[Bug 1473934] Re: ISST-LTE: pmac-fdisk doesn't work with mpath devices

Wed Jul 22 03:40:07 UTC 2015

In discussing this with Adam, we believe the issue is that we should
simply be using the util-linux fdisk instead of the mac-fdisk one.  This
seems possible to fix for 14.04.3.

** Changed in: mac-fdisk (Ubuntu)
   Importance: Undecided => High

** Changed in: mac-fdisk (Ubuntu)
       Status: New => Triaged

** Changed in: mac-fdisk (Ubuntu)
     Assignee: (unassigned) => Adam Conrad (adconrad)

** Also affects: mac-fdisk (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Changed in: mac-fdisk (Ubuntu Trusty)
   Importance: Undecided => High

** Changed in: mac-fdisk (Ubuntu Trusty)
       Status: New => Triaged

** Changed in: mac-fdisk (Ubuntu Trusty)
    Milestone: None => ubuntu-14.04.3

** Changed in: mac-fdisk (Ubuntu Trusty)
     Assignee: (unassigned) => Adam Conrad (adconrad)

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https://bugs.launchpad.net/bugs/1473934

Title:
  ISST-LTE: pmac-fdisk doesn't work with mpath devices

Status in mac-fdisk package in Ubuntu:
  Triaged
Status in mac-fdisk source package in Trusty:
  Triaged

Bug description:
  ---Problem Description---
  1. fdisk -l doesn't work with mpath device:

  % sudo fdisk -l /dev/mapper/mpath0
  The number of cylinders for this disk is set to 4252.
  This is larger than 1024, and may cause problems with:
  1) software that runs at boot time (e.g., LILO)
  2) booting and partitioning software form other OSs
     (e.g., DOS FDISK, OS/2 FDISK)

  Disk /dev/sda: 128 heads, 32 sectors, 4252 cylinders
  Units = cylinders of 4096 * 512 bytes

     Device Boot   Begin    Start      End   Blocks   Id  System
  /dev/sda1            1        1   135324277143551+  ee  Unknown
  Partition 1 does not end on cylinder boundary:
       phys=(1023, 254, 63) should be (1023, 127, 32)
  The number of cylinders for this disk is set to 4252.
  This is larger than 1024, and may cause problems with:
  1) software that runs at boot time (e.g., LILO)
  2) booting and partitioning software form other OSs
     (e.g., DOS FDISK, OS/2 FDISK)

  Disk /dev/sdb: 128 heads, 32 sectors, 4252 cylinders
  Units = cylinders of 4096 * 512 bytes

     Device Boot   Begin    Start      End   Blocks   Id  System
  /dev/sdb1            1        1       21    42992   83  Linux native
  The number of cylinders for this disk is set to 4252.
  This is larger than 1024, and may cause problems with:
  1) software that runs at boot time (e.g., LILO)
  2) booting and partitioning software form other OSs
     (e.g., DOS FDISK, OS/2 FDISK)
  Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)

  Disk /dev/sdc: 128 heads, 32 sectors, 4252 cylinders
  Units = cylinders of 4096 * 512 bytes

     Device Boot   Begin    Start      End   Blocks   Id  System
  The number of cylinders for this disk is set to 4252.
  This is larger than 1024, and may cause problems with:
  1) software that runs at boot time (e.g., LILO)
  2) booting and partitioning software form other OSs
     (e.g., DOS FDISK, OS/2 FDISK)
  Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)

  Disk /dev/sdd: 128 heads, 32 sectors, 4252 cylinders
  Units = cylinders of 4096 * 512 bytes

     Device Boot   Begin    Start      End   Blocks   Id  System
  The number of cylinders for this disk is set to 4252.
  This is larger than 1024, and may cause problems with:
  1) software that runs at boot time (e.g., LILO)
  2) booting and partitioning software form other OSs
     (e.g., DOS FDISK, OS/2 FDISK)
  Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)

  Disk /dev/sde: 128 heads, 32 sectors, 4252 cylinders
  Units = cylinders of 4096 * 512 bytes

     Device Boot   Begin    Start      End   Blocks   Id  System
  The number of cylinders for this disk is set to 4252.
  This is larger than 1024, and may cause problems with:
  1) software that runs at boot time (e.g., LILO)
  2) booting and partitioning software form other OSs
     (e.g., DOS FDISK, OS/2 FDISK)
  Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)

  Disk /dev/sdf: 128 heads, 32 sectors, 4252 cylinders
  Units = cylinders of 4096 * 512 bytes

     Device Boot   Begin    Start      End   Blocks   Id  System
  The number of cylinders for this disk is set to 4252.
  This is larger than 1024, and may cause problems with:
  1) software that runs at boot time (e.g., LILO)
  2) booting and partitioning software form other OSs
     (e.g., DOS FDISK, OS/2 FDISK)
  Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)

  Disk /dev/sdg: 128 heads, 32 sectors, 4252 cylinders
  Units = cylinders of 4096 * 512 bytes

     Device Boot   Begin    Start      End   Blocks   Id  System
  The number of cylinders for this disk is set to 4252.
  This is larger than 1024, and may cause problems with:
  1) software that runs at boot time (e.g., LILO)
  2) booting and partitioning software form other OSs
     (e.g., DOS FDISK, OS/2 FDISK)
  Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)

  Disk /dev/sdh: 128 heads, 32 sectors, 4252 cylinders
  Units = cylinders of 4096 * 512 bytes

     Device Boot   Begin    Start      End   Blocks   Id  System
  %  

  2. when trying to partition a mpath device with fdisk, it asks user to
  sed sectors and cylindes:

  % sudo fdisk /dev/mapper/mpath4
  You must set heads sectors and cylinders.
  You can do this from the extra functions menu.
  Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)

  Command (m for help): p

  Disk /dev/mapper/mpath4: 0 heads, 0 sectors, 0 cylinders
  Units = cylinders of 1 * 512 bytes

               Device Boot   Begin    Start      End   Blocks   Id
  System

  Command (m for help): n
  You must set heads sectors and cylinders.
  You can do this from the extra functions menu.

  Command (m for help):

  3.fdisk will show a wrong partition name:

  % ls /dev/mapper/mpath3-part1
  /dev/mapper/mpath3-part1
  % sudo fdisk /dev/mapper/mpath3
  You must set heads sectors and cylinders.
  You can do this from the extra functions menu.

  Command (m for help): p

  Disk /dev/mapper/mpath3: 0 heads, 0 sectors, 0 cylinders
  Units = cylinders of 1 * 512 bytes

               Device Boot   Begin    Start      End   Blocks   Id  System
  /dev/mapper/mpath31           63        2554287104277143551+  ee  Unknown

  Command (m for help):

  ---uname output---
  Linux dilllp1 3.19.0-22-generic #22~14.04.1-Ubuntu SMP Wed Jun 17 10:03:39 UTC 2015 ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = na 

  ---Debugger---
  A debugger is not configured

  ---Steps to Reproduce---
   1. install ubuntu 14.04.3 on a system which has mpath devices
  2. using "fdisk" to check mpath device:
  * fdisk -l <mpath device>
  * fdisk <mpath device> (partition the device)

  Userspace tool common name: fdisk(symbol link to pmac-fdisk) 

  The userspace tool has the following bit modes: 64-bit 

  Userspace package: pmac-fdisk, version: 0.1-16ubuntu2

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