From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phil Turmel Subject: Re: RAID5+spare volume gone - mdadm sees RAID1 only? Date: Sun, 22 Sep 2013 17:45:54 -0400 Message-ID: <523F6512.2050007@turmel.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: P Agenbag Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 09/22/2013 02:02 PM, P Agenbag wrote: > Hi List > > I have a D-Link DNS345 NAS which I configured as RAID5 + spare with 4x > 500GB Seagate SATA drives. > > I suspect a power surge caused the NAS to suddenly lose the volume. > > All 4 drives checked out OK when doing a SMART test on the NAS itself. > I proceeded to build all 4 drives into a CentOS server, but was unable > to mount the RAID5 - error is always "not enough drives". > > I followed some advise in archives, and did some mdadm -- examines, > and echo them below - what I don't understand is why the --examine > picks them up as RAID1. > > Is there anything I can do to re-build this array? The "mdadm --examine" info you gave is clearly for the NAS boot volume--it is only 1/2 GB--and would be expected to be raid1. Please take a closer look at your partition tables.... Share them here if you can't get further, and include "mdadm --examine" from all other partitions that have raid superblocks. Phil