Buffer I/o Error On Device Dm-7
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How do I manage Linux print queues? How do I increase the size of my AIX dump device? Links Eclipse Support Site Admin Can I safely ignore I/O errors on dm devices? The root user of a system using may occasionally receive a message similar to the following in the daily logwatch email: --------------------- Kernel Begin ------------------------ WARNING: Kernel Errors Present Buffer kernel buffer i o error on device I/O error on device dm-7, ...: 11 Time(s) EXT3-fs error (device dm-7): e ...: 90 Time(s) lost page write due to I/O error on dm-7 ...: 11 Time(s) Likewise, you may notice similar error messages in the /var/log/messages file: May 16 04:04:52 eclipse kernel: lost page write due to I/O error on dm-20 May 16 04:04:52 eclipse kernel: Buffer I/O error on device dm-20, logical block 0 May 16 04:04:52 eclipse kernel: lost page write due to I/O error on dm-20 May 16 04:04:52 eclipse kernel: Buffer I/O error on device dm-20, logical block 0 May 16 04:04:52 eclipse kernel: lost page write due to I/O error on dm-20 May 16 04:04:52 eclipse kernel: Buffer I/O error on device dm-20, logical block 0 May 16 04:04:52 eclipse kernel: lost page write due to I/O error on dm-20 If the device mapper (dm-n) device(s) mentioned in the messages refer to a snapshot logical volume (LV), these messages can be ignored. By their definition, snapshot LVs are temporal in nature; they are created, destroyed and expire when changes
Bad disk? Date: Wed, 10 Nov 2010 09:39:00 -0500 Yesterday I added a hard drive (to put extra stuff on it) to my ubuntu 10.10 box and created a LVM in it. Then copied some files to it and restarted the machine to
Linux Buffer I O Error On Device
see if it would mount into the right mountpoint. It didn't. So I decided to buffer i o error on device sdb logical block see if it was there (vg in question is export): raub strangepork:~$ sudo vgscan Reading all physical volumes. This may take a while... kernel buffer i/o error on device dm-2 logical block /dev/dm-0: read failed after 0 of 4096 at 429496664064: Input/output error /dev/dm-0: read failed after 0 of 4096 at 429496721408: Input/output error /dev/dm-0: read failed after 0 of 4096 at 0: Input/output error /dev/dm-0: read failed after 0 http://kb.eclipseinc.com/kb/can-i-safely-ignore-io-errors-on-dm-devices/ of 4096 at 4096: Input/output error /dev/dm-0: read failed after 0 of 4096 at 0: Input/output error Found volume group "export" using metadata type lvm2 Found volume group "root" using metadata type lvm2 raub strangepork:~$ Those dm-0 messages do not make me happy. dmesg and vgchange make me think the problem is on the new drive: [ 268.024593] scsi 0:0:0:0: Direct-Access ATA ST3500320NS SN04 PQ: 0 ANSI: 5 [ 268.024900] sd 0:0:0:0: [sdc] 976773168 512-byte logical blocks: https://www.redhat.com/archives/linux-lvm/2010-November/msg00011.html (500 GB/465 GiB) [ 268.024918] sd 0:0:0:0: Attached scsi generic sg2 type 0 [ 268.024996] sd 0:0:0:0: [sdc] Write Protect is off [ 268.025003] sd 0:0:0:0: [sdc] Mode Sense: 00 3a 00 00 [ 268.025046] sd 0:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 268.025377] sdc: sdc1 [ 268.049853] sd 0:0:0:0: [sdc] Attached SCSI disk [ 335.467482] quiet_error: 3 callbacks suppressed [ 335.467492] Buffer I/O error on device dm-0, logical block 104857584 [ 335.467540] Buffer I/O error on device dm-0, logical block 104857584 [ 335.467589] Buffer I/O error on device dm-0, logical block 104857598 [ 335.467615] Buffer I/O error on device dm-0, logical block 104857598 [ 335.467647] Buffer I/O error on device dm-0, logical block 0 [ 335.467671] Buffer I/O error on device dm-0, logical block 0 [ 335.467703] Buffer I/O error on device dm-0, logical block 1 [ 335.467734] Buffer I/O error on device dm-0, logical block 104857599 [ 335.467762] Buffer I/O error on device dm-0, logical block 104857599 [ 335.467788] Buffer I/O error on device dm-0, logical block 104857599 raub strangepork:~$ sudo vgchange -a y /dev/dm-0: read failed after 0 of 4096 at 0: Input/output error 1 logical volume(s) in volume group "export" now active 4 logical volume(s) in volume group "root" now active raub strangepork:~$ Glancing through http://readlist.com/lists/centos.org/centos/1/5704.html I wondered if I had the wrong file system de
