From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (ext-mx12.extmail.prod.ext.phx2.redhat.com [10.5.110.17]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id q4UASQv5019429 for ; Wed, 30 May 2012 06:28:26 -0400 Received: from kirsi2.inet.fi (mta-out.inet.fi [195.156.147.13]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q4UASOev011831 for ; Wed, 30 May 2012 06:28:25 -0400 Message-ID: <4FC5F602.6030106@gmail.com> Date: Wed, 30 May 2012 13:27:14 +0300 From: Tero MIME-Version: 1.0 References: <4FC5F21E.1020501@gmail.com> In-Reply-To: <4FC5F21E.1020501@gmail.com> Content-Transfer-Encoding: 7bit Subject: Re: [linux-lvm] /dev/vg1/dir-1: read failed after 0 of 4096 at ... Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii" To: "Ubuntu user technical support, not for general discussions" Cc: linux-lvm@redhat.com On 30.5.2012 13:10, Tero wrote: > Hi, > > I really messed up my LVM settings. I am using Ubuntu 10.04 server and > my updates were up-to-date. Here is the whole story: > > 1. I have got four (4) identical 320 GB hard disks: "/dev/sda", > "/dev/sdb", "/dev/sdc" and "/dev/sdd" and one (1) 1 TB "/dev/sde". > 2. Each 320 GB disk is paritioned to 1 GB + 319 GB ("/dev/sdX1" and > "/dev/sdX2") and 1 TB disk has only one 1 TB parition. > 3. There is RAID-1 (/dev/md0) on the "/dev/sdX1" paritions and RAID-5 > (/dev/md1) on the "/dev/sdX2" partions. > 4. LVM volume group "vg1" was set at first only on /dev/md1. > 5. On vg1 there was only logical volumes: "root", "dir-1" and "dir-2". > 6. Later I attached hard disk /dev/sde and attached it to volume group "vg1" > 7. I created logical volume drbd with command something like "lvcreate > -L 800G -n drbd vg1 /dev/sde1" > 8. I was setting DRBD device on logical volume "drbd". I made some > changes to "filter" parameter in "/etc/lvm/lvm.conf". > 9. I noticed that there "PV unknown device" and I accidentally removed > it with command (I am not 100% sure of this) "vgreduce --removemissing > vg1". If I remember correctly used switch "-f" too. :-( > 10. Then I found out that system was acting strangely. If I remember > correct it prompted something "Couldn't find device with uuid...". Then > I realized how stupid I had been! > 11. Then I followed instructions on > "http://support.citrix.com/article/CTX116095": > 11.1. I booted with installation disk to installation environment > 11.2. I run: "vgdisplay --partial --verbose" > 11.3.Then I run "pvcreate --restorefile /etc/lvm/backup/vg1 --uuid > UUID /dev/sde1 -ff" > 11.4. Then again: "vgdisplay --partial --verbose" > 11.5. At last: "vgcfgrestore --file /etc/lvm/backup/vg1 vg1" > 12. I removed volume group "drbd". > Notice: device /dev/sde was attached all the time. > 13. After this running commands: > > # pvs > /dev/vg1/dir-1: read failed after 0 of 4096 at 299997528064: > Input/output error > /dev/vg1/dir-1: read failed after 0 of 4096 at 299997585408: > Input/output error > /dev/vg1/dir-1: read failed after 0 of 4096 at 0: Input/output error > /dev/vg1/dir-1: read failed after 0 of 4096 at 4096: Input/output error > /dev/vg1/dir-1: read failed after 0 of 4096 at 0: Input/output error > > /dev/vg1/dir-2: read failed after 0 of 4096 at 504658591744: > Input/output error > /dev/vg1/dir-2: read failed after 0 of 4096 at 504658649088: > Input/output error > /dev/vg1/dir-2: read failed after 0 of 4096 at 0: Input/output error > /dev/vg1/dir-2: read failed after 0 of 4096 at 4096: Input/output error > /dev/vg1/dir-2: read failed after 0 of 4096 at 0: Input/output error > > /dev/vg1/root: read failed after 0 of 4096 at 14331871232: Input/output > error > /dev/vg1/root: read failed after 0 of 4096 at 14331928576: Input/output > error > /dev/vg1/root: read failed after 0 of 4096 at 0: Input/output error > /dev/vg1/root: read failed after 0 of 4096 at 4096: Input/output error > /dev/vg1/root: read failed after 0 of 4096 at 0: Input/output error > > PV VG Fmt Attr PSize PFree > /dev/md1 lvm2 -- 891.46g 891.46g > /dev/sde1 vg1 lvm2 a- 931.51g 931.51g > > # lvs > LV VG Attr LSize > dir-1 vg1 vwi-a- 279.39g > dir-2 vg1 vwi-a- 470.00g > root vg1 vwi-a- 13.35g > > Is there any change to recover LVM from this point? I don't care if I > loose the newest data but I really want to salvage at least the older data. > > > Tero > Actually this is much like what happened to me: http://bisqwit.iki.fi/story/howto/undopvremove/ Correction to item 9. where I claimed that I used command "vgreduce". I am pretty sure I used "pvremove" instead as told in the article "How to undo pvremove". Tero