From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erik =?utf-8?b?SGplbG3DpXM=?= Subject: cannot attach backing device, wipefs does not fix it Date: Wed, 18 Jun 2014 15:38:55 +0000 (UTC) Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from plane.gmane.org ([80.91.229.3]:59782 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751352AbaFRPpF (ORCPT ); Wed, 18 Jun 2014 11:45:05 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1WxI2q-0000P4-0F for linux-bcache@vger.kernel.org; Wed, 18 Jun 2014 17:45:04 +0200 Received: from ws-216.ansatt.hig.no ([128.39.243.216]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 18 Jun 2014 17:45:04 +0200 Received: from erik.hjelmas by ws-216.ansatt.hig.no with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 18 Jun 2014 17:45:04 +0200 Sender: linux-bcache-owner@vger.kernel.org List-Id: linux-bcache@vger.kernel.org To: linux-bcache@vger.kernel.org Hi, ubuntu 14.04, and a 5TB RAID (sdc) partitioned into two 2.5TB partitions (sdc1 and sdc2) with parted to be used as backing devices, /dev/sdc2 attaches fine problem with sdc1: # make-bcache -B /dev/sdc1 Device /dev/sdc1 already has a non-bcache superblock, remove it using wipefs and wipefs -a # wipefs /dev/sdc1 wipefs: WARNING: /dev/sdc1: appears to contain 'dos' partition table # wipefs -a /dev/sdc1 wipefs: WARNING: /dev/sdc1: appears to contain 'dos' partition table # make-bcache -B /dev/sdc1 Device /dev/sdc1 already has a non-bcache superblock, remove it using wipefs and wipefs -a In other words, Im unable to attach sdc1 any help greatly appreciated! /Erik