Lost a valid swap partition

The course home experiment. Initially, it was in the MBR three primary partitions and one extended partition. Primary partitions swap Ubuntu file system Ubuntu file system win xp. Advanced consisted of 4 NTFS partitions. Next extended partition has been removed, to check how to deal with the restoration of TestDisk. The result from the ties of the extended partition it was the first section and was restored as a primary partition. But MBR has four primary sections, including the extended partition as a kind of a primary partition. The swap partition was marked as free space, stopped working GRUB (only ">grub rescue", the restoration of the LiveCD +chroot +update-grub c note on the impossibility to locate the device). GRUB, however, сисетму loaded but "update-grub" in the terminal processed sections 20 minutes, "GParted" long trying to find topics, but I saw the free space on the entire physical hard disk, the "file Manager" and "disk utility" all sections sees fine, but cannot delete.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: testdisk 6.13-1
ProcVersionSignature: Ubuntu 3.5.0-40.62~precise1-generic 3.5.7.20
Uname: Linux 3.5.0-40-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
Date: Thu Sep 26 10:46:03 2013
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
MarkForUpload: True
SourcePackage: testdisk
UpgradeStatus: No upgrade log present (probably fresh install)