While writing an ordinary file or creating a directory entry, there was no free space left on the device. The disk, tape, or diskette is full of data. Any data written to that device during this condition can be lost.
Remove unneeded files from the hard disk or diskette until there is space for all the data you are writing. You also might move some directories onto another file system and create symbolic links accordingly. When a tape is full, continue on another one, use a higher-density setting, or obtain a higher-capacity tape.
The symbolic name for this error is ENOSPC, errno=28.