a.
Explanation of Solution
Solution:
“No”,
b.
Explanation of Solution
Solution:
Like the read operation in RAID-1, the write operation doubles the time as read because of its mirroring capability. If the system doesn’t use RAID-1, the access time for read operation will be half of the value. Consider that the disk arms are 180 degrees offset from one another.
c.
Explanation of Solution
Solution:
For the disk to be free, then 25% of the transaction must wait behind one transaction. If the system uses RAID-5 along with 8 disks (two sets of 4 disks) then the average disk access time would be:
d.
Explanation of Solution
Solution:
RAID-1:
- It requires 2*N disks.
- The cost of this will be $24,000.
2 sets of 4 disk RAID-5:
- It requires 133% of the number of disks.
- The cost of this will be $16,000.
- The MTTF is given as 20,000 hours...
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