If the drive is still mountable then mount it and type "mount" on the command line.
You should see something like this:
[root@blah bin]# mount
/dev/cciss/c0d0p2 on / type ext3 (rw)
none on /proc type proc (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
usbdevfs on /proc/bus/usb type usbdevfs (rw)
/dev/cciss/c0d0p1 on /boot type ext3 (rw)
none on /dev/shm type tmpfs (rw)
As you can see here, my /boot and / are ext3....
Thing I can't figure... ext2 and ext3 are the same file system... only difference is ext3 has the journal and ext2 doesn't.... The layout and everything is the same so I don't know why data recovery would be any different.