The root file system on my dedicated boxes keep switching to read-only mode.
Maybe 6 times this happened in the last month or so. I didn't have this happen
before at all, so I have a few quesitons...
1. Is this normal for this to happen?
2. Is there a way to fix this w/ out rebooting the box and having the datacenter
3. What would cause this? is this bad disks? Bad os? bad application?
4. Just for monitoring sake, what would be the best way to detect it? try to make a file
and check for failure?
The boxes are dual core centos x64 with sata drives and an ext3 file system.
They are under a bit of load, but, I've been loading boxes for years with out this
sort of problem.
Could be a dead/dying disk. I'd have your datacenter test the disks/RAID array (if you have one) and swap out the disks if found bad (be sure to have current backups though, or get your datacenter to mount the old drive as slave so you can retrieve your data off it).
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i belive this tyhpe of issue has been reported here before and it usually ends that the disk was failing, so that should be your first and immediate port of call, start backing up important data now just in case, could just be filesystem corruption, or a physical error, but either way a filesystem shouldnt magically switch to read only like that.
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