From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Waite Subject: Re: Unable to (un)-grow raid6 Date: Sun, 6 Dec 2015 14:13:22 -0700 Message-ID: <9F08EE4D-B926-4F8F-9F9D-F9C7234959B4@alkaline-solutions.com> References: <4E26C335-DEDB-489E-B54E-A285273569A1@alkaline-solutions.com> <465BF0F5-B5C7-4C02-8EB5-552B959B8D29@alkaline-solutions.com> <56649C04.9000601@turmel.org> Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <56649C04.9000601@turmel.org> Sender: linux-raid-owner@vger.kernel.org To: Phil Turmel Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids > On Dec 6, 2015, at 1:35 PM, Phil Turmel wrote: >=20 > On 12/05/2015 10:04 PM, David Waite wrote: >> I=E2=80=99m having difficulty shrinking down a RAID6 array (md2) on = a Sinology NAS. I wish to go from 13 drives to 11, and believe I need t= o go to 12 first to maintain operation and redundancy through the resiz= ing process. >=20 > No, you can go straight to 11 if you've set array-size properly. --g= row > operations maintain redundancy throughout. I thought =E2=80=94grow maintains redundancy for power loss but not dis= k failure. Would I do this by simply marking the other drive I want to remove as f= ailed? I=E2=80=99ll try =E2=80=94array-size again. How is the array-size sugge= stion by mdadm calculated - the drives are not of uniform size. -DW-- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html