Also seeing 2 x quad-core system slower that 2 x dual core

[Andreas Pettersson]

Claus Guttesen wrote:
> could either replace my 10K rpm drives (in raid 1+0) with 15K ditto
> which would require a downtime which we could not afford at this tim

I have several times successfully upgraded mirrored volumes with new 
disks without any downtime at all. Just change one disk, let the mirror 
rebuild, change the other disk, wait for rebuild again, tell the logical 
drive to present all the new space and then extend the filesystem. No 
downtime.

-- 
Andreas