You would cd to it with this command:
bash: cd: /mnt/hdb2/home/joel: No such file or directory
It just looks like you accidentally used the device name there instead of just plain old hd. Unless, of course, you were tweaking the earlier commands a little before running them on your system.
If you still get an error, then it's either the wrong partition, or a slightly different path than you recall. It really depends on how the Suse system was set up (with regard to partitions).