From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Reurich Subject: smartchecks of raid members Date: Tue, 22 Dec 2009 10:00:50 +1300 Message-ID: <1261429250.7944.2249.camel@ezra> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi, Is it safe and can it easily be done to put a raid1 member volume into "write mostly && write behind" mode temporarily while doing a SMART full disk check on that disk? I believe this may help with the smart check as it stops the interruptions caused by reads from the disk, and the writes will be delayed and hopefully committed in larger chunks less often. I also this will allow the server to perform better by not blocking until the writes on the disk being checked return. Is the only risk the delay between a write being completed as far as the process is concerned and the write being committed to the disk being smart checked? Daniel Reurich