On Sat, Aug 06, 2011 at 07:45:31PM +0200, Roy Sigurd Karlsbakk wrote: > > Might this be the SATA drives taking too long to reallocate bad > > sectors? This is a common problem "desktop" drives have, they will > > stop and basically focus on reallocating the bad sector as long as it > > takes, which causes the raid setup to time out the operation and flag > > the drive as failed. The "enterprise" sata drives, typically the same > > as the high performing desktop drive, only they have a short timeout > > on how long they are allowed to try and reallocate a bad sector so > > they don't hit the failed drive timeout. Some drive firmwares, such as > > older WD blacks if memory serves, had the ability to be forced to > > behave like the enterprise drive, but WD updated the firmware so this > > is longer possible. > > > > This is why you see SATA drives that typically have almost identical > > specs, but one will be $69 and the other $139 - the former is a > > "desktop" model while the latter is an "enterprise" or "raid" specific > > model. I believe it's called different things by different brands: > > TLER, ERC, and CCTL (?). > > I doubt this is about the lack of TLER et al. Some, or most, of the drives > ditched by ZFS have shown to be quite good indeed. I guess this is a WD vs > Intel SAS expanders issue >
What exact chassis / backplane / SAS-expander is that? (with Intel SAS expander). -- Pasi _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
