[CentOS] Re: Read performance on software RAID1?

WipeOut spake the following on 4/12/2007 9:38 AM:

Hi,

Since the data is available in two places on a RAID1 array does the code in any way make use of that for improved performance by reading (different) data form both disks at the same time? Or is the one disk simply a slave that just receives copies of the data and is never really read from at all?

Thanks

AFAIR asks for the data from the raid device, and the md code sends the request to both drives. The drive that replies with data first is the winner. So the system would be reading staggered by that method. Now writes are a different story.