[CentOS-docs] Updated How to Setup a Software RAID on CentOS 5

Ned Slider ned at unixmail.co.uk
Wed Apr 29 08:55:50 UTC 2009

Phil Schaffner wrote:
> I have attempted to address all comments:
> http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5
> Give me your best shot! :-D
> Phil

Nice job Phil :)

/remembering my disclaimer/ I'm not a raid/grub expert...

Presumably Section two is required because grub is installed to the mbr 
of /dev/sda so /dev/sdb isn't bootable in the event /dev/sda should fail?

Would using grub be simpler rather than directly editing 
/boot/grub/device.map ? Something like...

Following on from Section 1, reboot...

Stop at the grub menu and enter the "c" option, which gives you the grub
prompt. Then:

grub> device (hd0) /dev/sda
grub> root (hd0,0)
grub> setup (hd0)
grub> device (hd1) /dev/sdb
grub> root (hd1,0)
grub> setup (hd1)
grub> exit

and test both disks are bootable. Achieves the same thing I guess.

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