7:29 a.m.
I was unsure whether to post this feature request on the bugzilla
or here, and since I found no feature request queue; here it is.
In F11 (and previous), dm-raid works great on a great number
of controllers, also the highpoint 1820 controller that my wife has.
However it does not work if you have a raid5 array that you want
to use. She just converted to Linux from Windows and wants to have
access to her data. I have tried to compile the kernel module myself,
but I am at a total loss as to how to achieve this without rolling a
complete custom kernel.
So, I want to request this kernel module in the hopes that someone
will want to make a package for it and maintain the package.
The module itself seems well maintained by redhat and resides here:
http://people.redhat.com/~heinzm/sw/dm/dm-raid45/
I ask here because the fedora people have said in no uncertain terms
that they do not want to include it until it is in upstream.
See: https://bugzilla.redhat.com/show_bug.cgi?id=498544 (among others)
On the other hand, RHEL/Centos seems to have the module included.
But that doesnt really help a whole lot.
This package would make it possible for dmraid to support raid4/5 on
most low-end/onboard controllers supported by dmraid today afaict.
Sincerly
Hans Kristian Rosbach
8:11 a.m.
On 04.06.2009 09:29, Hans Kristian Rosbach wrote:
I was unsure whether to post this feature request on the bugzilla
or here, and since I found no feature request queue; here it is.
Not much time for a long answer right now, but here is a short one: It
maybe impossible to do what you want (not sure, haven't looked that
close at the patch), but even if not it's likely a bad idea, as
dm-raid45 will be needed quite early during boot which leads to all
sorts of interesting problems and corner cases.
Maybe asking the Kernel-Developers in Fedora to integrate raid45 might
be a good idea and the first step. Normally they are quite reluctant to
include out-of-tree code, but the code is maintained by a RH developer
and the feature afaics is in RHEL, so it might be a bit different in
this case.
CU
knurd
8:29 a.m.
On Thu, 2009-06-04 at 10:11 +0200, Thorsten Leemhuis wrote:
On 04.06.2009 09:29, Hans Kristian Rosbach wrote:
> I was unsure whether to post this feature request on the bugzilla
> or here, and since I found no feature request queue; here it is.
Not much time for a long answer right now, but here is a short one: It
maybe impossible to do what you want (not sure, haven't looked that
close at the patch), but even if not it's likely a bad idea, as
dm-raid45 will be needed quite early during boot which leads to all
sorts of interesting problems and corner cases.
Maybe asking the Kernel-Developers in Fedora to integrate raid45 might
be a good idea and the first step. Normally they are quite reluctant to
include out-of-tree code, but the code is maintained by a RH developer
and the feature afaics is in RHEL, so it might be a bit different in
this case.
If it is not possible, then that is fine.
But I am not thinking about using the raid as a boot/system drive.
The problem we have at the moment is that there is no way to get at
the data at all from fedora. The 6 disks in raid5 were used as a data
store and for backups, but at the moment we'd have to reinstall windows
on that computer in order to get access to the data at all.
Having a 3rd party kernel module that could be loaded dynamically or
even manually would make it possible to access the data in order to
back it up and migrate to running md-raid instead.
If the module would allow anything more it would be great, but even
just read-only functionality would be awesome for those trapped by
this problem.
There are also hpt18xx highpoint (open source and closed source)
modules that can be built given just the kernel headers, but
unfortunately those are so out-of-date that they do not compile
against newer kernels. So atleast for us, that solution is out.
Sincerly
Hans K. Rosbach
12:51 p.m.
Hans Kristian Rosbach wrote:
The module itself seems well maintained by redhat and resides here:
http://people.redhat.com/~heinzm/sw/dm/dm-raid45/
This appears to require patching the kernel itself, not just building a
module.
Kevin Kofler
5463
days inactive
5463
days old
rpmfusion-developers@lists.rpmfusion.org
3 comments
3 participants
participants (3)
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Hans Kristian Rosbach -
Kevin Kofler -
Thorsten Leemhuis