FMTHARD(8) | Maintenance Commands and Procedures | FMTHARD(8) |
fmthard
—
fmthard |
-d data |
-n volume_name |
-s datafile
[-i ]
/dev/rdsk/c?[t?]d?s2 |
fmthard
command updates the VTOC
(Volume Table of Contents) on hard disks. One or more of the options
-s
datafile,
-d
data, or
-n
volume_name must be used to
request modifications to the disk label. To print disk label contents, see
prtvtoc(8). The
/dev/rdsk/c? [t?]d?s2 file must be the character special
file of the device where the new label is to be installed. On x86 systems,
fdisk(8) must be run on the drive before
fmthard
.
If you are using an x86 system, note that the term
‘partition’ in this page refers to slices
within the x86 fdisk partition on x86 machines. Do not
confuse the partitions created by fmthard
with the
partitions created by fdisk(8).
-d
data-i
-n
volume_name-s
datafilefmthard
reads from standard input. The
datafile format is described below. This option
causes all of the disk partition timestamp fields to be set to zero.
Every VTOC generated by
fmthard
will also have partition 2, by
convention, that corresponds to the whole disk. If the input in
datafile does not specify an entry for partition
2, a default partition 2 entry will be created automatically in
VTOC with the tag V_BACKUP and size
equal to the full size of the disk.
The datafile contains one specification line for each partition, starting with partition 0. Each line is delimited by a new-line character (\n). If the first character of a line is an asterisk (*), the line is treated as a comment. Each line is composed of entries that are position-dependent, separated by white space and having the following format:
partition tag flag starting_sector size_in_sectors
where the entries have the following values:
You can save the output of a
prtvtoc(8) command to a file,
edit the file, and use it as the datafile argument
to the -s
option.
For disks under two terabytes, fmthard
cannot write a VTOC on an unlabeled disk. Use
format(8) for this purpose.
March 30, 2022 | OmniOS |