On 11/26/2013 06:32 PM, Dmitrijs Ledkovs wrote:

On 26 November 2013 18:07, David F. [off-list ref] wrote:

quoted

As a workaround to the mdadm issue with the spare drive we were going
to have them activate DMRAID but that ends up with the information
below.  Specifically something about dm-raid45 but we had to drop that
because it no longer compiles in the latest kernels and we couldn't
find an update that would.   Any ideas?  (still working on getting the
dump - the fact that tmpfs doesn't support sparse files makes having
the customer create the dump via a script we provide a bit more
involved):

Ubuntu kernels still somewhat maintain and have dm-raid-45 module.

Install linux-image-extra-virtual package which will pull in correct
versioned packaged with extra modules.

It is planned however to migrate off & drop dm-raid-45 module soon.

ps. latest version I can find is
3.8.0-22-generic/kernel/ubuntu/dm-raid4-5/dm-raid45.ko

Regards,

Dmitrijs.

As a follow up to this general subject, what will replace the dm-raid45
module after it is dropped?

I guess another way to ask that question is what functionality does the
dm-raid45 module support that is not currently supported by the dm-raid
module, which has aliases to dm-raid1, dm-raid4, dm-raid5, dmraid6, and
dm-raid10.

And is it already possible now (in recent kernels such as 3.11.x and
later) to use the dm-raid module in place of dm-raid45?