Breather Hole
Like all other hard disks, the 120GB Momentus 5400.2 comes with a breather hole. In this case, it's on the top plate.
The breather hole allows condensation inside the hard disk to escape as well as equalizes the hard disk's internal pressure with the ambient pressure. So, please make sure you do not occlude the hole when you install the hard disk!
Jumpers And Connectors
At the end of the PCB are the PATA interface and jumper block (from left to right).
Since most notebooks only have a single hard disk bay, there's usually no need to change it from the default setting of Master (no jumper installed).
Total Capacity
The 120GB Momentus 5400.2 drive has a total capacity of 120,031,477,760 bytes.
But after formatting it in NTFS, only 119,960,240,128 bytes were available. About 71GB was lost to formatting.
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