Thanks, I need to try modified zpool than. On Nov 29, 2010, at 10:50 AM, taemun wrote:
> On 29 November 2010 20:39, GMAIL <piotr.jasiukaj...@gmail.com> wrote: > Does anyone use Seagate ST32000542AS disks with ZFS? > > I wonder if the performance is not that ugly as with WD Green WD20EARS disks. > > I'm using these drives for one of the vdevs in my pool. The pool was created > with ashift=12 (zpool binary from > http://digitaldj.net/2010/11/03/zfs-zpool-v28-openindiana-b147-4k-drives-and-you/), > which limits the minimum block size to 4KB, the same as the physical block > size on these drives. I haven't noticed any performance issues. These > obviously aren't 7200rpm drives, so you can't expect them to match those in > random IOPS. > > I'm also using a set of Samsung HD204UI's in the pool. > > I would urge you to consider a 2^n + p number of disks. For raidz, p = 1, so > an acceptable number of total drives is 3, 5 or 9. raidz2 has two parity > drives, hence 4, 6 or 10. These vdev widths ensure that the data blocks are > divided into nicer sizes. A 128KB block in a 9-wide raidz vdev will be split > into 128/(9-1) = 16KB chunks. > > Cheers, > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss -- Piotr Jasiukajtis | estibi | SCA OS0072 http://estseg.blogspot.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
