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Anybody can answer The best answers are voted up and rise to the top ext3 root filesystems goes read-only with aborted journal even after repairs up vote 4 down vote favorite 1 Short version: ext3 root filesystem on rackspace (xen) VM detects aborted journal on boot and mounts read-only. I've attempted to repair this from a rescue environment with tune2fs and e2fsck as prescribed in many articles I ext3 fs error deleted inode referenced read, but the error continues to happen. UPDATE: So based on this article I added "barrier=0" to the /etc/fstab entry for this filesystem and it mounted r/w fine at the next boot. I'm lead to believe this is a paravirtualization thing, but would love it if anyone fully understands what is going on here and can explain. Long version: Rackspace VM just upgraded from Ubuntu 11.10 to 12.04.2 dmesg output with the error: [ 14.701446] blkfront: barrier: empty write xvda op failed [ 14.701452] blkfront: xvda: barrier or flush: disabled [ 14.701460] end_request: I/O error, dev xvda, sector 28175816 [ 14.701473] end_request: I/O error, dev xvda, sector 28175816 [ 14.701487] Aborting journal on device xvda1. [ 14.704186] EXT3-fs (xvda1): error: ext3_journal_start_sb: Detected aborted journal [ 14.704199] EXT3-fs (xvda1): error: remounting filesystem read-only [ 14.940734] init: dmesg main process (763) terminated with status 7 [ 18.425994] init: mongodb main process (769) terminated with status 1 [ 21.940032] eth1: no IPv6 routers present [ 23.612044] eth0: no IPv6 routers present [ 27.147759] [UFW BLOCK] IN=eth0 OUT= MAC=40:40:73:00:ea:12:c4:71:fe:f1:e1:3f:08:00 SRC=98.143.36.192 DST=50.56.240.11 LEN=40 TOS=0x00 PREC=0x00 TTL=242 ID=37934 DF PROTO=TCP SPT=30269 DPT=8123 WINDOW=512 RES=0x00 SYN URGP=0 [ 31.025920] [UFW BLOCK] IN=eth0 OUT= MAC=40:40:73:00:ea:12:c4:71:fe:f1:e1:3f:08:00 SRC=116.6.60.9 DST=50.56.240.11 LEN=40 TOS=0x00 PREC=0x00 TTL=101 ID=256

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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 http://serverfault.com/questions/37600/read-only-root-file-system-ext3-error this site About Us Learn more about Stack Overflow the company Business Learn http://www.novell.com/support/kb/doc.php?id=3605538 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 ext3 fs can answer The best answers are voted up and rise to the top Read-only root file system - ext3 error? up vote 4 down vote favorite 2 I have a problem with ext3 filesystem. It's not writable and I can't remount it. # echo 1 > /file -bash: /file: Read-only file system # mount /dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw) # mount -o remount,rw ext3 fs error / mount: block device /dev/VolGroup00/LogVol00 is write-protected, mounting read-only Can I fix it without server restart? linux ext3 filesystems share|improve this question asked Jul 8 '09 at 10:51 Maciej Nowakowski 21112 Anything in the logs about LVM problems? –wazoox Jul 8 '09 at 13:08 Can you post output of cat /proc/mounts? –wzzrd Jul 8 '09 at 13:15 add a comment| 3 Answers 3 active oldest votes up vote 7 down vote If this happened since the machine booted, check dmesg or other system logs for reports of anything terrifying going wrong with the hardware (e.g IO errors reported when accessing the underlying disks) such errors can trigger the kernel to put things into read-only mode until someone (you!) comes along to make a more informed decision. share|improve this answer answered Jul 8 '09 at 12:35 tialaramex 49133 add a comment| up vote 7 down vote It's probably dropped into read-only mode at the LVM level (lvs will lack a 'w' in the second caracter of the Attr column), so you might be able to flick it back with an lvchange --ignorelockingfailure -p w VolGroup00/LogVol00. Alternately, the V

Favorite Rating: Ext3 filesystem goes read-only without the underlying storage reporting errorsThis document (3605538) is provided subject to the disclaimer at the end of this document. Environment SUSE Linux Enterprise Server 10, prior to Support Pack 2SUSE Linux Enterprise Desktop 10, prior to Support Pack 2Novell Open Enterprise Server 2 (OES 2)Ext3 filesystem Situation An ext3 filesystem is remounted read-only by the kernel.No errors are reported from the storage layer underlying the affected filesystem. Resolution Status (Last updated: 2008-07-07)This issue is fixed as of SLE10 SP2. Refer to TID 7000387 - How to update to SLES/SLED 10 SP2 for details on the process of updating to SP2.For systems which cannot be updated to SLE10 SP2 (e.g. systems running Open Enterprise Server 2 GA), this issue is fixed as of kernel version 2.6.16.54-0.2.8 which is available as an on-line update.WorkaroundWhen a kernel update (as discussed above) is not an option, the problem can als be worked around by explicitly disabling barrier support for the affected filesystems, e.g. by specifyingbarrier=0in /etc/fstab's mount options field for the affected filesystems. Additional Information Root causeError handling code in the ext3 filesystem code is not properly handling the case where a device has stopped to accept barrier requests, which can happen with software RAID devices, LVM devices, device-mapper devices and with third party multipathing software like EMC PowerPath.BackgroundFor background on I/O barriers, please refer to TID 3907838 -JBD error message "barrier-based sync failed".Related issuesPre-service pack 1 installations can be affected by an issue with similar symptoms. That issue is covered in TID 3735930 - Filesystem goes read-only without the underlying storage reporting errors.VMware guest installations can also be affected by an issue with similar symptoms. That issue is covered in TID 7005154 - Filesystem goes read-only in VMware. DisclaimerThis Support Knowledgebase provides a valuable tool for NetIQ/Novell/SUSE

 

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