I need help with following question 1.You are designing a system that medical pr

Question

I need help with following question

1.You are designing a system that medical professionals will be using to obtain medical records. Thus, recovery from disk failures is extremely important. No data can be lost, and we are not evaluating speed or speed of recovery. Consider the 7 RAID schemes and SLED. You have 10 drives to work with

a.Which one would perform the worst per this stipulation? My asnwer RAID 0

b.Which one would perform second worst per this stipulation? My answerRAID 4

c.Which one would perform best per this stipulation? My answer Raid 2

d.Which one would perform second best per this stipulation? My answer Raid 1

2.You are storing video on a CDROM. The video is 24 FPS with a resolution of 1920x1080 (using 24- bit color). If the video is 30 minutes calculate the compression ratio required to store this movie on one CD?

Please help

Explanation / Answer

2.)

Total Bandwidth Required: [UNCOMPRESSED]: 1920*1080*24*24+ 2*(960*1080*24*24)=2.39 Mb/s (luminance + chrominance)

A Cd on assuming 700 MB storage capacity, time of video is 30 minutes =>

SpEEed thus required [COMPRESSED] = 700*8 Mb / 30 *60 s =3.11 Mb/s

Now,

Compression ratio=Uncompressed Size/Compressed Size

Accordingly ratio can be calculated.

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