Re: raid10,f2 Add a Controller: Which drives to move?

["Tomáš Dulík" <dulik@unart.cz>]

Stefan /*St0fF*/ Hübner napsal(a):
> I cannot quite understand your problem.  As every part of the array
> contains it's own metadata, it doesn't matter to md which /dev/sdX a
> drive is.  It might matter a bit for boot-time assembly, but actually
> that's what UUIDs are for.
>   
I know how UUIDs work.
My problem with device names is not a "critical", it's about "user 
friendliness" of the physical disk management.
If a disk fails and I receive email "A Fail event had been detected on 
md device /dev/md2. It could be related to component device /dev/sdd3", 
how will I know which disk should be replaced, if the device name is not 
fixed/persistent? Is it the disk in the first bay, or the second? Aside 
of the solution documented on the wiki page, I could also use try a 
simpler one based on the idea here:
http://www.outsidaz.org/blog/2009/11/05/identifying-failed-drives-via-udev-and-mdadm/

But for the disk management purposes, I prefer having the disk names 
fixed according the the disk bay position. So disk in bay nr. 1 is 
/dev/sda, bay nr. 2 is /dev/sdb, etc.

The wiki page I created is just about this. I haven't found any document 
like this anywhere else, so if it helps someone, I'll be glad.

Tom
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