Re: [gentoo-user] Mysterious silent remount / ro
On Sunday, 17 March 2019 17:15:26 GMT Mick wrote: > On Sunday, 17 March 2019 17:05:58 GMT Grant Taylor wrote: > > On 3/17/19 10:48 AM, Peter Humphrey wrote: > > > My little Atom box has a small rescue system which I boot once a week > > > to back up the main system. The backup script is a simple list of bash > > > commands to mount partitions and tar them to a USB disk. > > > > Please share a copy of the backup script. I've found the problem. I wrote the script many years ago, before cgroups were invented, and more recently my script was unmounting /sys/fs/cgroup/ along with the real partitions. I can't begin to imagine what chaos that would cause, but having squashed the bug I don't see the self-unmounting any more. The script starts with everything but the root filesystem unmounted, then mounts one partition at a time to tar it to a USB disk. The problem was a side-effect of the way I was first unmounting everything (don't ask). Sorry about the noise. It did cause me to look more carefully though. > > > While the backup is running I run another script to clean up after > > > any recent update, which involves removing surplus packages, running > > > eclean etc. > > > > Please share a copy of your cleanup script. > > > > > But! At least once per session I have to remount the root filesystem > > > read- > > > write because something, presumably tar, has caused it to be remounted > > > read- only. > > > > "tar" itself shouldn't alter mounts at all. > > > > It is possible that there could be a mount option that causes the file > > system to be remounted read-only if there is a problem accessing the > > file system. > > > > > Where do I start tracking this down? This behaviour was a factor in > > > my suspecting an SSD failure, but I've replaced that and still get the > > > same remounting. > > > > But such remounting is not likely on a new SSD. > > Yes, it would be unlikely. > > > I'd need to see the scripts to even hazard a guess as to what might be > > happening. > > Also, in your previous thread you mentioned you were about to run memtest to > discard the possibility of a faulty RAM. Did you run it overnight and what > did you get? After fixing my backup script I did run memtest through a few cycles, but it didn't find anything wrong. -- Regards, Peter.
Re: [gentoo-user] Mysterious silent remount / ro
On Sunday, 17 March 2019 17:05:58 GMT Grant Taylor wrote: > On 3/17/19 10:48 AM, Peter Humphrey wrote: > > Hello list, > > Hi, > > > My little Atom box has a small rescue system which I boot once a week > > to back up the main system. The backup script is a simple list of bash > > commands to mount partitions and tar them to a USB disk. > > Please share a copy of the backup script. > > > While the backup is running I run another script to clean up after > > any recent update, which involves removing surplus packages, running > > eclean etc. > > Please share a copy of your cleanup script. > > > But! At least once per session I have to remount the root filesystem read- > > write because something, presumably tar, has caused it to be remounted > > read- only. > > "tar" itself shouldn't alter mounts at all. > > It is possible that there could be a mount option that causes the file > system to be remounted read-only if there is a problem accessing the > file system. > > > Where do I start tracking this down? This behaviour was a factor in > > my suspecting an SSD failure, but I've replaced that and still get the > > same remounting. > > But such remounting is not likely on a new SSD. Yes, it would be unlikely. > I'd need to see the scripts to even hazard a guess as to what might be > happening. Also, in your previous thread you mentioned you were about to run memtest to discard the possibility of a faulty RAM. Did you run it overnight and what did you get? -- Regards, Mick signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Mysterious silent remount / ro
On 3/17/19 10:48 AM, Peter Humphrey wrote: Hello list, Hi, My little Atom box has a small rescue system which I boot once a week to back up the main system. The backup script is a simple list of bash commands to mount partitions and tar them to a USB disk. Please share a copy of the backup script. While the backup is running I run another script to clean up after any recent update, which involves removing surplus packages, running eclean etc. Please share a copy of your cleanup script. But! At least once per session I have to remount the root filesystem read- write because something, presumably tar, has caused it to be remounted read- only. "tar" itself shouldn't alter mounts at all. It is possible that there could be a mount option that causes the file system to be remounted read-only if there is a problem accessing the file system. Where do I start tracking this down? This behaviour was a factor in my suspecting an SSD failure, but I've replaced that and still get the same remounting. But such remounting is not likely on a new SSD. I'd need to see the scripts to even hazard a guess as to what might be happening.
[gentoo-user] Mysterious silent remount / ro
Hello list, My little Atom box has a small rescue system which I boot once a week to back up the main system. The backup script is a simple list of bash commands to mount partitions and tar them to a USB disk. While the backup is running I run another script to clean up after any recent update, which involves removing surplus packages, running eclean etc. But! At least once per session I have to remount the root filesystem read- write because something, presumably tar, has caused it to be remounted read- only. Where do I start tracking this down? This behaviour was a factor in my suspecting an SSD failure, but I've replaced that and still get the same remounting. -- Regards, Peter.
