harddisk

Question

Consider magnetic disk with the following parameters: Average seek time = 12 ms

Rotation rate = 3600 RPM

Transfer rate = 3.5 MB/second

# of Sectors per track = 64

Sector size =512 bytes

Controller overhead =5.5 ms

What is the average time to read 8 KB in 16 consecutive sectors in the same cylinder?

My confusion,

While calculating the transfer time we should consider 8kB*16 data or 8 KB? 

In the given solution they have considered only 8KB?

Is it like same cylinder means no need to multiply by 16 and if given different cylinder then we need to consider 8kB*16?

 

Comments

Many places no of successive sectors are multiplied that's why I m confused

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We multiply no. of sectors with what? With sector capacity right? Here 8KB is not the sector capacity. 512B is.

See you are also multiplying (no. of sectors) with (size of the each sector). No. of sectors is 16 and size of each sector is 512B. It becomes 16*512B=8KB only. They have not shown this multiplication but the result is same.

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Got it thanks