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Mounted filesystem / changed to read-only

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linux-howto

http://serverfault.com – This is how / should be mounted mount /dev/md0 on / type ext3 (rw,errors=remount-ro) but in fact, it is mounted read-only because of unknown reason so far for me. cat /proc/mounts /dev/md0 / ext3 ro,relatime,errors=remount-ro,data=ordered 0 0 :/var/log# echo aaa > /tmp/ddd bash: /tmp/ddd: Read-only file system As ext3 has errors=remount-ro flag, the possible reason is that the filesystem has errors. When I checked syslog/messages/dmesg I did not find any related information (no disk failures, filesystem errors etc.). This server does not have any iLo or so. So what do you recommend, (HowTos)