Question

A local online bitcoin wallet company, Luno is running out of capacity and performance with the current storage system. Luno has decided to own a RAID system at a reasonable cost to increase the speed, capacity, availability and scalability of the trading activities.

(a) Recommend a suitable RAID system for Luno. Provide your strong justifications.

Answer 1

Firstly let we understand that what is RAID:-

RAID (redundant array of independent disks) - It it is a setup consisting of multiple disks for data storage. They are linked together to prevent data loss and / or speed up performance. RAID primarily serves HDDs, through some SSDs use RAID as well, especially in hybrid arrays.

As a local online Bitcoin wallet company, LUNO is running out of capacity and performance with the current storage system.

So, for this problem Raid 5 will be the best.

RAID 5 is a redundant array of independent disks configuration that uses a disc striping with parity. Because data and parity are stripped evenly across all of the disks, no single disc is a bottleneck.

Raid 5 requires a minimum of three disks on which data is a striped, but not duplicated. As protection against disk failure, it uses parity spread across all drives to rebuild data if needed. This makes it highly reliable even in the event of data loss.

Raid 5 provides high performance and reliability. Not only is it secure, but equal so does a good job of a balancing reads and writes.

Raid five also uses the space of an entire disk to store parity, reducing the aggregate amount of data users can save.

Raid 5 combines a performance of Raid 0 with the redundancy of Raid 1, but it takes up a lot of storage space to do it. This level increases right performance since all drives in the array simultaneously serve write requests.

The benefits of RAID 5 primarily comes from its combined use of disk striping and parity. striking is the process of storing the consecutive segments of data across different storage devices, and allows for better throughput and performance. Raid 5 use two parity instead of a mirroring for data redundancy. When data written to a raid 5 drive, the system calculates parity and writes that parity into the drive.

By keeping data on each drive, any two drives can combine to equal the data stored on the third drive, keeping data secure in case of a single driver failure.

KEY POINTS OF RAID 5:-

• Provides Raid 0 performance with more economically redundancy.
• Uses HDDs more efficiently
• Consistent access to all data
• High datap comes from a parity information.
• Minimum of three and usually five HDDs per RAID group
• Most commonly used RAID system
• Fast read transactions
• Fault tolerance