CLI Magic: Salvage lost partitions with gpart
Messing up your hard disk's partition table doesn't take much effort, especially when you're preparing a dual-boot machine. Even a mistimed fdisk /mbr can spell disaster, erasing the master boot record (MBR) and making the disk unusable. But victims of damaged MBRs rejoice -- gpart can save your day. This utility scans a hard disk and prepares a partition table of areas that resemble a partition, which you can use to make the disk bootable again.
Gpart is short for "guess partitions," and it can do just that with a variety of filesystems, including FAT 16/32, NTFS, EXT2/3, Linux Swap, ReiserFS, *BSD Disklabels, and several others. To install it, download the source code and compile it with make and make install (as root). Gpart is also included in live distributions such as Knoppix, which makes it more accessible.
To let gpart take a look at your disk, run it (as root) without any switches:
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