Ed and Steve, Thanks for the clarifications. Since I am using direct attached ESCON, I don't have any preferred paths. All the paths are online and attached.
I could never find any manual that stated one way or the other if there was any improvement or not. Thanks Steve for clearing that up. On Wed, 25 Jun 2008 14:45:08 -0400 Steve Wilkins said: > >The number of control units doesn't make a difference to VM. From a >performance perspective, just make sure you always have at least 1 >preferred path on-line to each DS6000 disk. > >Steve Wilkins >z/VM I/O Strategy >
