Re: Install grub on nvdia dmraid10 ?

I Had written a FAQ for this specific case. It was meant for standard
Software Raid - but can be IMHO superposed to DM_Raid without a problem.
Check out:
http://www.solsys.org/mod.php?mod=faq&op=match&display_order=section&section=Linux&display_option=expand#96

It is rather a how can I boot from the second Drive of a SATA Raid-1
system - but ithas some explanations that are required to understand the
setup.


Darrick J. Wong wrote:
> Thomas Backlund wrote:
>> Hi,
>> has anyone successfully installed grub on a nvidia dmraid10 ?
>>
>> I have a setup of 4 160GB disks configured through bios to do raid10,
>> made the partitions under WinXP with Partition Magic and I can access
>> the /dev/mapper/nvidia_* partitions just fine from a livecd as they are
>> correctly identified with dmraid -ay...
> 
> afaik, grub doesn't know how to determine which dm devices map back to
> BIOS devices.  You can manually set up a mapping in the grub shell:
> 
> device (hd0) /dev/mapper/blah
> 
> ...though you'll want to specify the device's BIOS geometry via "dmsetup
> setgeometry c h s" first.  At some point I'll patch dmraid to do this
> automatically (unless someone beats me to it ;)).
> 
> Note that for an installed system you can put "(hd0) /dev/mapper/blah"
> in /boot/grub/device.map.
> 
> --D
> 
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