From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: Re: Is that normal a removed part in RAID0 still showed as "active sync" Date: Tue, 8 Jan 2008 14:53:54 +1100 Message-ID: <18306.62418.854287.117775@notabene.brown> References: <14670113.post@talk.nabble.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: message from Hxsrmeng on Monday January 7 Sender: linux-raid-owner@vger.kernel.org To: Hxsrmeng Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Monday January 7, hxsrmeng@gmail.com wrote: > > The /dev/md0 is set as RAID0 > "cat /proc/mdstat" shows > md0 : active raid0 sda1[0] sdd1[3] sdc1[2] sdb1[1] > 157307904 blocks 64k chunks > > Then sdd is removed. > > But "cat /proc/mdsta" still shows the same information as above, while two > RAID5 devices show their sdd parts as (F) > md0 : active raid0 sda1[0] sdd1[3] sdc1[2] sdb1[1] > 157307904 blocks 64k chunks > > Is this normal? Yes. raid0 is not real raid. It is not able to cope with disk failures, so it doesn't even try. Devices in a raid0 are never marked failed as doing so would be of no benefit. NeilBrown