[Bug 1808421] Re: gparted produces unusual results when ZFS partitios exist

[Curtis Gedak]

>From the description it appears that at one time the whole disk was
formatted as zfs and that those file system signatures remain.

You can check what is going on with the following two commands:

  sudo blkid /dev/sda
  sudo wipefs --no-act /dev/sda 

To fix you will likely need to remove the extraneous file system
signatures.  The wipefs command can help you remove the specific
incorrect signature.

For reference, see:

zfs partition wrongly shows occupying the whole disk
https://gitlab.gnome.org/GNOME/gparted/issues/14

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https://bugs.launchpad.net/bugs/1808421

Title:
  gparted produces unusual results when ZFS partitios exist

Status in gparted package in Ubuntu:
  New

Bug description:
  Run gparted on a disk that has ZFS partitions. It shows one entire
  partition. Parted seems to display correctly. gparted image attached.

  hbarta at saugage:~$ sudo parted /dev/sda
  GNU Parted 3.2
  Using /dev/sda
  Welcome to GNU Parted! Type 'help' to view a list of commands.
  (parted) p                                                                
  Model: ATA Samsung SSD 850 (scsi)
  Disk /dev/sda: 1000GB
  Sector size (logical/physical): 512B/512B
  Partition Table: gpt
  Disk Flags: 

  Number  Start   End    Size    File system  Name                          Flags
   1      1049kB  538MB  537MB   fat32                                      boot, esp
   2      538MB   555MB  16.8MB  zfs          Microsoft reserved partition  msftres
   3      555MB   105GB  105GB   ntfs         Basic data partition          msftdata
   4      105GB   420GB  315GB   zfs          rpool

  (parted) q                                                                
  hbarta at saugage:~$ 

  hbarta at saugage:~$ sudo sgdisk -p /dev/sda
  Disk /dev/sda: 1953525168 sectors, 931.5 GiB
  Model: Samsung SSD 850 
  Sector size (logical/physical): 512/512 bytes
  Disk identifier (GUID): EBA09D2E-0F70-4D11-8E37-C1C170CFD9DD
  Partition table holds up to 128 entries
  Main partition table begins at sector 2 and ends at sector 33
  First usable sector is 34, last usable sector is 1953525134
  Partitions will be aligned on 2048-sector boundaries
  Total free space is 1133243757 sectors (540.4 GiB)

  Number  Start (sector)    End (sector)  Size       Code  Name
     1            2048         1050623   512.0 MiB   EF00  
     2         1050624         1083391   16.0 MiB    0C01  Microsoft reserved ...
     3         1083392       205883391   97.7 GiB    0700  Basic data partition
     4       205883392       820283391   293.0 GiB   8300  rpool
  hbarta at saugage:~$

  hbarta at saugage:~$ lsb_release -rd
  Description:	Ubuntu 18.10
  Release:	18.10
  hbarta at saugage:~$ 

  Reproduce: 
  1) Configure (perhaps install) Ubuntu on a drive with a ZFS partition.
  2) Open gparted.

  Note: Same issue happens with gparted on the 18.04.1 desktop install
  USB.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: gparted 0.32.0-1ubuntu1
  ProcVersionSignature: Ubuntu 4.18.0-12.13-generic 4.18.17
  Uname: Linux 4.18.0-12-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.10-0ubuntu13.1
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Dec 13 15:05:13 2018
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US
   SHELL=/bin/bash
  SourcePackage: gparted
  UpgradeStatus: Upgraded to cosmic on 2018-12-13 (0 days ago)
  mtime.conffile..etc.logrotate.d.apport: 2018-12-12T13:31:49.347693

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