This is an annoying problem on a lot of Linux distributions, and it can have several causes.
If you delete files from the filesystem, the command "df -h" might not show the deleted space as being available.
Can anyone offer suggestions on what might be going on here?
The server appears to be working without issue, but I want to make sure there's not a problem with the partition table, file systems or something else which might result in implosion (or explosion) later. I can't create files as a normal user so it does appear that it's the 5 percent buffer that's preventing catastrophe.
For 12.04 machines running the Trusty HWE kernel 3.13.0-55-generic #94~precise1-Ubuntu SMP, and Trusty machines themselves, the issue appears resolved..
I wonder if it still affects machines on 3.2.0-86 *if* they had previously upgraded to the regression kernel last week?
debug': Function not implemented Filesystem 1K-blocks Used Available Use% Mounted on /dev/vda1 7481832 4263012 2838764 61% / udev 371920 4 371916 1% /dev This is confirmed in an amd64 VM and on an amd64 system. This bug may be due to one of these commits: 7b0f287 kdb: fix incorrect counts in KDB summary command output df438af debugfs: leave freeing a symlink body until inode eviction I'll build a test kernel with these two commits reverted before starting the bisect process. Can you test each of these kernels and see which one resolves the bug?
Also keep in mind that there will, by default, be a 5% block reservation for the super-user per blockdevice (in short: for every seperate partition on a hard disk in your system). On Linux deleted yet open files are known to lsof and marked as (deleted) in lsof's output.You can check this with 5% (by default) of the filesystem is reserved for cases where the filesystem fills up to prevent serious problems. Nothing catastrophic is happening because of the 5% buffer -- root is permitted to use that safety buffer and, in your setup, non-root users have no reason to write into that filesystem./usr ) and/or increase the On of the most common causes of disappearing disk space is a back up saved to the wrong location.Improperly designating the back up location is a frequent cause.It can also be the result of a file saved to a mount point on which no device, such as a back up drive, is mounted.