Help! I can't boot my Windows partition any more!

[Ottavio Caruso <ottavio2006-netbsd%yahoo.com@localhost>]

Hello,

I used to dual boot Windows 7 and NetBSD.

This is my fdisk:


Disk: /dev/rwd0d
NetBSD disklabel disk geometry:
cylinders: 155061, heads: 16, sectors/track: 63 (1008 sectors/cylinder)
total sectors: 156301488, bytes/sector: 512

BIOS disk geometry:
cylinders: 1023, heads: 240, sectors/track: 63 (15120 sectors/cylinder)
total sectors: 156301488

Partitions aligned to 2048 sector boundaries, offset 2048

Partition table:
0: NTFS, OS/2 HPFS, QNX2 or Advanced UNIX (sysid 7)
    start 2048, size 204800 (100 MB, Cyls 0-13/163/19)
1: NTFS, OS/2 HPFS, QNX2 or Advanced UNIX (sysid 7)
    start 206848, size 63375360 (30945 MB, Cyls 13/163/20-4205/41/25)
2: NetBSD (sysid 169)
    start 63582208, size 46360576 (22637 MB, Cyls 4205/41/26-7271/83/35), Active
3: Primary DOS with 32 bit FAT (sysid 11)
    start 109942784, size 46358528 (22636 MB, Cyls 7271/83/36-10337/93/13)
First active partition: 2
Drive serial number: 4067601000 (0xf272aa68)


and this is my disklabel:

-- bash-4.3$ sudo disklabel wd0
# /dev/rwd0d:
type: unknown
disk: HITACHI HTS5425
label:
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 155061
total sectors: 156301488
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0

16 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a:  17687376  63582208     4.2BSD   2048 16384     0  # (Cyl.  63077*-  80624*)
 b:    204800      2048       NTFS                     # (Cyl.      2*-    205*)
 c:  46360576  63582208     unused      0     0        # (Cyl.  63077*- 109070*)
 d: 156301488         0     unused      0     0        # (Cyl.      0 - 155060)
 e:  28673200  81269584     4.2BSD   2048 16384     0  # (Cyl.  80624*- 109070*)
 f:  63375360    206848       NTFS                     # (Cyl.    205*-  63077*)
 g:  46358528 109942784      MSDOS                     # (Cyl. 109070*- 155060*)


I marked my NetBSD partition active with SystemRescueCD, leaving me
the only option to boot Windows from a usb drive with syslinux.

Now the usb drive is unbootable, therefore I can only access NetBSD.

How can I boot from Windows without recurring to an external computer?

--
Ottavio