Buffer I/o Error On Device Dm-12
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Buffer I O Error On Device Sr0
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Kernel Buffer I O Error On Device
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 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 linux buffer i o error on device 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 written to them exceed their predefined capacity. To determine if the dm device points to a snapshot LV: First, locate the "dm" device number in the logs (in our example, 20): [root@eclipse ~]# grep "I/O error" /var/log/messages May 16 04:04:52 eclipse kernel: Buffer I/O error on device dm-20, logical block 1545 May 16 04:04:52 eclipse kernel: lost page write due to I/O error on dm-20 Next, list the
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Buffer I O Error On Device Sda
Laptops Buffer I/O error on device dm-0 FedoraForum Search User Name Remember Me? kernel buffer i/o error on device dm-2 logical block Password Forgot Password? Join Us! Register All Albums FAQ Today's Posts Search Hardware & Laptops Help with your hardware, including buffer i/o error on device dm-3 laptop issues Google™ Search FedoraForum Search Red Hat Bugzilla Search Search Forums Show Threads Show Posts Tag Search Advanced Search Go to Page... Thread Tools Search this Thread Display Modes http://kb.eclipseinc.com/kb/can-i-safely-ignore-io-errors-on-dm-devices/ #1 1st March 2016, 06:03 PM pmeni Offline Registered User Join Date: Mar 2016 Location: AR Posts: 2 Buffer I/O error on device dm-0 Hi, I have problems with Fedora 23, (Fedora 22 works fine, doesn't have this kind of errors), with no reason the disk fail an run into read-only. I changed the disk to a new one and the same issue. Anyone have http://forums.fedoraforum.org/showthread.php?t=309039 this errors?, May be I can try to install Fedora whit no LVM and see if this solve the problem. Tested with this kernel versions: kernel.x86_64 4.3.5-300.fc23 kernel.x86_64 4.4.2-301.fc23 Full log: http://ur1.ca/ol96o Mar 01 12:51:48 NORC kernel: ata6.00: exception Emask 0x0 SAct 0x400 SErr 0x0 action 0x6 frozen Mar 01 12:52:48 NORC kernel: ata6.00: failed command: WRITE FPDMA QUEUED Mar 01 12:52:48 NORC kernel: ata6.00: cmd 61/50:50:08:6c:1b/00:00:06:00:00/40 tag 10 ncq 40960 out res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) Mar 01 12:52:48 NORC kernel: ata6.00: status: { DRDY } Mar 01 12:52:48 NORC kernel: ata6: hard resetting link Mar 01 12:52:48 NORC kernel: ata6: link is slow to respond, please be patient (ready=0) Mar 01 12:52:48 NORC kernel: ata6: COMRESET failed (errno=-16) Mar 01 12:52:48 NORC kernel: EXT4-fs warning (device dm-0): ext4_end_bio:329: I/O error -5 writing to inode 2368435 (offset 0 size 0 starting block 4954560) Mar 01 12:52:48 NORC kernel: Buffer I/O error on device dm-0, logical block 4954560 Mar 01 12:52:48 NORC kernel: EXT4-fs warning (device dm-0): ext4_end_bio:329: I/O error -5 writing to inode 2368435 (offset 0 size 0 starting block 4954561) Mar 01 12:52:48 NORC kernel: Buffer I/O error on device dm-0, logical block 4954561 Mar 01 12:52:48 NORC kerne
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 https://www.redhat.com/archives/linux-lvm/2010-November/msg00011.html to see if it would mount into the right mountpoint. It didn't. So I http://unix.stackexchange.com/questions/98208/i-o-errors-on-linux-lvm decided to see if it was there (vg in question is export): raub strangepork:~$ sudo vgscan Reading all physical volumes. This may take a while... /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 error on failed after 0 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: error on device [sdc] 976773168 512-byte logical blocks: (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:/
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 Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is a question and answer site for users of 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 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 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 these questions for additional meth