From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Stefan G. Weichinger" Subject: Re: Do I understand my RAID6 correctly? Date: Tue, 12 Apr 2011 12:42:26 +0200 Message-ID: <4DA42C92.8010704@xunil.at> References: <4DA40FA4.80605@xunil.at> <4DA41A18.9030602@web.de> Reply-To: lists@xunil.at Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4DA41A18.9030602@web.de> Sender: linux-raid-owner@vger.kernel.org To: "linux-raid@vger.kernel.org" Cc: Yann Ormanns List-Id: linux-raid.ids Am 12.04.2011 11:23, schrieb Yann Ormanns: > You now have 9 devices in this Array (750GB*8 = 6 TB, 6 TB - (2*750GB) = > 4.5 TB). One of them is the failed spare disk. That means, that this > array can "lose" two disks without losing data, as you already wrote. Yep, fine. > Of course you can re-use /dev/sdk as a spare disk, but before, you > should check, why it failed (SMART data for example). I already exported the controller-logs and will look through for SMART info. Unfortunately the controller does not allow the use of smartmontools, I can only use the specific ICP Storage Manager. > You should also have a look at the used drive models. E.g. if this array > uses 9x model XYZ from manucaturer ABC, perhaps more drives will fail in > the next time. uuuh > If the array uses mixed models, it should not be THAT urgent - but that > depends on the importance of the data... > I've read several times of people losing their RAID6, because they did > not mix the hard drive models. Then, a manufacturing fault have very bad > consequences. Scary. Yes, the server uses the same model for all 9 devices. >From your domain I see that you seem to be located in germany, so you might know the manufacturer of the server: transtec. I already opened a support ticket there, we still have a valid support contract. Last time they sent a new drive, we'll see. Thanks, Stefan