Dual CentOS, Windows 7 boot. Had to delete CentOS partition and no grub menu.

[patfla]

3 partitions (in order): Windows 7, CentOS and shared data partition.

I need to increase the size of the Windows 7 partition (c:\windows\winsxs seems to be something not easily remedied).

GParted didn't work in moving things around (bad sector) so I wiped out its partition (# 2 out of 3) and I was able to increase the size of the Windows 7 partition (I can reinstall CentOS easily and not much work lost).

Except ... no more grub menu (unsurprising). This incantation does allow me to boot into Windows 7.

grub> rootnoverify (hd0,0)
grub> makeactive
grub> chainloader +1
grub> boot

Is there any way of rebuilding the grub menu short of reinstalling CentOS (5.5)?

[MikeTbob]

Try the Supergrub disk
http://www.supergrubdisk.org/
Or, try parted magic, it has Supergrub too.
http://www.supergrubdisk.org/
Since you've deleted CentOS, why not just delete grub altogether and use the Windows boot loader? I think you need the Windows install disc for this though.

[devils casper]

Is there any way of rebuilding the grub menu short of reinstalling CentOS (5.5)?

You can rebuild GRUB Menu now because all of its stage and conf files have been deleted with CentOS. As MikeTbob suggested, re-install Windows 7 boot loader.

I am do not know if SuperGRUB CD supports Windows 7 or not. It's worth to try it first. In case it doesn't work, try this method to fix Windows 7 boot problem.