On Monday 10 September 2007 22:35:30 Iustin Pop wrote: > On Mon, Sep 10, 2007 at 10:29:30PM +0300, Dimitrios Apostolou wrote: > > Hello list, > > > > I just created a RAID1 array consisting of two disks. After experiments > > with processes *reading* from the device (badblocks, dd) and the iostat > > program, I can see that only one disk is being utilised for reading. To > > be exact, every time I execute the command one of the two disks is being > > randomly used, but the other one has absolutely no activity. > > > > My question is: why isn't load balancing happening? Is there an option > > I'm missing? Until now I though it was the default for all RAID1 > > implementations. > > Did you read the archives of this list? This question has been answered, > like, 4 times already in the last months. > > And yes, the driver does do load balancing. Just not as RAID0 does, > since it's not RAID0. Of course I did a quick search in the archives but couldn't find anything. I'll search better, thanks anyway. Moreover, I think I found the answer in the code after posting. There is a comment somewhere in read_balance() saying "Don't change to another disk for sequential reads". I have to study it a bit to figure out *why* you chose that way. Thanks, Dimitris - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
