Re: more mdadm questions

[maarten <maarten@ultratux.net>]

On Wednesday 01 September 2004 02:13, rich turner wrote:

Hi Rich,

Not wanting to be blunt an all...   but wouldn't most of these questions be 
answered by just running mdadm yourself...?

> when mdadm queries information about the raid devices, does it simply
> get the imformation from /proc/mdstat and format it accordingly?

My guess would be no, since /proc/mdstat gives less info than mdadm does.

> how does mdadm know what devices to query if they are not defined in
> /etc/mdadm/mdamd.conf with DEVICES?

Don't know how, but since 'mdadm --detail --scan' provides the info you can 
use to create the mdadm.conf file when missing, mdadm obviously does not rely 
on getting its info from that file at all. 

> if devices are missing from the raid device, is there a way of knowing
> the name of the missing device without the configuration file?

Yes.  Well, it depends on what you call "missing".  It will report a failed 
etc device, but if the array was created with a 'missing' drive it obviously 
cannot know what device will get added before you actually add it.

greetings,
Maarten

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