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6 Suppose a disk drive has the following characteristics • 6 surfa

6 Suppose a disk drive has the following characteristics • 6 surfa

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6. Suppose a disk drive has the following characteristics: •

6 surfaces • 1024 tracks per surface • 128 sectors per

track • 512 bytes/sector • Track-to-track seek time of 10

milliseconds • Rotational speed of 6000 RPM. a. What is

the capacity of the drive? b. What is the access time? .

Solution

a) The capacity of the drive=

6*1024*128*512=384MB

b)Rotational delay =

((60/6000RPM)*(1000/second))/2 =5ms

Access time=5ms+10ms= 15ms

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6. Suppose a disk drive has the following characteristics: • 6 surfaces • 1024 tracks per surface • 128 sectors per track • 512 bytes/sector • Track -to-track seek time of 10 milliseconds • Rotational speed of 6000 RPM. a. What is the capacity of the drive? b. What is the access time? . ...
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