On Fri, 21 Mar 2014, Matthew Mabis wrote:
I know the drive itself does 512b emulation but i would rather run 4K if theres a performance increase!
Does Illumos really have a "4k" path? It is my impression that knowledge of "4k" influences offsets and allocated block sizes but that otherwise things are really still done in terms of 512 byte sectors.
A drive which can only support I/O in 4k sectors would not be very usable on most systems.
Regardless, I can not imagine why someone would want to replace 2TB drives with 4TB drives. The resilver rate is no better with the 4TB drive than with the 2TB drive so the time to resilver is doubled and there are limits to what is tolerable. I/O performance would not improve and in fact it may diminish with the larger drives. It is much better to add more spindles to the pool (i.e. another raidz2 vdev).
Bob -- Bob Friesenhahn [email protected], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ OmniOS-discuss mailing list [email protected] http://lists.omniti.com/mailman/listinfo/omnios-discuss
