[Bug 215542] Re: mdadm --create with typo overwrites device file

[Dmitrijs Ledkovs]

On 19/06/12 19:08, raas wrote:
> I'd expect the bug to be closed when the problem is fixed, or the mdadm
> package is deprecated. Is either of these the case?
> 

Sorry for misunderstanding, let me explain.
There was an indication earlier in the bug report that 3.1 series or
later fix the problem. I have pointed out that newer mdadm is available
in a few releases now, and wanted to check with all affected people if
the problem is still there.

-- 
Regards,
Dmitrijs.

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https://bugs.launchpad.net/bugs/215542

Title:
  mdadm --create with typo overwrites device file

Status in “mdadm” package in Ubuntu:
  Confirmed

Bug description:
  I forgot to specify the new MD device to mdadm when creating a new
  array, resulting in an error message:

  # mdadm --create --level=raid1 --chunk=64  --raid-devices=2 /dev/hdb /dev/hdc
  mdadm: You haven't given enough devices (real or missing) to create this array

  but also resulting in the device file for "/dev/hdb" going AWOL:

  root at yggdrasil:~# ls -la /dev/hd*
  brw-rw---- 1 root cdrom  3,   0 2008-04-10 18:52 /dev/hda
  brw-rw---- 1 root disk   9, 127 2008-04-11 09:43 /dev/hdb
  brw-rw---- 1 root disk  22,   0 2008-04-10 18:52 /dev/hdc
  brw-rw---- 1 root cdrom 22,  64 2008-04-10 18:52 /dev/hdd

  Please check arguments before doing anything to files or devices :-/
  2.6.2-1ubuntu2, ubuntu gutsy.

  cheers,
  Andras

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