currently i have windows xp sp 3 installed on my computer , actually earlier i installed ubuntu 13.10 successfully some days ago, that time i was having windows 7 with ubbuntu. but due to some reson i recently formatted the partition of windows 7 and installed windows xp there. but when i tried to reboot there was no grub menu and i was redirecting to the windows xp. then i tried to reinstall ubuntu via live cd, but i got the above error it neither detected my windows nor the previously installed same version of ubuntu on ext 4. when i clicked on custom something else option there was no partition table, just an option for sda that was my whole hard disk and if i go forword it will erase all my hard disk important data. i can't mess with it. i also tried gparted app but it also does not detected any partition and showing my whole harddisk as an unallocated space. i am giving bootinfor script result here , so please help me please, thanks in advance .


============================= Boot Info Summary: ===============================

=> Windows is installed in the MBR of /dev/sda.

sda1: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows XP
Boot files: /boot.ini /ntldr /NTDETECT.COM

sda2: __________________________________________________ ________________________

File system: Extended Partition
Boot sector type: Unknown
Boot sector info:

sda3: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows Vista/7: NTFS
Boot sector info: According to the info in the boot sector, sda3 starts
at sector 2048. But according to the info from fdisk,
sda3 starts at sector 102987776.
Operating System:
Boot files:

============================ Drive/Partition Info: =============================

Drive: sda __________________________________________________ ___________________

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders, total 156301488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sda1 * 63 77,818,859 77,818,797 7 NTFS / exFAT / HPFS
/dev/sda2 77,819,902 156,301,311 78,481,410 f W95 Extended (LBA)
Empty Partition.
/dev/sda3 102,987,776 144,436,337 41,448,562 7 NTFS / exFAT / HPFS

/dev/sda2 overlaps with /dev/sda3

"blkid" output: __________________________________________________ ______________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/sda1 68EC638AEC63517C ntfs
/dev/sda3 C680FE3C80FE3293 ntfs local Disk
/dev/sr0 iso9660 Ubuntu 13.10 i386

================================ Mount points: =================================

Device Mount_Point Type Options

/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sda1 /media/ubuntu/68EC638AEC63517C fuseblk (rw,nosuid,nodev,allow_other,default_permissions,b lksize=4096)
/dev/sda3 /media/ubuntu/local Disk fuseblk (rw,nosuid,nodev,allow_other,default_permissions,b lksize=4096)
/dev/sr0 /cdrom iso9660 (ro,noatime)


================================ sda1/boot.ini: ================================

--------------------------------------------------------------------------------
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOW S
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Micro soft Windows XP Professional" /noexecute=optin /fastdetect
--------------------------------------------------------------------------------

======================== Unknown MBRs/Boot Sectors/etc: ========================

Unknown BootLoader on sda2

00000000 df 4e 17 08 ab d5 94 bd 63 9e 89 e3 4f 5f bd 9b |.N......c...O_..|
00000010 48 b7 85 4b 88 db 23 5f dc 0f 5b 8c f3 73 60 45 |H..K..#_..[..s`E|
00000020 bc db fa 82 2a c1 16 0b a0 98 46 2f f6 d5 83 54 |....*.....F/...T|
00000030 77 9d c1 97 2c 7f 12 d3 e8 fc 20 46 d0 3e 55 bd |w...,..... F.>U.|
00000040 a0 2e 0e e8 5c be 88 be 3c 71 0f 8a ee 91 89 96 |....\...<q......|
00000050 fe f3 cb 05 dc 99 7b ee 17 71 40 50 a4 1b 57 63 |......{..q@P..Wc|
00000060 98 0c 96 a5 1e 94 89 1c 3d dd c0 3e a5 b9 2d bf |........=..>..-.|
00000070 64 18 be c2 db d5 27 02 64 3c 39 e2 19 74 98 9a |d.....'.d<9..t..|
00000080 f5 14 8f ab 44 42 ef b3 8d 37 b0 ee 45 16 94 9d |....DB...7..E...|
00000090 1f 11 cf ab 48 c5 10 42 ce 18 da 10 21 1b 8e f1 |....H..B....!...|
000000a0 b2 80 11 13 3a eb ae fe 40 31 90 61 91 a6 1f 95 |....:...@1.a....|
000000b0 a7 c3 cf a5 ea 25 64 da 59 d5 b7 64 2d 32 ff 45 |.....%d.Y..d-2.E|
000000c0 1f dd 5f dc a4 56 39 5c 87 08 f5 98 ce a4 d1 ef |.._..V9\........|
000000d0 5c 3b dd 08 bb 81 5b 0f 33 ff 57 9e c3 d8 b1 e8 |\;....[.3.W.....|
000000e0 7b 6a c4 dd b6 4f c7 25 c0 1d 3d e4 cf 9c 3f 62 |{j...O.%..=...?b|
000000f0 d5 9e 76 2f c3 ea 0f 64 22 05 bd 50 5d b3 70 46 |..v/...d"..P].pF|
00000100 eb 14 17 fe a6 cf dd e2 51 72 c8 9b b4 21 62 4b |........Qr...!bK|
00000110 ba 6b a3 7b 44 ae ee 26 32 4c 6b 51 df ac 97 d9 |.k.{D..&2LkQ....|
00000120 8b 06 06 ad 4f 13 ab f7 ad 3a 25 75 11 fc ca fd |....O....:%u....|
00000130 29 0b 56 59 77 86 34 70 f2 b6 fb 50 0e 93 88 6f |).VYw.4p...P...o|
00000140 82 13 0b 46 d0 04 ad 51 d7 0c 52 17 27 61 b3 89 |...F...Q..R.'a..|
00000150 8a 3d 4b d8 75 ae a0 49 cd 14 60 65 ec 72 46 d5 |.=K.u..I..`e.rF.|
00000160 e2 ae fd e2 a8 6e 06 9e a0 73 17 c2 a4 97 b5 ce |.....n...s......|
00000170 67 d0 42 fc 73 3f 71 2b 2e 99 4b 08 20 69 dc 10 |g.B.s?q+..K. i..|
00000180 27 6f 77 b8 e8 ca b2 f3 78 77 2e fb 2f 59 93 bc |'ow.....xw../Y..|
00000190 b2 7f ba 4b 5a 16 82 cd 15 9c 31 dc 68 ed a6 9c |...KZ.....1.h...|
000001a0 b0 de b3 b3 48 71 ae 79 a3 9f 4b a5 6f 88 fa 56 |....Hq.y..K.o..V|
000001b0 0e c4 e7 03 78 64 2a a8 57 0e d3 a8 65 d0 00 00 |....xd*.W...e...|
000001c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
00000200


========= Devices which don't seem to have a corresponding hard drive: =========

sdb

=============================== StdErr Messages: ===============================

No volume groups found