On Wed, Oct 25, 2006 at 12:48:29PM +0200, Patrick M. Hausen wrote: > You don't need to. > > If your bsdlabel partition is N sectors in size, the gmirror > object will have size N - 1. Newfs will not be able to write > to that last sector. You newfs the finished mirror device, > not the individual partitions.
Indeed. How stupid from me. Anyway, I created a gm device and a partition. Now the read performance is not what I'd expect. I have the partition on two SATA devices on different controlers. I get around 60MB/s for each disk. I can get that speed from both disks simultaneously. Now when I dd from the gm device, I don't get any speed higher than that. I tried with -b split -s <various sizes>, -b round-robin, -b load. (dd-ing as done with a bs of 1m; I see the transaction size is 128Kb, unless the split method is used, in which case the transaction size gies down. When round-robin is used, the transaction size is 128Kb/s, but the number of transaction per second goes down.). I cannot explain why I should not get a higher read speed. Anyone? -Guido _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
