My main problem is that i have just acquired an ASUS laptop with WINDOWS 7 and I want to install Ubuntu on it.
I want to have a dual boot to choose between both Operating systems, I read that it's better to first install Windows and then Ubuntu, because Windows installer overwrites Ubuntu's boot loader.
So, i tried to install Ubuntu 12.04 LST from an USB pendrive, but when it check for other OS doen's find the Windows 7 system.
I checked posibled causes and re-installed Windows 7 from the Recovery partition in the HD but i got the same result.
Aparently Ubuntu installer found two partition tables (GPT and MBR) and it doesn't know which one to use.
I used gdisk
to try to solve the problem.
From the fdisk and gdisk outputs below, i know that i have to fix my MBR partition but i don't know how.
ubuntu@ubuntu:~$ sudo fdisk -l
WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sda: 500.1 GB, 500107862016 bytes
256 heads, 63 sectors/track, 60563 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x7834646f
Device Boot Start End Blocks Id System
/dev/sda1 1 4294967295 2147483647+ ee GPT
ubuntu@ubuntu:~$ sudo gdisk -l /dev/sda
GPT fdisk (gdisk) version 0.8.5
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Warning! Secondary partition table overlaps the last partition by
33 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sda: 976773168 sectors, 465.8 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): B1142EF0-26CB-4F15-9C42-AFC122E50E2A
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 976773134
Partitions will be aligned on 2048-sector boundaries
Total free space is 122884062 sectors (58.6 GiB)
Number Start (sector) End (sector) Size Code Name
1 2048 411647 200.0 MiB EF00 EFI system partition
2 411648 673791 128.0 MiB 0C01 Microsoft reserved part
3 673792 391383039 186.3 GiB 0700 Basic data partition
4 391383040 802693119 196.1 GiB 0700 Basic data partition
5 925575168 976773167 24.4 GiB 2700 Basic data partition
Command (? for help): r
Recovery/transformation command (? for help): o
Disk size is 976773168 sectors (465.8 GiB)
MBR disk identifier: 0x7834646F
MBR partitions:
Number Boot Start Sector End Sector Status Code
1 1 4294967295 primary 0xEE