[Bug 1006805] Re: RAID1 with spare preseed error

[Stan A.]

I came across this while also trying to set up a 2-drive RAID1 with a
spare. Weird that this has been opened this long.

I looked through documentation as well as partman source (learned spares
is 7th argument) and realized this is not a bug, just wrong syntax on
your part. The spare has to be put in its own separate list, so just add
a space instead of a # for your last drive/spare device(s) thereby
separating it from the devices meant for the array, e.g.:

'''
1 2 1 ext4 / /dev/sda1#/dev/sdb1 /dev/sde1
'''

>From the Partman Wiki:
<raidtype> <devcount> <sparecount> <fstype> <mountpoint> <devices> <sparedevices>

Hope this helps whoever googles this next time.

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https://bugs.launchpad.net/bugs/1006805

Title:
  RAID1 with spare preseed error

Status in preseed package in Ubuntu:
  New

Bug description:
  If I try to preseed a RAID with spare I receive an error:
  mdadm: You have lister more devices (4) than in the array (3)!

  The relevant part of the pressed file contains:
  d-i partman-auto-raid/recipe string           \
          1 2 1   ext4  /                                              \
                  /dev/sda1#/dev/sdb1#/dev/sde1  \
                  .

  If I do not specify spare there is no error.
  d-i partman-auto-raid/recipe string          \
          1 2 0   ext4  /                                            \
                  /dev/sda1#/dev/sdb1                    \
                  .

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