[Bug 579866] Re: 10.04 and 10.10 Install formatted ext3 partition (data lost)

[sithlord48]

This JUST happened to me w/ the 11.10 daily build (kubuntu 8.5.11)  the
drive simply contains a / , swap , and /home partitons in that order.
disk is a MBR scheme. the swap and /home are logical partitons  with the
/ being a primary partition. i chose to format the / partition,(was
running 10.10 already). and when it finally booted i found my /home
partition had also been formated . both / and /home were already ext4
partitions.

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Title:
  10.04 and 10.10 Install formatted ext3 partition (data lost)

Status in Ubiquity:
  New
Status in “ubiquity” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: ubiquity

  I have installed 10.04 yesterday. My system already had running 9.10
  with following partitions.

   /          (ext4)
   /home (ext3)

  While installing I chose to format / and not to format /home but
  chosen wrong partition type for /home i.e. ext4. Install was smooth
  but I realized that installer actually had formatted (or converted ?)
  my ext3 /home to ext4 /home wiping out all the data. I think even if I
  have specified ext4 by mistake, why should installer format my
  partition when I have specifically not asked for it. At the most it
  should try to mount it as ext4 and the bell out.

  I don't know what would you do in order to fix this but it would be
  great help if there is a way to undo this. This has hit more people I
  guess, see http://ubuntuforums.org/showpost.php?p=8195037&postcount=1
  . Also I am following good
  https://help.ubuntu.com/community/DataRecovery .

  Thanks for all the good work guys but this particularly is very scary.

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