udev and mdX where X > 0

udev and mdX where X > 0

[Phil Dibowitz]

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This has been discussed previously on the list:

http://sourceforge.net/mailarchive/message.php?msg_id=8778276

But I'm not really clear on a solution here - how do I get udev to
create /dev/md1 for my second raid array.

I found a page that mentioned adding (in debian) the following to
/etc/udev/links.conf:

  M md1           b 9 1

Which appears to work, but given the text at the top of the file:

  # This file does not exist. Please do not ask the debian maintainer
about it.
  # You may use it to do strange and wonderful things, at your risk.

This is probably not the "right" way to do it - not only is that file
Debian-specific (best I can tell), it's, I'm guessing, interpreted by a
script that writes out proper udev rules.

So what's the "right" way to tell udev "hey, I need md1, always" ?

Thanks,
--
Phil Dibowitz                             phil@ipom.com
Freeware and Technical Pages              Insanity Palace of Metallica
http://www.phildev.net/                   http://www.ipom.com/

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
 - Benjamin Franklin, 1759


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Re: udev and mdX where X > 0

[Marco d'Itri]

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On May 13, Phil Dibowitz <phil@ipom.com> wrote:

> So what's the "right" way to tell udev "hey, I need md1, always" ?
Either use RAID devices autostart or fix the kernel driver.

-- 
ciao,
Marco

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Re: udev and mdX where X > 0

[Phil Dibowitz]

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Marco d'Itri wrote:
> On May 13, Phil Dibowitz <phil@ipom.com> wrote:
>
>
>>So what's the "right" way to tell udev "hey, I need md1, always" ?
>
> Either use RAID devices autostart or fix the kernel driver.

What do you mean by "RAID devices autostart"? I'm using the in-kernel
autodetection... it finds my RAID devices just fine... but without the
aforementioned hack, it errors on /dev/md1 not existing.

--
Phil Dibowitz                             phil@ipom.com
Freeware and Technical Pages              Insanity Palace of Metallica
http://www.phildev.net/                   http://www.ipom.com/

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
 - Benjamin Franklin, 1759


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Re: udev and mdX where X > 0

[Marco d'Itri]

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On May 13, Phil Dibowitz <phil@ipom.com> wrote:

> What do you mean by "RAID devices autostart"? I'm using the in-kernel
> autodetection... it finds my RAID devices just fine... but without the
I don't think so, or the devices would be created.

-- 
ciao,
Marco

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Re: udev and mdX where X > 0

[Phil Dibowitz]

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Marco d'Itri wrote:
> > What do you mean by "RAID devices autostart"? I"m using the
> > in-kernel autodetection... it finds my RAID devices just fine... but
> > without the
>
> I don"t think so, or the devices would be created.

Oh, I stand corrected - the raid-tools init scripts were doing it.

I started using auto-detection and the devices are created. Excellent.

Thanks.

-- 
Phil Dibowitz                             phil@ipom.com
Freeware and Technical Pages              Insanity Palace of Metallica
http://www.phildev.net/                   http://www.ipom.com/

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
 - Benjamin Franklin, 1759


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