You could add an entry to the /etc/fstab file to mount the drive if automount isn't working for you. I can't tell you the exact syntax as I don't know what is contained in your box (nor do I want to know).
If you have one storage device (internal hdd) with one partition, the entry would look something like:
/dev/sda1 /media/hdd ext3 defaults 0 0
... assuming you formatted it ext3, change the filesystem type if you need to. If you have one drive w/ 2 partitions they'd be sda1 & sda2, if you had 2 drives they'd be sda & sdb, etc... etc...
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Ps. You can google linux & fstab for more information & examples...