Question: Compute the average time to read or write a 2048-byte sector of disk rotating at 14, 000 RPM, given that the seek time is 3ms,

 Compute the average time to read or write a 2048-byte sector

Compute the average time to read or write a 2048-byte sector of disk rotating at 14, 000 RPM, given that the seek time is 3ms, data transfer rate is 20 MB/sec, and controller overhead is 0.2 ms. Assume there are no pending jobs on the disk. Discuss with the help of necessary figures the disk storage systems RA1D0 through to RAID6 and outline the differences between them with particular emphasis on the write update schemes of RAID-3 and RAID-4, and advantageous scenarios for RAID-5 vis-a-vis RAID-4

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