From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brad Campbell Subject: Raid-6 stability gets my vote Date: Sat, 16 Jul 2005 00:44:38 +0400 Message-ID: <42D82036.3060602@wasp.net.au> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: RAID Linux List-Id: linux-raid.ids G'day all, This message is really just for future googles. I have been running a 15 disk raid-6 since 24th feb in production and can completely vouch for it's stability. I have had both simulated and real drive failures and it has handled itself perfectly under all cases. Unclean shutdowns and resyncs have all been perfect. I know it's tagged as stable in any case, but I still get E-mails from people dragging my name from google asking about it, so I place this here for the public record. storage1:/home/brad# mdadm -D /dev/md0 /dev/md0: Version : 00.90.01 Creation Time : Thu Feb 24 14:51:17 2005 Raid Level : raid6 Array Size : 3186525056 (3038.91 GiB 3263.00 GB) Device Size : 245117312 (233.76 GiB 251.00 GB) Raid Devices : 15 Total Devices : 15 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Fri Jul 15 13:27:51 2005 State : clean Active Devices : 15 Working Devices : 15 Failed Devices : 0 Spare Devices : 0 Many thanks to hpa and others responsible for raid-6. I have already had a 2 drive failure and they were so close together even a hot spare would not have had time to rebuild. Also thanks to Neil Brown for a great monitoring and management tool. Mdadm and it's monitoring to E-mail has been invaluable. I'd also like to thank Maxtor for producing drives that actually have useful S.M.A.R.T. data. Wish the other manuf's would follow suit. Brad -- "Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so." -- Douglas Adams