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maxcraft
November 30th, 2010, 09:57 PM
I did upgrade my Ubuntu on 10.10 and had always a Dual-Boot with Win7

After the install of Ubuntu, my grub wouldn't work anymore. I could only boot into Ubuntu, but GRUB didn't even appear. I already tried

sudo update-grubbut this brought only the installs for Ubuntu and GRUB didn't start.
Afterwards I tried to recover my MBR with the help of my Win7 DVD, but this didn't work out too. Now I can't boot neither Ubuntu nor Win7 and have to run from the Live-CD.

I also tried to fix it with

sudo grub
root (hd0,0)
setup (hd0)but setup(hd0) only returned, Error 17: Cannot mount etc.

What can I do? I need my Windows for work and I don't want to reinstall neither Ubuntu nor Win7.

Output of fdisk -l gives:


Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x131d70a2

Device Boot Start End Blocks Id System
/dev/sda1 * 1 1 992+ 42 SFS
Partition 1 does not end on cylinder boundary.
/dev/sda2 1 192 1536000 27 Unknown
Partition 2 does not end on cylinder boundary.
/dev/sda3 192 205 102400 42 SFS
Partition 3 does not end on cylinder boundary.
/dev/sda4 205 19457 154648576 42 SFS

Disk /dev/sdb: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00047141

Device Boot Start End Blocks Id System
/dev/sdb1 1 18693 150145024 83 Linux
/dev/sdb2 18693 19458 6142977 5 Extended
/dev/sdb5 18693 19458 6142976 82 Linux swap / Solaris

zazlox
November 30th, 2010, 10:05 PM
check this :

http://ubuntuforums.org/showthread.php?t=732307

maxcraft
November 30th, 2010, 10:08 PM
Gonna try it. Thx!

oldfred
December 1st, 2010, 12:10 AM
Your windows partitions have changed from basic to sfs. SFS is a windows only partitioning scheme that is compatible with nothing. Windows automatically converts to it if you try to create more than 4 partitions and it is like LVM, a logical volume manager.

Windows says you cannot convert back withour copying all your data and reformating completely.

SFS converting:
http://www.sevenforums.com/tutorials/26829-convert-dynamic-disk-basic-disk.html
You can use a third-party tool, such as Partition Wizard 4.2. to convert a convert a dynamic disk to a basic disk without having to delete or format them.
The Partition Wizard software for Windows is supposed to be able to convert dynamic disks to regular partitions without data loss, so it may be what you need to get around this problem; however, I've never used it and so I can't be sure it will work.
Dynamic volume is a Microsoft proprietary format developed together with Veritas (now acquired by Symantec)