NAME
fd —
Sun 3/80 i82027 floppy disk drive
controller driver
SYNOPSIS
fdc0 at obio0 (sun3x)
fd* at fdc0
DESCRIPTION
The
fd driver is for the built-in floppy diskette drive run by
the Intel i82027 controller found on the Sun 3/80.
Bits [0-3] of the minor device number of the special files referring to this
device encode the floppy density as follows:
-
-
- 0
- 3.5'' 1.44MB floppy diskettes.
-
-
- 1
- 3.5'' 720KB floppy diskettes.
-
-
- 2
- 3.5'' 360KB floppy diskettes.
-
-
- 3
- 3.5'' 1.2MB/NEC Japanese format floppy diskettes.
The driver supports floppy disk formatting using the interfaces in
<sys/fdio.h>:
FDIOCGETFORMAT
struct fdformat_parms
- Fetch current formatting parameters. This gets the default
parameters for the open device if no parameters have been set during the
session.
FDIOCSETFORMAT
struct fdformat_parms
- Set formatting parameters. The driver saves this state and
it persists while the device is open.
FDIOCFORMAT_TRACK
struct fdformat_cmd
- Format a track on the medium. If this call returns
EINVAL
, the track formatting parameters were out
of range for the medium. If it returns EIO
, there
was a medium error while formatting the track.
FDIOCSETOPTS
int
- Set driver options which persist until the device is
closed. The options should be the logical OR of the desired values below:
FDOPT_NORETRY
- Do not retry operations on failure
FDOPT_SILENT
- Do not print error messages to the console
FDIOCGETOPTS
int
- Fetch drive options.
A typical use of the formatting facilities would be to open the device, call
FDIOCGETFORMAT
to fetch the current format parameters,
perhaps change a parameter or two, display the formatting details to the user,
and then call
FDIOCSETFORMAT
followed by a series of
calls to
FDIOCFORMAT_TRACK
.
SEE ALSO
eject(1),
fdformat(1)
HISTORY
The
fd formatting support appeared in
NetBSD
1.3.
BUGS
Formatting appears to not work reliably on all machines.