ===
# partition table of /dev/sdb
unit: sectors

/dev/sdb1 : start=     2048, size=209713152, Id=83, bootable
/dev/sdb2 : start=        0, size=        0, Id= 0
/dev/sdb3 : start=        0, size=        0, Id= 0
/dev/sdb4 : start=        0, size=        0, Id= 0
# === new sfdisk -d ===
# partition table of /dev/sdb
unit: sectors

/dev/sdb1 : start=     2048, size=5860526017, Id=83, bootable
/dev/sdb2 : start=        0, size=        0, Id= 0
/dev/sdb3 : start=        0, size=        0, Id= 0
/dev/sdb4 : start=        0, size=        0, Id= 0

$ sudo growpart /dev/sdb 1 
CHANGED: partition=1 start=2048 old: size=209713152 end=209715200 new: size=5860526017,end=5860528065

$ grep "sdb" /proc/partitions 
   8       16 2930266584 sdb
   8       17  782779360 sdb1

$ sudo sfdisk -l /dev/sdb -u -S
unrecognized format - using sectors

Disk /dev/sdb: 364801 cylinders, 255 heads, 63 sectors/track
Units = sectors of 512 bytes, counting from 0

   Device Boot    Start       End   #sectors  Id  System
/dev/sdb1   *      2048 1565560768 1565558721  83  Linux
/dev/sdb2             0         -          0   0  Empty
/dev/sdb3             0         -          0   0  Empty
/dev/sdb4             0         -          0   0  Empty

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: cloud-utils 0.25-0ubuntu5
ProcVersionSignature: User Name 3.2.0-57.87-generic 3.2.52
Uname: Linux 3.2.0-57-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Tue Dec 10 21:28:44 2013
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: cloud-utils
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: cloud-utils (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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Title:
  growpart on disk larger than 2TB fails

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