From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= Subject: Re: Fwd: problems attempting to grow raid5 to raid6 - advice sought Date: Sat, 25 Nov 2017 17:23:04 +0200 Message-ID: <20171125152304.GN20756@reaktio.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Paul Chambers Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Fri, Nov 24, 2017 at 06:54:43PM -0800, Paul Chambers wrote: > (all the detailed info is at the end of this email) > > I could use some expert help... > > I started with a RAID-5 array of 5 x 6TB WD RED drives, and 1 x 6TB > Seagate Ironwolf drive. This has been running well for a long time as > a 5-drive array, and was grown to a 6 drive array a few months ago by > the addition of the ironwolf drive. No known issues. > > ### devices in order: 0 1 2 3 4 5 > DRIVES="sdj sdg sdf sdq sdc sdh" > > I purchased 3 x 8TB WD Red drives, and used parted to set them up as > GPT, with a single partition that fills the drive. > > I then added them to the array in the usual fashion: > > ~# mdadm --add /dev/md0 /dev/sdi /dev/sdk /dev/sdl > Hmm.. what was the point of creating the partitions if you added the whole disk to the array anyway? -- Pasi