gpart

About gpart

From Debian's package description

Gpart is a tool which tries to guess the primary partition table of a PC-type disk in case the primary partition table in sector 0 is damaged, incorrect or deleted.

It is also good at finding and listing the types, locations, and sizes of inadvertently-deleted partitions, both primary and logical. It gives you the information you need to manually re-create them (using fdisk, cfdisk, sfdisk, etc.).

The guessed table can also be written to a file or (if you firmly believe the guessed table is entirely correct) directly to a disk device.

Currently supported (guessable) filesystem or partition types:

• BeOS filesystem type.
• BtrFS filesystem type.
• FreeBSD/NetBSD/386BSD disklabel sub-partitioning scheme used on Intel platforms.
• Linux second extended filesystem (Ext2).
• MS-DOS FAT12, FAT16 and FAT32 "filesystems".
• IBM OS/2 High Performance filesystem.
• Linux LVM and LVM2 physical volumes.
• Linux swap partitions (versions 0 and 1).
• The Minix operating system filesystem type.
• MS Windows NT/2000 filesystem.
• QNX 4.x filesystem.
• The Reiser filesystem (version 3.5.X, X > 11).
• Sun Solaris on Intel platforms uses a sub-partitioning scheme on PC hard disks similar to the BSD disklabels.
• Silicon Graphics journaled filesystem for Linux.

Gpart is useful in recovery actions and forensics investigations.

From Debian's description of the gpart package, under that package's license.