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Calculate the storage efficiency of RAID level 1, 3, 5 and 6. The number of disk drives available are 6 each having capacity of 200 GB. Also find the usable capacity of each RAID level.
written 7.0 years ago by gravatar for teamques10 teamques10 ★ 68k modified 2.0 years ago by gravatar for sagarkolekar sagarkolekar ★ 11k
storage network management and retrieval
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written 7.0 years ago by gravatar for teamques10 teamques10 ★ 68k •   modified 7.0 years ago

Raid usable capacity is calculated simply by dividing the total usable capacity of the drive by the sum of the capacities of all the drives that underline the array

Given:

RAID 1 = 100(disks/2)/disks=100(6/2)/6=83.33%

RAID 2= 100*(disks-(disks+1)/log(2)/disks

RAID 3= 100(disks-1)/disks=100(5)/6=83.3%

RAID 4=100*(disks-1)/disks

RAID 5= 100(disks-1)/disks=100(5)/6=83.3%

RAID 6=100(disks-2)/disks=100(4)/6=66.66%
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