To resolve a file I/O error, try one or more of the following:
Make sure that the volume (especially volume sys:) is mounted.
If the volume is out of disk space, error messages appear on the Logger Console screen indicating that the volume is almost out of disk space. Check this screen for messages.
Check how much space remains on the sys: volume. If it is low, increase the size by adding free space.
To increase the amount of free space, do one or more of the following:
Delete extraneous files (if you can log in from a workstation).
At the server console prompt, enter set immediate purge of files = on, then retry the action.
If you have an additional disk, increase the size of the volume by creating an additional segment of the volume on the disk.