wipefs — wipe a signature from a device
wipefs
[−ahnptV
] [ −o
offset ] device
wipefs can
erase filesystem, raid or partition table signatures (magic
strings) from the specified device
to make the signature
invisible for libblkid.
wipefs does
not erase the filesystem itself nor any other data from the
device. When used without options −a
or −o
, it lists all visible
filesystems and the offsets of their basic signatures.
Note that some filesystems or some partition tables store more magic strings on the devices. The wipefs lists the first offset where a magic string has been detected. The device is not scanned for additional magic strings for the same filesystem. It's possible that after wipefs -o <offset> will be the same filesystem or partition table visible by another magic string on another offset.
When used with option −a
then all for libblkid visible magic strings are erased.
−a,
−−all
Erase all available signatures. This set of erased
signatures could be restricted by −t <list>
option.
−h,
−−help
Print help and exit.
−n,
−−no−act
Causes everything to be done except for the write() call.
−o,
−−offset
offset
Specify the location (in bytes) of the signature
which should be erased from the device. The offset
number may include
a "0x" prefix; then the number will be interpreted as a
hex value. It is possible to specify multiple
−o
options.
The offset
argument may be followed by binary (2^N) suffixes KiB,
MiB, GiB, TiB, PiB and EiB (the "iB" is optional, e.g.
"K" has the same meaning as "KiB") or decimal (10^N)
suffixes KB, MB, GB, PB and EB.
−p,
−−parsable
Print out in parsable instead of printable format. Encode all potentially unsafe characters of a string to the corresponding hex value prefixed by '\x'.
−t,
−−types
listUsed to limit the set of printed or erased signatures. More than one type may be specified in a comma-separated list. The list of types or individual types can be prefixed with 'no' to specify the types on which no action should be taken. For more details see mount(8).
−V,
−−version
Output version information and exit.