To obtain the ashift value for a pool, try # zdb <NAME OF POOL> | grep ashift
I've had a terrible experience with my 2TB WD Caviar Green, only recently improved by separating it from the mirror I had and using it as a long term backup unit after formatting with a modified version of zpool, called zpool-12, which sets the proper ashift value. I think you could get around this issue to use the disk for a normal pool, where the whole disk is formatted using EFI, but rpool does not use this setup and instead creates a Solaris partition containing the filesystem. I hope I am wrong inthis, since 4k drives are becoming more common and can apparently be a real b### to work with if you want some performance out of them. All of this to better support Windows XP (rolleyes) Bryan On May 14, 2012 9:01 AM, "Hans J. Albertsson" < hans.j.alberts...@branneriet.se> wrote: > I have an OI151a4 system with old 500GB disks in a mirrored pair for the > rpool, and no further disks. > For various reasons I'd like to expand the available space by replacing > the 500GB disks with 2TB disks. > I'd like to do this IN-PLACE, but I see a few problems in that the new > disks are naturally 4K blocksize, but falsely report 512 byte blocksize. > > First: Can you ever efficiently migrate a zpool with ashift=9 to a 4k > block disk by just adding the new disk as a 3rd mirror? Regardless of what > blocksize the disk reports? > > Second: Can you manage the problem of the false blocksize report in a > situation like this? > > Third: How can one check to see what parameters (like ashift( a > particular pool uses? > > ______________________________**_________________ > OpenIndiana-discuss mailing list > OpenIndiana-discuss@**openindiana.org<OpenIndiana-discuss@openindiana.org> > http://openindiana.org/**mailman/listinfo/openindiana-**discuss<http://openindiana.org/mailman/listinfo/openindiana-discuss> > _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
