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.