FD(4S) — DEVICES AND NETWORK INTERFACES
NAME
fd − Disk driver for Floppy Disk Controllers
CONFIG — Sun386i SYSTEMS
controller fdc0 at atmem ? csr 0x1000 dmachan 2 irq 6 priority 2
disk fd0 at fdc0 drive 0 flags 0
CONFIG — SUN-3x SYSTEMS
controller fdc0 at obio ? csr 0x6e000000 priority 6 vector fdintr 0x5c
This synopsis should be used to generate a kernel for a Sun-3/80 system only.
AVAILABILITY
Sun386i and Sun-3/80 systems only.
DESCRIPTION
The block-files access the disk using the system’s normal buffering mechanism and may be read and written without regard to physical disk records. There is also a ‘raw’ interface that provides for direct transmission between the disk and the user’s read or write buffer. A single read or write call usually results in one I/O operation; therefore raw I/O is considerably more efficient when many words are transmitted. The names of the raw files conventionally begin with an extra ‘r.’
Disk Support
The fd0 partition on a floppy disk is normally used for the file system.
FILES
1.44 MB Floppy Disk Drives:
/dev/fd0a block file
/dev/fd0c block file /dev/rfd0a raw file /dev/rfd0c raw file
720 K Floppy Disk Drives:
/dev/fdl0a block file
/dev/fdl0c block file
/dev/rfdl0a raw file
/dev/rfdl0c raw file
SEE ALSO
DIAGNOSTICS
fd drv %d, trk %d: %s
A command such as read or write encountered a format-related error condition. The value of %s is derived from the error number given by the controller, indicating the nature of the error. The track number is relative to the beginning of the partition involved.
fd drv %d, blk %d: %s
A command such as read or write encountered an error condition related to I/O. The value of %s is derived from the error number returned by the controller and indicates the nature of the error. The block number is relative to the start of the partition involved.
fd controller: %s
An error occurred in the controller. The value of %s is derived from the status returned by the controller and specifies the error encountered.
fd(%d):%s please insert
I/O was attempted while the floppy drive door was not latched. The value of %s indicates which disk was expected to be in the drive.
Sun Release 4.0 — Last change: 25 March 1989