Hi, all:

It seems VirtualBox become harder (not as user-friendly as before). I failed to boot up my Windows 7 Guest from Ubuntu 13.10 Host.
Environment:
Host: Ubuntu 13.10 + VirtualBox 4.3.6 r91406 on /dev/sda (2T SATA)
Guest: Windows 7 (64 bit) + SP1 on /dev/sdb: 256Giga SSD
However, on /dev/sda, there are multiple partitions as follows:

jiapei@jiapei-pc:~/.VirtualBox$ sudo fdisk -ls

Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x32934804

Device Boot Start End Blocks Id System
/dev/sda1 2048 586717183 293357568 83 Linux
/dev/sda2 586717184 617967615 15625216 82 Linux swap / Solaris
/dev/sda3 * 617967616 618172415 102400 7 HPFS/NTFS/exFAT
/dev/sda4 618172416 3907026943 1644427264 f W95 Ext'd (LBA)
/dev/sda5 618174464 2268624895 825225216 7 HPFS/NTFS/exFAT
/dev/sda6 2268628992 3907026943 819198976 7 HPFS/NTFS/exFAT

Disk /dev/sdb: 240.1 GB, 240057409536 bytes
255 heads, 63 sectors/track, 29185 cylinders, total 468862128 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: 0xbada2531

Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 468858879 234428416 7 HPFS/NTFS/exFAT

Disk /dev/mapper/cryptswap1: 16.0 GB, 16000221184 bytes
255 heads, 63 sectors/track, 1945 cylinders, total 31250432 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x47005c91

Disk /dev/mapper/cryptswap1 doesn't contain a valid partition table

I really have no idea why both /dev/sdb1 and /dev/sda3 are bootable? And, on GRUB, it shows:
Windows is booted from /dev/sda3, which is out of my mind (Sorry, the OS was not installed by myself, and I really don't want to install both systems again. )

I've already strictly followed the manual here http://www.theunixtips.com/virtualbo...ws-under-linux, for both /dev/sdb1 and /dev/sda3. Neither worked...

How I wish I can use VirtualBox as easy as before, when I was still able to select something like "boot from hard drive(disk)".

Please, can anybody give me some hints?

Thank you very much....


Best Regards
Pei