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Disk Redundancy Research

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Disk Redundancy Research

• What does RAID stand for?
Redundant array of independent disks
• When would we use RAID?
When need of advanced storage schemes are needed. Whether it is better performance, reliability and extra redundancy.
• Define the following types of RAID:
• RAID 0 – Block-level striping without parity or mirroring
• RAID 1 – Mirroring without parity or striping
• RAID 5 – Block-level striping with distributed parity
• RAID 6 – Block-level striping with double distributed parity. (Basically extended RAID 5)
• Why is RAID 0 of any use if it offers no redundancy?
Best if used in a High bandwidth need. video and picture editing, etc.
• Why do you think that RAID 1 can be the most expensive? Why would people utilize it if it’s so costly?
Because its disk overhead requires the drives to always be running.
Its 100% redundancy provides a guarantee that no data will be lost.
• If you, as a home computer user, were to purchase a form of RAID, which would you choose and why?
It all depends on what purpose I would choose to use a RAID for. If I was implementing a type of high traffic situation I would use RAID 5, RAID 0 in any high speed situation, and RAID 1 if high availability is needed.
• What is the difference between software RAID and hardware RAID?
Hardware raid is where a controller built into the motherboard or an Add-in card is used to populate the raid.
Software raid is where you use the program available to your operating system or a 3rd party program to make a raid in the GUI…...

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