hello all !...my problem is not the same...or...the same...not sure if not the 
same (sorry my bad english)
main controller is AMD SB950 via MSI 990FXA-GD80...2 disk - raid 0 
(fakeraid)...windows 7 install correctly and working...ubuntu is not install 
and not finding anny raid-0. Pmagic-2015-05-30 is not correct mapping this 
array (using boot option dmraid ...module dm-mod is load from kernel):

ls -l /dev/mapper/*
crw------- 1 root root  10, 236 maj 31 02:04 control

and not find anny /dev/dm-0(1,2,3*)

can use "dmraid -ay" is finding:

root@PartedMagic:~# ls -l /dev/mapper
total 0
crw------- 1 root root  10, 236 maj 31 02:04 control
brw-rw---- 1 root disk 254,   0 maj 31 02:04 ddf1_Linux
root@PartedMagic:~# ls -l /dev/dm*
brw-rw---- 1 root disk 254, 0 maj 31 11:14 /dev/dm-0
root@PartedMagic:~# 

and

bash-4.1# dmraid -s
/dev/sdb: "pdc" and "ddf1" formats discovered (using ddf1)!
/dev/sda: "pdc" and "ddf1" formats discovered (using ddf1)!
*** Group superset .ddf1_disks
--> Active Subset
name   : ddf1_Linux
size   : 3906722560
stride : 128
type   : stripe
status : ok
subsets: 0
devs   : 2
spares : 0
bash-4.1# 


not finding installed windows 7...only:

bash-4.1# ls -l /dev/sd*
brw-rw---- 1 root disk    8,  0 maj 31 11:20 /dev/sda
brw-rw---- 1 root disk    8,  1 maj 31 02:04 /dev/sda1
brw-rw---- 1 root disk    8,  2 maj 31 02:04 /dev/sda2
brw-rw---- 1 root disk    8, 16 maj 31 11:20 /dev/sdb

My qeustion...if use this fix
http://answerpot.com/showthread.php?3532655-Changing%20from%20dm-
raid45.ko%20to%20dm-raid.ko for ubuntu boot process ... ubuntu install
correctly and finding more OS ? (ubuntu + windows 7)

latest fix multipath-tools and dmraid dmsetup and kpartx is fixing only
if use for fakeraid = raid-5(and 1,4,6,10)...how use if fakeraid =
raid-0 on this controller ?

???
???
???

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https://bugs.launchpad.net/bugs/992975

Title:
  multipath-tools incompatible with dmraid

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