External drive won't show on my computer but will on others...

I have a drive which has been causing me issues (firewire 800). Today, while trying to copy some files from that drive to a new one, both drives disappeared on the screen. I restarted the drives, and the new drive (Glyph) showed up, but the old one is not showing at all. These are both firewire800 drives running through a hub into my laptop. I cannot get the old drive to show no matter what I do. I have tried directly connecting the drive to the laptop, no dice. I even tried switching the drive into another enclosure, no luck.
However, I decided to try plugging the drive into the family iMac, and the drive shows up straight away. I thought changed the drive name might fix the issue but no luck. I have done repair disk in disk utility, and it shows no issues with the drive.
This must be some settings issue on my Macbook Pro - what do I do?

Hi Annie ...
When you post for help, please state which OS X is installed.
If you aren't sure, click About this Mac from your Apple menu 
Troubleshooting advice can depend on that information.
Please reply with that information.

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