[QUOTE=summitflier;12808] If it’s HW RAID then it should pretty much be transparent to the OS.
I would assume the OS to see RAID array as one single disk.[/QUOTE]
Basically correct, but XFS has lots of tuning options to take optimum advantage of the hardware. It’s especially able to adopt to the physical layout of a RAID system, whether it’s hardware or software RAID.
Because I have no own hands-on experience in that area, I cannot judge the actual performance increase possible.
Do I use the default gui in Yast? Do I use XFS command line and if so which switches do I use?
If you want to just get XFS up&running, you can go the YaST route… but if you’re after the last deci-percent of performance, you’ll have to take things in your own hands. The man page has descriptions of the various tuning options available and a number of descriptive pages have been put up on the net by people that seem to have dealt with this intensively.