Buffer I/o Error On Device Dm
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Buffer I/o Error On Device Dm-0 Logical Block
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Kernel Buffer I O Error On Device
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Linux Buffer I O Error On Device
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 #1 1st March 2016, http://www.linuxquestions.org/questions/linux-software-2/buffer-i-o-error-on-device-dm-0-a-4175512149/ 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 this errors?, May be I can try to http://forums.fedoraforum.org/showthread.php?t=309039 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 kernel: Buffer I/O error on device dm-0, logical block 4954562 Mar 01 12:52:48 NORC kernel: Bu
on megaraid rebuild, analysis and Issues related to hardware problems Post Reply Print view Search Advanced search 13 posts 1 2 Next jamesNJ Posts: 18 Joined: 2015/02/25 21:49:44 CentOS server freeze/crash on megaraid http://www.centos.org/forums/viewtopic.php?t=53481 rebuild, analysis and Quote Postby jamesNJ » 2015/07/24 17:25:21 Hello all,I have a problem http://unix.stackexchange.com/questions/98208/i-o-errors-on-linux-lvm with a large CentOS 7 server hosting an LSI MegaRAID controller with 16x 1tb SAS drives. The server goes dead at night requiring a forced reboot or power cycle to restore service. If it matters, this server has 1 large RAID-6 volume with 1 global hot spare available.I believe I have narrowed this issue down error on to the MegaRAID controller being busy with a RAID rebuild, and some automated action occurring at night that confuses LVM into oblivion. The issue is difficult to narrow down because this “automated action” seems to result in all file systems being marked read-only. Syslog seems to continue working, but obviously cannot write useful data out to disk. Hence I have only been able to collect data on those rare times error on device that I can actually log in when this issue occurs. I was able to capture 2 points of data that seem to start out with the same error condition.This only seems to occur when a drive fails and the MegRAID rebuilds to the global hot spare, or if I force some action on the RAID which causes a drive fail and rebuild to an alternate disk (I had a few disks get SMART predictive failures and have been working to replace these with new). I initially thought this issue was related to smartd warning messages, however when I replaced the last drive with predictive failures, the rebuild triggered the same behavior.So what seems to be the pattern is that I kick off a rebuild (which takes many hours) and then sometime around midnight a systemd-udevd process kicks in and the system eventually ends up unresponsive. From the 2 times I was able to get on, these messages seem to be in common right at the time file systems go read-only:Jul 15 00:45:44 server1 kernel: megaraid_sas: scanning for scsi0...Jul 15 00:45:44 server1 systemd-udevd: failed to execute '/sbin/mdadm' '/sbin/mdadm -If sda5 --path pci-0000:09:00.0-scsi-0:2:0:0': Input/output errorJul 15 00:45:44 server1 systemd-udevd: failed to execute '/sbin/mdadm' '/sbin/mdadm -If sda4 --path pci-0000:09:00.0-sc
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