Kernel 2.6.13 is hiding devices from /dev [Was Why is the kernel hiding drbd devices?}

Kernel 2.6.13 is hiding devices from /dev [Was Why is the kernel hiding drbd devices?}

[Maurice Volaski]

The kernel module drbd (version 0.7.13) can no longer find its 
devices (e.g., /dev/drbd0, /dev/drbd1) in kernel 2.6.13. The version 
of udev I am using 065/068 didn't make a difference. It works fine 
with kernel 2.6.12.5 and 2.6.12.6.
-- 

Maurice Volaski, mvolaski@aecom.yu.edu
Computing Support, Rose F. Kennedy Center
Albert Einstein College of Medicine of Yeshiva University

Re: Kernel 2.6.13 is hiding devices from /dev [Was Why is the kernel hiding drbd devices?}

[Lee Revell]

On Tue, 2005-09-06 at 17:13 -0400, Maurice Volaski wrote:
> The kernel module drbd (version 0.7.13) can no longer find its 
> devices (e.g., /dev/drbd0, /dev/drbd1) in kernel 2.6.13. The version 
> of udev I am using 065/068 didn't make a difference. It works fine 
> with kernel 2.6.12.5 and 2.6.12.6.

What is drbd?  An out of tree driver?  Did it work with 2.6.13-rcX?  If
not, why didn't they tell us sooner?  Does it expect devfs to be present
in the kernel by any chance?

Lee

Re: Kernel 2.6.13 is hiding devices from /dev [Was Why is the kernel hiding drbd devices?}

[Maurice Volaski]

>What is drbd?  An out of tree driver?  Did it work with 2.6.13-rcX?  If

Yes, it implements RAID 1 across two computers over a network link in 
realtime. Generally, you combine with a program called heartbeat to 
implement high-availabilty failover. It's very neat ;-)

>not, why didn't they tell us sooner?  Does it expect devfs to be present
>in the kernel by any chance?


It's actually working now. Don't ask me to explain it because last 
night and most of Monday I couldn't get it working and I must have 
compiled half a dozen different Gentoo kernel versions of 2.6.12, and 
it worked with some but not others. It worked perfectly with the 
official 2.6.12 but not with official 2.6.13. Then suddenly it just 
started to work again on all the Gentoo 2.6.12s it wouldn't work with 
and also with the official 2.6.13. I have 2.6.13 running right now, 
and drbd devices show up in /dev as if there never had been any 
problem.
-- 

Maurice Volaski, mvolaski@aecom.yu.edu
Computing Support, Rose F. Kennedy Center
Albert Einstein College of Medicine of Yeshiva University

Re: Kernel 2.6.13 is hiding devices from /dev [Was Why is the kernel hiding drbd devices?}

[Lee Revell]

On Wed, 2005-09-07 at 00:45 -0400, Maurice Volaski wrote:
> >What is drbd?  An out of tree driver?  Did it work with 2.6.13-rcX?  If
> 
> Yes, it implements RAID 1 across two computers over a network link in 
> realtime. Generally, you combine with a program called heartbeat to 
> implement high-availabilty failover. It's very neat ;-)

They should get it merged then.  Anyway, I'm glad it's working...

Lee

Kernel 2.6.13 is NOT hiding devices from /dev [Was Why is the kernel hiding drbd devices?}

[Lars Ellenberg]

/ 2005-09-07 01:03:00 -0400
\ Lee Revell:
> On Wed, 2005-09-07 at 00:45 -0400, Maurice Volaski wrote:
> > >What is drbd?  An out of tree driver?  Did it work with 2.6.13-rcX?  If
> > 
> > Yes, it implements RAID 1 across two computers over a network link in 
> > realtime. Generally, you combine with a program called heartbeat to 
> > implement high-availabilty failover. It's very neat ;-)
> 
> They should get it merged then.  Anyway, I'm glad it's working...

will do, once we have it (or, the next generation of it) in shape.
maybe this year, probably next spring/summer ...

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