fddisk - FDI disk maintenance utility
/sbin/fddisk options special
-f Unless this option is specified, an attempt to format or to install a
file system fails in two cases. The first failure occurs when the dev-
ice has been opened since the media was inserted. The second failure
occurs if the device is currently opened by another process.
Formats the media to the density appropriate for that media.
Copies a hex dump of sector number PSN to stdout.
-i nnn [ccc]
Uses the interleave factor nnn for formatting. If specified, ccc indi-
cates an additional intercylinder interleave.
Copies a packed-C hex dump of the entire disk to stdout.
-s Specifies silent mode. This option blocks informational messages from
appearing on stderr.
Reads the entire media. The command fails if the utility finds a bad
Waits for media to be inserted into the drive if none is present.
Waits for new media to be inserted into the drive if none is present or
if the current media has been opened since it was last inserted.
Reads the disk and reports on the format of the disk.
Specifies an unmounted, raw device pathname. This device must be an
FDI interface (fd).
The fddisk utility, an FDI (integrated Floppy Disk Interface) disk mainte-
nance program, can format a floppy disk, scan a floppy disk for bad blocks,
and read and write selected blocks. It can be used in shell scripts for
checking the status of floppy disks. Such status checks include checking
for or waiting for the presence of media, and checking for or waiting for
the user to change the media.
The fddisk utility has the following restrictions:
+ You must have read/write access to the device.
+ The device must not be mounted.
+ The program can only be used with a 3.5-inch floppy disk in the RX26
+ In some cases, it might not be possible to format a floppy disk at a
higher density than it is already formatted. If this situation
occurs, the floppy disk must be bulk erased before it can be reformat-
ted at a higher density.
1. This example formats a floppy disk in drive zero:
# /sbin/fddisk -fmt /dev/rdisk/floppy0a
2. This example formats a floppy disk in drive zero when the disk has
been read or written since it was inserted into the drive:
# /sbin/fddisk -fmt -f /dev/rdisk/floppy0a
Commands: mount(8), restore(8), uerf(8)