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My root (/) file system get remounted as read only after the system has been up for some time. This seems to vary from 3 hours to 48 hours. This system is running Ubuntu desktop 14.04. Its primary function is to run several Virtual Machines for myself. Here is the system config.

  • Dell XPS 8700
  • Intel i7 4770 24GB ram
  • 128 GB mSATA SSD (this hold the / file system that has been giving me issues. It also contains swap and other system file systems)
  • 3x 1TB SATA drive (no problem here) But they hold the VM files. This currently only runs 3 VMs.

A similar system (HP) has 32GB ram but same config otherwise does not have this issue. It runs 12 VMs no prob.

After / remounts as read only the VMs die as they write to a temp location on the SSD. I cannot sudo on the machine. And if I try to run the terminal command "mount" terminal just closes. After a reboot, I am asked to fix file system error (at startup) which I do and this works fine until the next incident.

I have backups of the VMs (plus their drives seem to be fine). But I would rather fix this installation than redo it since I have made changes that customize the system to my liking. Greping dmesg for EXT4-fs show this but I think this is just startup. No errors.

[    1.331446] EXT4-fs (sde1): mounted filesystem with ordered data mode. Opts: (null)
[    2.474298] EXT4-fs (sde1): re-mounted. Opts: errors=remount-ro
[    2.584750] EXT4-fs (sda): mounted filesystem with ordered data mode. Opts: (null)
[    2.637858] EXT4-fs (sdc): mounted filesystem with ordered data mode. Opts: (null)
[    2.768738] EXT4-fs (sdd1): mounted filesystem with ordered data mode. Opts: (null)
[    2.850718] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null)

I have run smart test in Disks. But it says everything is ok there. (And the machine is only 3 months old. This issue has been prominent for about 3 weeks now.

I'm open to ideas.

EDIT 1: It crashed last night. So i did some digging. charles@VMH2:/var/log$ cat /var/log/syslog.1 | grep sde1
Jul 18 19:19:40 VMH2 kernel: [ 0.892391] sde: sde1 sde2 < sde5 >
Jul 18 19:19:40 VMH2 kernel: [ 1.331446] EXT4-fs (sde1): mounted filesystem with ordered data mode. Opts: (null)
Jul 18 19:19:40 VMH2 kernel: [ 2.474298] EXT4-fs (sde1): re-mounted. Opts: errors=remount-ro
Jul 19 04:49:13 VMH2 kernel: [27950.072962] INFO: task jbd2/sde1-8:212 blocked for more than 120 seconds.
Jul 19 04:49:13 VMH2 kernel: [27950.072968] jbd2/sde1-8 D ffff88061ecd30c0 0 212 2 0x00000000
Jul 19 11:48:50 VMH2 kernel: [ 0.888753] sde: sde1 sde2 < sde5 >
Jul 19 11:48:50 VMH2 kernel: [ 0.961088] EXT4-fs (sde1): mounted filesystem with ordered data mode. Opts: (null)
Jul 19 11:48:50 VMH2 kernel: [ 1.999033] EXT4-fs (sde1): re-mounted. Opts: errors=remount-ro charles@VMH2:/var/log$ cat /var/log/syslog.1 | grep 27950
Jul 19 04:49:13 VMH2 kernel: [27950.072962] INFO: task jbd2/sde1-8:212 blocked for more than 120 seconds.
Jul 19 04:49:13 VMH2 kernel: [27950.072966] Tainted: P OE 3.16.0-43-generic #58~14.04.1-Ubuntu
Jul 19 04:49:13 VMH2 kernel: [27950.072967] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jul 19 04:49:13 VMH2 kernel: [27950.072968] jbd2/sde1-8 D ffff88061ecd30c0 0 212 2 0x00000000
Jul 19 04:49:13 VMH2 kernel: [27950.072971] ffff8805f8297cb0 0000000000000046 ffff8805f8218a30 ffff8805f8297fd8
Jul 19 04:49:13 VMH2 kernel: [27950.072973] 00000000000130c0 00000000000130c0 ffff8802e8570000 ffff8805f8297d98
Jul 19 04:49:13 VMH2 kernel: [27950.072975] ffff8805f89160b8 ffff8805f8218a30 ffff8805dc2c9e00 ffff8805f8297d80
Jul 19 04:49:13 VMH2 kernel: [27950.072977] Call Trace:

It appears to me that INFO: task jbd2/sde1-8:212 blocked for more than 120 seconds. is the source of my issues. I just don't know what the message means (or anything after it). Does anybody know what's going on here?

  • Did you ever manage to resolve this? I'm having the same problem on a Dell laptop. And I have seen others with Dell laptops having this issue also askubuntu.com/questions/251284/… – warsong Aug 20 '16 at 17:34

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