Date: Fri, 02 Jan 2009 14:33:33 +0100 From: Frederique Rijsdijk <frederique@isafeelin.org> To: freebsd-questions@freebsd.org Subject: Using HDD's for ZFS: 'desktop' vs 'raid / enterprise' -edition drives? Message-ID: <495E17AD.30707@isafeelin.org>
next in thread | raw e-mail | index | archive | help
Hi freebsd-questions, For personal use (photo/video storage), I'm looking into creating a huge single ZFS (raidz) volume that will replace my current collection of drives used as storage. I'm thinking 4*1TB drives in RAID5(z). My question is regarding the flavour of drivers that one can choose from: Desktop class drives, or the so called RAID/Enterprise class drives. The difference between the two being the way such a drive handles the bad-sector/block handling and remapping. I understand that Desktop class drives do all this internally, and this is a process that can take up to >60s (even minutes on some), and during this process the drive is unavailable to the controller. The RAID edition drives all appoach this differently and alot faster, typically before 8 seconds. How does ZFS handle this? Should I be looking for the RAID class drives or can Desktop class drives be used here? My worry is of course that such a drive (destkop class) will be marked defective and thrown out of the raid volume if a remapping of bad sectors occurs and the drive will be unresponsive to the controller/ZFS for > 8 seconds. Some drives can be configured in this area, but not all, and there's quite a price difference in the two, the desktop class being up to 50% cheaper in some cases.. Anybody that can shed some light on this? Thanks, -- Frederique
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?495E17AD.30707>