$ man -P cat mount | grep -C 10 -i acl
None. Note that the `ext' file system is obsolete. Don't use it.
Since Linux version 2.1.21 extfs is no longer part of the kernel
Mount options for ext2
The `ext2' file system is the standard Linux file system. Since Linux
2.5.46, for most mount options the default is determined by the
filesystem superblock. Set them with tune2fs(8).
acl / noacl
Support POSIX Access Control Lists (or not).
bsddf / minixdf
Set the behaviour for the statfs system call. The minixdf
behaviour is to return in the f_blocks field the total number of
blocks of the file system, while the bsddf behaviour (which is
the default) is to subtract the overhead blocks used by the ext2
file system and not available for file storage. Thus
% mount /k -o minixdf; df /k; umount /k
Amazing how you can find things in the manual, huh? Anyways, I would guess "mount /dev/hdb1 -o acl", but I'm not sure.