From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: Re: Growing Linear RAID Date: Thu, 10 Dec 2009 12:34:37 +1100 Message-ID: <20091210123437.63cbc24b@notabene.brown> References: <8338BD137FF1B64EB341218BD702985E02C8C03B@BLR-EC-MBX03.wipro.com> <20091209153002.GA5586@cthulhu.home.robinhill.me.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20091209153002.GA5586@cthulhu.home.robinhill.me.uk> Sender: linux-raid-owner@vger.kernel.org To: Robin Hill Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Wed, 9 Dec 2009 15:30:02 +0000 Robin Hill wrote: > On Wed Dec 09, 2009 at 08:31:54PM +0530, senthilkumar.muthukalai@wipro.com wrote: > > > Hi, > > > > I am trying to add a disk to a Linear Raid which was created with 2 > > disks. > > We use linux-2.6.18 and mdadm-2.6.4. > > I guess these support the above mentioned disk addition. > > > Why do you guess this? The manual page should tell you exactly what's > supported, and even mdadm 3.1.1 makes no mention of support for growing > linear RAID: > > Currently supported growth options including changing the active > size of component devices and changing the number of active > devices in RAID levels 1/4/5/6, changing the RAID level between > 1, 5, and 6, changing the chunk size and layout for RAID5 and > RAID5, as well as adding or removing a write-intent bitmap > > Hmm... guess I should update that documentation, shouldn't I ..... Adding a device to a linear is supported since 2.6.18. NeilBrown