Exercise 5 (1 pt.): The Large Synoptic Survey Telescope (LSST)2, when in operati

Question

Exercise 5 (1 pt.): The Large Synoptic Survey Telescope (LSST)2, when in operation, is expected to send 8 million gigabytes of data to Earth per year3. Assuming that the LSST remains in operation for ten years, how many terabytes of data will be produced during that ten year period? Now, assuming that hard disk storage costs remain constant, and, that 64 TB of hard disk storage costs $6,800 (today's price4), how much will it cost, in dollars, to store all the data that will be generated by the LSST over a ten year operational period, if all that data is stored in

Explanation / Answer

Amount of data sent to earth in one year = 8000000 GB (8 million GB)

Amount of data sent to earth in 10 years = 10*8000000 =80000000 GB (80 million GB)

1000 GB of data = 1 TB

1 GB of data = 1/1000 TB

80000000 GB of data = 80000000 *(1/1000) = 80000 TB

Total no. of 64 TB disks needed to store 80000 TB of data = 80000/64 = 1250

Cost of one 64 TB disk storage = $6800

So cost of 1250 64 TB disk storage = $6800 * 1250= $8500000 = $8.5 million

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