From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: mark spare as active sync device? Date: Thu, 16 Jun 2011 10:54:23 +1000 Message-ID: <20110616105423.6aefa0f1@notabene.brown> References: <20110615121026.f689e4b2.taeuber@bbaw.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20110615121026.f689e4b2.taeuber@bbaw.de> Sender: linux-raid-owner@vger.kernel.org To: Lars =?ISO-8859-1?B?VOR1YmVy?= Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Wed, 15 Jun 2011 12:10:26 +0200 Lars T=E4uber wrot= e: > Hi there, >=20 > is it possible to mark a nearly completly synced device as active in = sync? >=20 > There was failing a device shortly before a spare drive was completel= y > synced. I want to get the directory structure from the device. >=20 > md3 : active raid6 sdz[16] sdaf[13] sds[0] sdac[10] sdah[15] sdag[14]= sdae[12] sdad [11](F) sdab[9] sdaa[17](F) sdy[6] sdx[5] sdw[4] sdv[3] = sdu[2] sdt[1] > 27349202944 blocks level 6, 64k chunk, algorithm 2 [16/13] [UUU= UUUU__UU_UUUU] > [=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D>.] = recovery =3D 98.3% (1921986020/1953514496) finish=3D25.9min speed=3D202= 44K/sec >=20 > /dev/sdz was the device that was inserted and is now marked as spare.= Is it possible to mark sdz as active and in sync? Not really.... and should you mark it as the in-sync member number 7, 8= , or 11 ?? >=20 > Is there any chance to get data from this array? Your best bet is to try to 'create' the array again using '--assume-cle= an' and putting the devices that you thing are working in the correct place= =2E e.g. something like: mdadm -S /dev/md3 mdadm -C /dev/md3 --metadata=3D0.90 --level=3D6 --algorithm=3D2 --chun= k=3D64 \ --raid-devices=3D16 --assume-clean \ /dev/sds /dev/sdt /dev/sdu /dev/sdv \ /dev/sdw /dev/sdx /dev/sdy /dev/sdz \ missing /dev/sdab /dev/sdac missing \ /dev/sdae /dev/sdaf /dev/sdag /dev/sdah Then "fsck -n /dev/md3" and see if it looks reasonably OK. If it doesn't, try placing /dev/sdz in place of a different 'missing'. Of course you should double check the order of devices that I have give= n here, and all the other details. NeilBrown -- 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