Kernel Buffer I/o Error On Device Dm-0
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Lost Page Write Due To I/o Error On Dm-0
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Buffer I/o Error On Dev Dm-0 Logical Block
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Buffer I/o Error On Device Logical Block
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Common F23 Bugs Common F24 Bugs Communicate with Fedora The Documents Bug Reports Fedora Update System (Bodhi) Fedora Build System (Koji) Official Spins FedoraForum.org > Fedora 23/24 > Hardware & Laptops Buffer I/O error on device dm-0 FedoraForum Search User Name Remember Me? Password Forgot Password? Join Us! Register All Albums FAQ Today's Posts Search Hardware & Laptops Help with your hardware, including 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 http://www.linuxquestions.org/questions/linux-software-2/buffer-i-o-error-on-device-dm-0-a-4175512149/ Modes #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. http://forums.fedoraforum.org/showthread.php?t=309039 Anyone have 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
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communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour 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 Ask Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask Ubuntu is a question and answer site for Ubuntu users and developers. 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 Logical Block number in the “Buffer I/O error” up vote 2 down vote favorite I was trying to determine a bad PV which was causing the LV to report Buffer I/O error and found this interesting behaviour in the "Buffer I/O error" message. On a Large LV that is mapped to different PVs, I tried to use the "logical block" reported in the error, to match with the dmsetup table to find out which target device it was on. However this method doesn't seem to be reliable. I used dmsetup to create a device mapper device, with one or a number of holes in it. And the error messages are very interesting and I can't make sense of the pattern. It seems the "Logical Block" number in the error message depends on the size of the hole and also it's position. Is there a definitive way to locate the actual bad block? Here are the tests that I did +++ TEST 1 error block at 8, buffer i/o error at LB 8 root@ubuntu:~# dmsetup create test x.tab root@ubuntu:~# dmsetup table test 0 8 linear 8:16 0 8 1 error 9 1000 linear 8:16 8 root@ubuntu:~# dd if=/dev/mapper/test of=/dev/null bs=512 count=1000 dd: error reading ‘/dev/mapper/test’: Input/output error 8+0 records in 8+0 records out 4096 bytes (4.1 kB) copied, 0.000977434 s, 4.2 MB/s root@ubuntu:~# Sep 5 17:21:07 ubuntu kernel: [ 1358.811671] bio: create slab