[Grml] how to recognize each RAID member separately

Michael Prokop mika at grml.org
Wed Oct 11 00:28:42 CEST 2017

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* josefh.maier at hushmail.com [Sat Oct 07, 2017 at 01:56:04PM +0200]:

> I tried to make a backup of a HP DL380 G5 (W28K) with a HP Smart Array
> P400 controller with 4 RAID-members (4 75GB SAS drives)
> The Linux Live DVD's and Acronis TrueImage i' am unsing, do show that
> 4 disks as a singe LUN :-(

> To my knowledge such "Single-LUN backups" can make problem if they
> should be restored if a harddisk is changed before... 

> Therefore i would feel much more comfortable, if  from each harddirve
> could be made a separate DD-image.
> Question:
> Is there a way to have GRML seen that 4 disks as separate disks (and
> NOT as a single LUN)?
> Thank you very much for every feedback!

If you are seeing the 4 disks as just one (also see
http://hwraid.le-vert.net/wiki/SmartArray) then not that I'd be
aware of, AFAICT you have to remove the disks from the RAID
controller and attach them without the RAID controller in between.

Though if a harddisk gets broken in your RAID setup and you depend
on a raw disk backup of all involved disks then maybe you chose the
wrong RAID approach/level and/or backup strategy? :) For sure it can
make sense to clone a single disk from the RAID setup *when* needed,
but then you remove it from the RAID (controller) anyway?

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