So I was shopping for new hard drives on Newegg.com and ended up purchasing three hard drives. I ended up purchasing a Western Digital Elements 120GB External Hard Drive, a Cirago CST1000 250GB External Hard Drive and a Western Digital Scorpio Blue 640GB 2.5″ Internal Hard Drive. The WD Elements and Cirago CST1000 are both external hard drives and will remain so purely for backups. The Cirago I will use to back up my computer and the Wester Digital Elements I will use to back up my PS3. Why you ask? Well I have finally bit the bullet and decided that I will swap my PS3’s current 40GB hard drive for a much larger 640GB  hard drive.

But what does this all have to do with the title? Well, as I was shopping and comparing amongst the many available choices of hard drives on Newegg, I found that I was well, very confused and undecided. I knew I wanted a small and medium external and a large 2.5″ internal. However, the reviews proved to be less than helpful as some people claimed DOA (Dead on Arrival) or that the plastic was flimsy, etc. So I decided to prototype a new rating method for hard drives:

(((($ / Mb) * MB/s) / MB) * in) * 10,000

What is that? Well here is a more legible version: ((((money / size) * throughput ) / cache ) * physical_size) * 10,000. Now, that all has to be in Mb and Mb/s – no Gb, no Tb – just convert it to Mb. So, let us take, for example a Western Digital Caviar Green WD20EARS 2TB SATA 3.0Gb/s 3.5″ Internal Hard Drive. If we use the formula above, this drive rates out to 88.111495972 or 88.1. How did we arrive at that? Well, the drive is  2TB, with a thoroughput of 3.0Gb/s and has a 3.5″ formfactor size. It has a 64MB cache and we found it priced at $109.99. If we plug in the above formula, we come to this:

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