From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263540AbTDCU72 (for ); Thu, 3 Apr 2003 15:59:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263556AbTDCU71 (for ); Thu, 3 Apr 2003 15:59:27 -0500 Received: from amsfep16-int.chello.nl ([213.46.243.26]:8741 "EHLO amsfep16-int.chello.nl") by vger.kernel.org with ESMTP id S263540AbTDCU7K (for ); Thu, 3 Apr 2003 15:59:10 -0500 Message-ID: <004901c2fa25$795b5d80$2e77c23e@pentium4> From: "Jonathan Vardy" To: "Andy Arvai" , Cc: References: <200304031949.LAA28555@astra.scripps.edu> Subject: Re: RAID 5 performance problems Date: Thu, 3 Apr 2003 23:10:37 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org you're right, it should be. When I was writing the original mail I had it running in degraded mode so I edited the values that /proc/mdstat gave me to match the array in normal mode. I forgot to make [_UUUU] [UUUUU]. I'm currently rebuilding the array but it's taking some time... md0 : active raid5 hdc1[5] hdk1[4] hdi1[3] hdg1[2] hde1[1] 468872704 blocks level 5, 128k chunk, algorithm 0 [5/4] [_UUUU] [================>....] recovery = 83.1% (97429504/117218176) finish=65.5min speed=5034K/sec ----- Original Message ----- From: "Andy Arvai" To: Cc: Sent: Thursday, April 03, 2003 9:49 PM Subject: Re: RAID 5 performance problems > > Shouldn't /proc/mdstat have [UUUUU] instead of [_UUUU]? Perhaps > this is running in degraded mode. Also, you have 'algorithm 0', > whereas my raid5 has 'algorithm 2', which is the left-symmetric > parity algorithm. > > Andy > > > cat /proc/mdstat gives: > > > > Personalities : [raid0] [raid5] > > read_ahead 1024 sectors > > md0 : active raid5 hdk1[4] hdi1[3] hdg1[2] hde1[1] hdc1[0] > > 468872704 blocks level 5, 128k chunk, algorithm 0 [5/5] [_UUUU] > > unused devices: > > > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >