From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roy Sigurd Karlsbakk Subject: Re: Checksumming RAID? Date: Wed, 28 Nov 2012 18:51:50 +0100 (CET) Message-ID: <28168570.25.1354125110341.JavaMail.root@zimbra> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Drew Cc: Chris Murphy , Linux Raid List-Id: linux-raid.ids > > That doesn't make sense. Nearline and enterprise drives are large > > 7k2 drives that come in consumer and enterprise models, such as > > Hitachi Deskstar and Ultrastar. The latter is said to have better > > bearings etc, although I don't know the difference for sure. With > > WDs large drives, most of the difference is said to be in the > > firmware (such as TLER in the enterprise/RAID drives). Comparing > > "nearline" and "enterprise" like done here, is merely a comparison > > of small and large drives, where it's well known that the smaller > > (less dense) drives have less errors. > > >=20 > Less dense but also the drives are probably the 10k & 15k RPM drives > which have to be built to better tolerances given the expectation > they'll be spinning for most of their five year life. So what you're saying is that the "enterprise" drives that spin on 7k2 = are just overpriced desktop drives? That really doesn't make sense. In = my vocabolary, "nearline" means "slower", not worse. It'd be really int= eresting to get some opinions from someone that actually knows this, or= perhaps some real-world statistics. Google had a study some years ago,= which at that point showed desktop drives and enterprise drives had ab= out the same error rate. That may be slightly outdated now, but still=E2= =80=A6 Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 98013356 roy@karlsbakk.net http://blogg.karlsbakk.net/ GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt.= Det er et element=C3=A6rt imperativ for alle pedagoger =C3=A5 unng=C3=A5= eksessiv anvendelse av idiomer med xenotyp etymologi. I de fleste tilf= eller eksisterer adekvate og relevante synonymer p=C3=A5 norsk. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html