[Linux-cluster] Re: GFS on md on shared disks?

[Ed L Cashin]

Jonathan E Brassow <jbrassow at redhat.com> writes:

> Hardware raid is fine, but software raid has it's limitations in this
> space.
>
> If you can ensure that there will be no failures (in which case, you
> wouldn't be using raid5), and that the devices are always in the same
> order, etc -then go ahead.
>
> If you have one machine that has a failure on a drive, only this
> machine will do the appropriate thing - leaving the others with a view
> of the device that is inconsistent with that of the machine on which
> the failure took place.  This is the fundamental problem.

Doh!  I was only thinking of the common case.  Thanks.  

-- 
  Ed L Cashin <ecashin at coraid.com>