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow http://unix.stackexchange.com/questions/98208/i-o-errors-on-linux-lvm the company Business Learn more about hiring developers or posting ads with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is a question and answer site for users of http://serverfault.com/questions/556909/kvm-lvm-based-guest-kernel-buffer-i-o-error-on-device-failing-drive Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to error on the top I/O errors on Linux LVM up vote 4 down vote favorite I have a CentOS 6 box with LVM setup and one of the PVs is a USB disk (I know). One of them is getting the error: Oct 30 10:57:07 alpha01 kernel: lost page write due to I/O error on dm-3 Oct 30 10:57:07 alpha01 kernel: Buffer I/O error on device dm-3, logical block 4 Which is causing problems with all error on device of the LVs on it. pvs shows the PV as unknown device. I can ls to the logical volumes and they show up in lvdisplay, but first I get a bunch of IO errors. I made sure the cables are secure between the USB drive. What should I do to get this back up and running for the meanwhile? Should I unmount each LV and run an fsck.ext4 on each one like fsck.ext4 -y /dev/vg1/lv_logvolname ? linux lvm fsck share|improve this question asked Oct 30 '13 at 15:06 Gregg Leventhal 2,29032752 In addition to fsck, if the external drive is SMART capable, checking the drive status/health and running the drive self tests may be useful. Backing up all the data may also be important. –rickhg12hs Oct 30 '13 at 15:44 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted I usually don't go the route of running an fsck and assume the disk is failing or has bad sectors. I definitely wouldn't run the fsck using the -y, since this will give fsck to attempt to start moving blocks which may exacerbate the problem. Instead I'll run a tool such as Spinrite (Commercial) or HDAT2 (freeware) on the disk to do the analysis & potential repair. What else? See my other answers to
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top KVM LVM-based guest… kernel: Buffer I/O error on device. Failing drive? up vote 0 down vote favorite Currently setting up a small KVM host to run a few VMs for a small business. The server has 2 drives in software md RAID 1, then I have it set as a PV in an LVM setup. Guests and hosts are all CentOS 6.4 64bit. The / partition of the KVM guests are disk images but with one particular guest that will have higher i/o requirements, I've added a 2nd HDD to the VM which is a logical volume from the host storage pool. I was running some pretty intense i/o on this LV this evening within the guest, extracting a 60GB multi-volume 7z archive of data. 7z barfed about 1/5th of the way through with E_FAIL. I tried to move some files around on this LV disk and was greeted with "cannot move ... read-only file system". All devices are mounted rw. I looked in /var/log/messages and saw the following errors... Nov 22 21:47:52 mail kernel: Buffer I/O error on device vdb1, logical block 47307631 Nov 22 21:47:52 mail kernel: lost page write due to I/O error on vdb1 Nov 22 21:47:52 mail kernel: Buffer I/O error on device vdb1, logical block 47307632 Nov 22 21:47:52 mail kernel: lost page write due to I/O error on vdb1 Nov 22 21:47:52 mail kernel: Buffer I/O error on device vdb1, logical block 473