From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Robinson Subject: Re: Have the velociraptors in a test system now, checkout the errors. Date: Sat, 06 Dec 2008 16:55:41 +0000 Message-ID: <493AAE8D.8070607@yuiop.co.uk> References: <493A5E62.1020508@msgid.tls.msk.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Justin Piszcz Cc: Linux RAID List-Id: linux-raid.ids On 06/12/2008 12:11, Justin Piszcz wrote: > As far the PSU, just btw/FYI, Velociraptors consume ~4-5 watts a piece, These are the 2.5" drives, yes? Even then, I think that's very unlikely; they don't even claim any better than 6W operating, I think 8-10W is more likely. Even if they are running as low as 5-6W, they're so much smaller than 3.5" drives that heat could still cause problems. Can you check what temps the drives have reached, using smartctl? > my entire system used ~100-120watts with all 12 velociraptors on a 650 > watt PSU (now moved into a test system). Do you have your dozen drives on a staggered start or all at power-on? I could see 12 drives starting at once causing damage to almost any 650W PSU unless it's designed specifically for hard drive enclosures, due to the relatively enormous current draw at startup - called inrush current. Cheers, John. -- John Robinson, yuiop IT services 0131 557 9577 / 07771 784 058 46/12 Broughton Road, Edinburgh EH7 4EE