NAME
unrm - disk data recovery
SYNOPSIS
unrm [-bevV] [-f fstype] device [start-stop ...]
DESCRIPTION
unrm opens the named device and copies data blocks. By default, unrm
copies unallocated data blocks only.
Arguments:
-b With file systems that have logical blocks that consist of
fragments, don’t insert null-byte padding to preserve logical
block alignment in the output. This option is a no-op with the
LINUX ext2fs file system, where logical blocks and fragments
have the same size.
-e Copy every block. The output should be similar to dd(1).
-f fstype
Specifies the file system type. The default file system type is
system dependent. With most UNIX systems the default type is ufs
(Berkeley fast file system). With Linux the default type is
ext2fs (second extended file system).
-v Turn on verbose mode, output to stderr.
-V Turn on verbose mode, output to stdout.
device Disk special file, or regular file containing a disk image. On
UNIX systems, raw mode disk access may give better performance
than block mode disk access. LINUX disk device drivers support
only block mode disk access.
start-stop ...
Examine the specified block number or number range. Either the
start, the stop, or the -stop may be omitted. If -b is not
specified, the start block must be aligned to a logical block
boundary (e.g. a multiple of 8 in the case of an FFS file
system). With the LINUX ext2fs file system, the start block
number must be >= 1.
BUGS
unrm should support more file system types. Right now, support is
limited to ext2fs when built on Linux, and ufs when built on Solaris
and BSD systems.
LICENSE
This software is distributed under the IBM Public License.
AUTHOR(S)
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA