From mboxrd@z Thu Jan 1 00:00:00 1970 From: "NeilBrown" Subject: Re: RAID-5 creation crashes when files system installed while recovery going on Date: Wed, 24 Jun 2009 12:31:07 +1000 (EST) Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Tirumala Reddy Marri Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Wed, June 24, 2009 8:35 am, Tirumala Reddy Marri wrote: > All, > I started RAID-5 creation using mdadm command. While recovery is > happening I tried to install file system . I see intermittent crash . > And crash doesn't happen at fixed location. Any clue what could be the > problem? How does the read/writes to MD driver handled while RAID-5 is > under building. Can you describe exactly what you mean by "crash" ?? The raid5 driver normally has no problems handling writes while it is resyncing. It has a 'stripe_cache' which is used to synchronise regular IO with resync IO. NeilBrown