VNDCONFIG(8) | System Manager's Manual | VNDCONFIG(8) |
vndconfig
—
vndconfig |
[-cirvz ] [-f
disktab] [-t
typename] vnode_disk
regular_file [geomspec] |
vndconfig |
-u [-Fv ]
vnode_disk |
vndconfig |
-l [-m
min] [vnode_disk ...] |
vndconfig
command configures vnode pseudo disk
devices. It will associate the vnode disk vnode_disk
with the regular file regular_file allowing the latter
to be accessed as though it were a disk. Hence a regular file within the
filesystem can be used for swapping or can contain a filesystem that is
mounted in the name space. The vnode_disk is a special
file of raw partition or name of vnode disk like vnd0.
Options indicate an action to be performed:
-c
If geomspec is specified, the vnode device will emulate the specified disk geometry. The format of the geomspec argument is:
/
nsectors/
ntracks/
ncylindersIf geometry is not specified, the kernel will choose a default based on 1MB cylinders. secsize is the number of bytes per sector. It must be a power of two, and at least 512. nsectors is the number of sectors per track. ntracks is the number of tracks per cylinder. ncylinders is the number of cylinders in the device.
-F
-u
.-f
disktab-t
option should look up in
disktab instead of in
/etc/disktab.-i
-l
-m
min-l
and if no specific devices are
given, causes at least min devices to be listed. The
default for min is 4, but all vnd devices up to (and
sometimes just beyond) the highest numbered vnd device configured since
the system last booted will be listed. If min is set
to 0, then only vnd devices currently in use will be shown.-r
-t
typename-u
-v
-z
If no action option [-clu
] is given,
-c
is assumed.
vndconfig
will exit with status 0 if the operation
requested completed successfully, or 1 otherwise. Unsuccessful completion can
be caused by unknown or incorrectly used options; attempting to configure a
vnd that is already configured; or unconfigure one that is not, or without
-F
, one which is still in use; or if devices are
specified that do not exist or are not
vnd(4) devices, giving an improper
geometry, etc.
vndconfig vnd0
/tmp/diskimage
vndconfig /dev/rvnd0c
/tmp/diskimage
Configures the vnode disk vnd0. Please note that use of the second form of the command is discouraged because it requires knowledge of the raw partition which varies between architectures. For the first form, be aware that there must not be a file vnd0 in the current directory, or it will be assumed to be the vnd device to be configured (which will usually fail.)
vndconfig vnd0 /tmp/floppy.img
512/18/2/80
Configures the vnode disk vnd0 emulating the geometry of 512 bytes per sector, 18 sectors per track, 2 tracks per cylinder, and 80 cylinders total.
vndconfig -t floppy vnd0
/tmp/floppy.img
Configures the vnode disk vnd0 using the geometry specified in the floppy entry in /etc/disktab.
vndconfig -u vnd0
Unconfigures the vnd0 device.
To obtain status on all vnd devices listed in
/dev (assuming a system where the ‘d’
partition is the whole device (RAW_PART
)), use:
vndconfig -l /dev/vnd*d
Using
vndconfig -m0 -l
/dev/vnd*d
vndconfig -l
-m
) regardless of what might appear in
/dev (or elsewhere.)
vnconfig
command appeared in NetBSD
1.0. It was renamed to vndconfig
in
NetBSD 7.0 for consistency with other similar
commands. (The original name was also retained as an alternative for backwards
compatibility.)
November 6, 2015 | NetBSD 9.4 |