[CentOS] chroot question - can you help?

Hi 


I install new linux in sda and try to recover the boot partition in sdb

I mount it /dev/sdb1 /bootpartion

but I can't chroot into it and grub-install

Can you help

[root at host ~]# chroot /bootpartion

chroot: cannot run command `/bin/bash': No such file or directory

Send instant messages to your online friends http://uk.messenger.yahoo.com