Re: Software RAID5 with 2.6.0-test

[Jakob Oestergaard <jakob@unthought.net>]

On Fri, Oct 17, 2003 at 09:18:24PM +0200, Måns Rullgård wrote:
> Samuel Flory <sflory@rackable.com> writes:
...
> >    many clock cycles availble to it.  It's even worse when you realize
> >    the 2Ghz xeon is a better proccessor in many more ways than just
> >    clock cycles.
> 
> How about this logic:
> 
> 1) If the processor on the RAID controller can handle the full
> bandwidth of the disks, it's fast enough.
> 2) If someone else does the 10% work, the CPU can do 10% more work.

3) You have a four year old machine - one day the RAID controller dies.
   The company that produced it has been acquired by someone else, and
   the product is no longer availble.  Can you get a new adapter with
   firmware that can actually read your disks?   Or are your data lost?
   Can you find a replacement controller on e-bay?  And would you want
   to?


Anyway, not wanting to spread more FUD than stricly necessary: It's a
matter of cost/benefit and risk management.   Everyone has their
personal preferences on this - and even if it wasn't so, let's not
begin to pretend that there is a simple answer to what's "best".

-- 
................................................................
:   jakob@unthought.net   : And I see the elder races,         :
:.........................: putrid forms of man                :
:   Jakob Østergaard      : See him rise and claim the earth,  :
:        OZ9ABN           : his downfall is at hand.           :
:.........................:............{Konkhra}...............: