Okay, here is something to consider. A 700mb CD has roughly 5,872,025,600 bits over X amount of area (whatever the area of a CD is). A 250GB optical disc will have 2,147,483,648,000 bits in that same area. That means that there are 366 bits on a 250G optical disc in the place of a single bit on a standard CD. For a 3.9 terabyte disc there are a total of 34,304,762,800,000 bits and 5,842 bits squeezed in the area of a single CD bit.
That means that a single scratch will destroy 366 and 5,842 times the data on a 250gig and 3.9 TB disc (respectively) than the data destroyed on a single CD.
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Okay, here is something to consider. A 700mb CD has roughly 5,872,025,600 bits over X amount of area (whatever the area of a CD is). A 250GB optical disc will have 2,147,483,648,000 bits in that same area. That means that there are 366 bits on a 250G optical disc in the place of a single bit on a standard CD.
For a 3.9 terabyte disc there are a total of 34,304,762,800,000 bits and 5,842 bits squeezed in the area of a single CD bit.
That means that a single scratch will destroy 366 and 5,842 times the data on a 250gig and 3.9 TB disc (respectively) than the data destroyed on a single CD.