On Jul 19, 2011, at 12:29 PM, Ivan Voras wrote: >> Is there something in FreeBSD which is preventing you from using the drive's >> native DEV_BSIZE of 4096 bytes, or is it that the drive claims to have a >> physical block size of 512 bytes when it is really 4k? > > Nope, "only" that.
:-) It's nice to have well-defined problems-- although it's perhaps not so nice when hardware is compelled to lie about its status because of backwards-compatibility (C/H/S vs LBA comes to mind also). > The current state of the matter (i.e. for 9.0) is: > > * The new ATA driver has quirks for certain models of HDDs which have this > false advertising (which can be manually triggered by > kern.cam.ada.X.quirks=1) which causes the drive to report stripesize of 4k. > > * This information is used in gpart to size & align partitions; it will be > used by the new installer > > * Default fragment size for UFS was raised to 4K so it will be aligned by > default. Excellent; thanks for the detailed reply. Regards, -- -Chuck _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
