- How many I/O operations are issued by a RAID controller for a RAID5 write operation (lets assume 4 disks in total)?
- Compare and contrast RAID 4 and RAID 5 with respect to performance issues (read & write performances).
- Out of RAID10 and RAID01 – which is better for fault tolerance and why? (lets have 4 disks in total)
- What is RAID 5 Write Hole?
- What is degraded mode of operation?
- What is a Hot Spare?
- Calculate storage efficiency (in % terms) for the following configurations. Storage efficiency can be defined as the actual amount of real data than can be stored in a given storage system.
a) RAID1 – Disk1 size 50 GB, Disk2 size 50 GB.
b) RAID1 – Disk1 size 50 GB, Disk2 size 150 GB.
c) RAID4 – Disk1 size 50 GB, Disk2 size 50 GB, Disk3 size 50 GB.
d) RAID4 – Disk1 size 50GB, Disk2 size 100 GB, Disk3 size 150 GB.
e) RAID4 – Disk1 size 50GB, Disk2 size 100 GB, Disk3 size 150 GB, Disk4 size 200GB.
f) RAID5 – Disk1 size 50 GB, Disk2 size 50 GB, Disk3 size 50 GB.
g) RAID5 – Disk1 size 50GB, Disk2 size 100 GB, Disk3 size 150 GB.
h) RAID6 – Disk1 size 50 GB, Disk2 size 50 GB, Disk3 size 50 GB, Disk4 size 50 GB.
i) RAID6 – Disk1 size 50 GB, Disk2 size 100 GB, Disk3 size 150 GB, Disk4 size 200 GB.
j) Out of all RAID levels, Which RAID level has maximum storage efficiency?
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