On 19/02/2013 9:15 AM, Roy Sigurd Karlsbakk wrote:

quoted

that's like BASE jumping with a large umbrella, as earlier noted.
Don't do that, it'll just hurt you. At least use RAID-5 and preferably
use more RAID sets and RAID-0 or LVM on top.

Make that RAID-6

I agree. I think a more sane outlook on this would be 19 drives made up of:
	* RAID Level: 6
	* Hot Spares: 2

Using RAID5 then its not a matter of if you are going to lose your 
array, its a matter of WHEN considering the number of spindles here.

If you have the drives in separate enclosures or different controllers, 
have one spare per controller - ie don't but both spares on the same 
controller.

*Maybe* if you are pushed for space, only use 1 hot spare - but be sure 
to have a drive sat in the anti-static bag on a shelf within walking 
distance of the server.

--
Steven Haigh

Email: netwiz@crc.id.au
Web: https://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897
Fax: (03) 8338 0299