If resulting from an open call, this indicates there is no device at the specified address. For other calls, this indicates the specified address is out of range or the device can no longer be accessed. A floppy disk containing a mounted file system should not be removed prior to being unmounted. Removal of floppy disks containing mounted file systems is likely to result in file system errors, and system panics. Single track formatting may not be supported by some floppy devices.
Some devices permit configuration for geometries which they are unable to support.
A flexible disk can be opened with no media. However, capacity changes resulting from subsequent media changes will not be recognized. The following table of Series 800 Flexible Disk Media shows the disk geometries supported. The media inserted in the drive is formatted depending on the presence or absence of the HD hole in the flexible disk cartridge. HD media is formatted as a 1.44M diskette and DD media is formatted as a 720K diskette.