UNRM(1)

NAME
unrm - disk data recovery

SYNOPSIS
unrm [-abv] device [start-stop ...]

DESCRIPTION
unrm opens the named device and copies data blocks. By default, unrm copies unallocated data blocks only. Arguments:

-a  Copy all blocks. The output is similar to dd(1).

-b  With file systems that have logical blocks that consist of fragments, don't insert null-byte fragments that would maintain 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.

-v  Turn on verbose mode.

device
    Regular file or special device containing a file system. With UNIX FFS, using a raw disk device gives better efficiency than using a block device. With LINUX ext2fs, unrm does not support access via the raw disk device interface.

start-stop ...
    Examine the specified block number or number range. Either the start 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 currently supports only one file system type, namely, the default file system type of the system it was compiled for.

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