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Hitachi DZ-MV100A DVD Cam
Posted by Philipp Esselbach on: 04/13/2001 02:21 PM [ Print | 0 comment(s) ]
Danīs Data has posted a review on the Hitachi DZ-MV100A DVD Cam
The format the DVD Cam actually records to is 77mm DVD-RAM discs. You donīt see those much - heck, you donīt often see full-size 120mm DVD-RAM - but theyīre a standard format, not a special Hitachi invention. And theyīre proper read-write media, good for many, many thousands of write cycles. Youīre not going to getting anything like that kind of durability out of tape.
The discs hold 1.4 gigabytes of data on each side, according to Hitachi. Hitachi are, of course, playing fast and loose with the truth; like all storage device manufacturers, they define a gigabyte as 1,000,000,000 bytes. Thatīs not what a gigabyte actually is. Itīs two to the power of 30 (1,073,741,824) bytes, just as a kilobyte is two to the power of 10 (1024) and a megabyte is two to the power of 20 (1,048,576).
The discs hold 1.4 gigabytes of data on each side, according to Hitachi. Hitachi are, of course, playing fast and loose with the truth; like all storage device manufacturers, they define a gigabyte as 1,000,000,000 bytes. Thatīs not what a gigabyte actually is. Itīs two to the power of 30 (1,073,741,824) bytes, just as a kilobyte is two to the power of 10 (1024) and a megabyte is two to the power of 20 (1,048,576).
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