Question
Consider the Megatron 777 disk with the following characteristics: -10 surfaces with 10,000 tracks each; -Each sector is 512 bytes and each track on average
Consider the Megatron 777 disk with the following characteristics:
-10 surfaces with 10,000 tracks each;
-Each sector is 512 bytes and each track on average has 1000 sectors;
-20% of each track is used for gaps;
-The disk rotates at 10,000 rounds per minute;
-The time to move the head k tracks is 1 + 0.001k ms.
Answer the following questions about the Megatron 777.
(1) Determine the capacity of each cylinder of the disk.
(2) If a block were 32 sectors, how long would it take to transfer two consecutive blocks?
(3) What is the average time to update two blocks of data on the same track? Assume the read/write head is on this track.(Assume two blocks are not consecutive)
(4) Suppose the disk head is at track 2500 that is 1/4 of the way across the tracks. If the next request is for a block on a random track, calculate the average time to read this block.
Thanks!
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