Bug#684708: mdadm: support external metadata arrays correctly

[Miquel van Smoorenburg]

On 13.08.2012 14:10, Miquel van Smoorenburg wrote:
> Package: mdadm
> Version: 3.2.5-1
> Severity: serious
> Tags: patch wheezy sid
>
> The initramfs hook supplied by mdadm doesn't install mdmon. Also, mdmon
> is not included in the .udeb for the installer.

Here is a revised patch. I proposed the patch to mdmon.c (to symlink the 
pidfile into /run/sendsigs.omit.d/) on the linux-raid mailinglist, and 
Neil Brown remarked "why not do that in an init script just before 
sendsigs runs". Which is ofcourse a good idea, no changes to mdmon.c 
required, just 3 lines added to /etc/init.d/mdadm.

I was careful to ensure that if you do not have a raid device with 
external metadata, this patch does exactly nothing. And on systems with 
a raid device with external metadata it will enhance data integrity due 
to /etc/init.d/mdadm-waitidle.

Thanks,

Mike.