I set up a Debian wheezy (7.6), installed openmediavault, and created a software RAID 5 with that. It is listed at `/dev/md127`.
Now I want to move that to a virtual XEN VM. To do so, I have to stop Debian to automatically assemble the RAID at startup, so I can put it through to the VM via `xm block-attach`, and I don't get that to work. No matter what I try, there is still `md127` listed under `/dev/`, and after every boot I can manually end it via `mdadm --stop /dev/md127`. But even after that, it is still listed under `/dev/`.

What I already tried:

* `/etc/mdadm/mdadm.conf`: commented out array line:

```
#ARRAY /dev/md0 metadata=1.2 name=masterbox:MainRaid UUID=3f620e6d:4e655d66:b931eb71:baf7cf3a  
ARRAY /dev/md0 name=Null

```
* moved `/libs/udev/rules.d/64-md-raid.rules` to `/root/`
* `update-initramfs u`
* commented out the line in `/etc/fstab`
* disassembled RAID manually via `mdadm --stop /dev/md127`
* set kernel parameter `raid=noautodetect` in `/etc/default/grub`: 

```
GRUB_CMDLINE_LINUX_DEFAULT="quiet raid=noautodetect"  

```
* rebooted
* disabled mdadm services at boot

Here's also the log from dmesg: 

```
[    3.448121] md: md127 stopped.
[    3.452518] md: bind<sda>
[    3.452747] md: bind<sdc>
[    3.452933] md: bind<sdb>

[    3.954794] md: raid6 personality registered for level 6
[    3.954797] md: raid5 personality registered for level 5
[    3.954799] md: raid4 personality registered for level 4
[    3.955417] bio: create slab <bio-1> at 1
[    3.955436] md/raid:md127: device sdb operational as raid disk 0
[    3.955439] md/raid:md127: device sdc operational as raid disk 2
[    3.955442] md/raid:md127: device sda operational as raid disk 1
[    3.955740] md/raid:md127: allocated 3228kB
[    3.955988] md/raid:md127: raid level 5 active with 3 out of 3 devices, algorithm 2
[    3.955991] RAID conf printout:
[    3.955993]  --- level:5 rd:3 wd:3
[    3.955996]  disk 0, o:1, dev:sdb
[    3.955999]  disk 1, o:1, dev:sda
[    3.956000]  disk 2, o:1, dev:sdc
[    3.956044] md127: detected capacity change from 0 to 6000916561920

```

... How can I bring Debian to not touch the RAID drives *at all*, so I can pass them to my VM?