Received: from localhost (maia-2.hub.org [200.46.204.187]) by postgresql.org (Postfix) with ESMTP id 3ECEF9FB5BA for ; Fri, 6 Apr 2007 03:00:22 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.187]) (amavisd-maia, port 10024) with ESMTP id 49628-03 for ; Fri, 6 Apr 2007 03:00:17 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.4 Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by postgresql.org (Postfix) with ESMTP id 4D5C09FA182 for ; Fri, 6 Apr 2007 03:00:19 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.6/8.13.6) with ESMTP id l3660F0o028552; Fri, 6 Apr 2007 02:00:15 -0400 (EDT) To: david@lang.hm cc: Ron , Scott Marlowe , pgsql-performance@postgresql.org Subject: Re: SCSI vs SATA In-reply-to: References: <19221.1175751146@sss.pgh.pa.us> <1175786370.9839.31.camel@state.g2switchworks.com> Comments: In-reply-to david@lang.hm message dated "Thu, 05 Apr 2007 13:15:58 -0700" Date: Fri, 06 Apr 2007 02:00:15 -0400 Message-ID: <28551.1175839215@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200704/152 X-Sequence-Number: 24029 david@lang.hm writes: > On Thu, 5 Apr 2007, Ron wrote: >> Yep. Folks should google "bath tub curve of statistical failure" or similar. >> Basically, always burn in your drives for at least 1/2 a day before using >> them in a production or mission critical role. > for this and your first point, please go and look at the google and cmu > studies. unless the vendors did the burn-in before delivering the drives > to the sites that installed them, there was no 'infant mortality' spike on > the drives (both studies commented on this, they expected to find one) It seems hard to believe that the vendors themselves wouldn't burn in the drives for half a day, if that's all it takes to eliminate a large fraction of infant mortality. The savings in return processing and customer goodwill would surely justify the electricity they'd use. regards, tom lane