Macbook External Hard Drive Help Please!

[iPGCmacbook]

Hello, i am new to the forum since i just bought this Macbook from a friend.

This, is the Laptop Detail so you guys exactly what macbook i am using.
Model Name: MacBook
Model Identifier: MacBook1,1
Processor Name: Intel Core Duo
Processor Speed: 1.83 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache (per processor): 2 MB
Memory: 1.25 GB
I am a photographer and i need a lot of memory space, so i bought a External Hard Drive and said why dont i run my laptop of the External Hard Drive. So i began too. I did the process of Splitting the Hard Drive into two sections Install - Which had the Snow Leopard 10.6.3 Update and the Other sections Leopard - Was where ill run my laptop off.

Everything worked great till two days ago my laptop began running very very slow which was very weird since the hard Drive is 2 TB. I tryed to Repair it in Disk Utility and it frooze. So i restarted to computer and VANISHED was the Leopard Section of the External Hard Drive. The macbook detects the Install section but not the leopard now i cant find it anywhere.

Can anyone help me or give a suggestion about how to find the missing section of the External Hard Drive??

Thank PGC!

 

[simsaladimbamba]

Can you see the external HDD and even partition you installed Mac OS X 10.6 Snow Leopard onto in Disk Utility booted from the older Mac OS X installation on the MB's internal HDD or the Installation DVD?

Guide on how to use Disk Utility from the restore / installation DVD.

Format Your Hard Drive Using Disk Utility
Partition Your Hard Drive With Disk Utility

Using Disk Utility - Formatting, Partitioning, Verifying, and Repairing Disks

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Btw, as your MB is limited to Firewire 400 as fastest interface (disregarding the Gigabit Ethernet port), using the internal HDD as boot drive will be faster.
You can even replace the internal HDD quite easy:

MacBook, MacBook Pro: Replacing the Hard Disk Drive, transferring data to the new HDD​

How to format a new HDD to install Mac OS X or make a bootable copy onto​

Btw, "memory" is not the same as "hard drive capacity":
What is Computer Memory? RAM vs Hard Drive
RAM vs. Hard Disk