[CentOS] Read performance on software RAID1?

Thu Apr 12 16:55:14 UTC 2007
John R Pierce <pierce at hogranch.com>

WipeOut wrote:
> 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?

reads are distributed to both drives.   the kernel raid implementation 
is considerably more sophisticated about this than the typical 
bios/driver based fake raid.