## Changing System Disks

The system disk is not usually removed while the system is running, especially on multiuser systems. If it is, the chx and chd (if the working data directory was on the system disk) commands should be executed to reset the working directory pointers because the directories may be at different addresses on the new disk, for example:

    chx /d0/cmds
    chd /d0

In general, it is unwise to remove a disk and replace it with another if any paths are open to files resident on the disk. It is dangerous to exchange any disk if any files on it are open in WRITE or UPDATE modes.