You do not need labels for the old hard drive, just use the actual partitions and create the line entries in /etc/fstab
For example lets say the old hard drive is attached to the system as hdb and has three partitions all ext3 then the entries would looke like;
Code:
/dev/hdb1 /media/part1 ext3 defaults 1 2
/dev/hdb2 /media/part2 ext3 defaults 1 2
/dev/hdb3 /media/part3 ext3 defaults 1 2
Just remember to create the mountpoints (/media/part1{2,3}) beforehand;
mkdir /media/part1
After the drive is attached then you can check which partitions and filesystem(s) you really need by using something like; fdisk -l (that's the lower case letter L in the command) before creating the fstab entries and mountpoints BTW