From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Brown Subject: Re: make filesystem failed while the capacity of raid5 is big than 16TB Date: Thu, 13 Sep 2012 09:06:52 +0200 Message-ID: <5051860C.9060902@hesbynett.no> References: <505033fe.8aec440a.5d52.ffffe37b@mx.google.com> <50504094.2040302@hesbynett.no> <505059DD.8000108@hesbynett.no> <50509881.60607@hardwarefreak.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <50509881.60607@hardwarefreak.com> Sender: linux-raid-owner@vger.kernel.org To: stan@hardwarefreak.com Cc: GuoZhong Han , Linux RAID List-Id: linux-raid.ids On 12/09/2012 16:13, Stan Hoeppner wrote: > On 9/12/2012 4:46 AM, David Brown wrote: > >>> The requirement of my application is : >>> 1.There are 16 2T disks in the system, the app must be able >>> to identify these disks. >>> 2.The users can create a raid0,raid10 or raid5 use the >>> disks they designated. >>> 3.Performance for writes of the array will reach at least >>> 100MB per second. >> >> This does not make sense as a set of requirements unless you are making >> a disk tester. 1 and 2 are a list of possible solutions, not a >> description of the application and requirements. > > It makes perfect sense if the OP is designing a storage appliance > product and a management front end for it. Based on the information > given, this seems to be the case. > If he had said "up to 16 disks" of "up to 2TB", and a more general performance description, then I would have agreed. I read the requirements as being /exactly/ 16 2TB disks, which I thought odd. But the OP has replied with more information anyway. mvh., David