unit 3 assignment 1
1. What does RAID stand for? A Redundant array of independent disks uses two or more drives in combination to create a fault-tolerant system that protects against physical hard drive failure and increase hard drive performance.
2. When would we use RAID? A RAID can be accomplished with either hardware or software and is usually used with network servers.
3. Define the following types of RAID:
a.) RAID 0 stripes data across all drives.
b.) RAID 1 is sometimes known as disk mirroring. Disk mirroring copies a disk or partition onto a second hard drive.
c.) RAID 5 is similar to striping, except the space equivalent to one of the hard drives is used for parity (error correction) to provide fault tolerance.
d.) RAID 6 gives us a second parity stripe. The purpose of doing all of the extra math to support this dual parity is that the second parity stripe operates as a "redundancy" or high availability calculation, ensuring that even if the parity data on the bad disk is lost, the second parity stripe will be there to ensure the integrity of the RAID set
4. Why is RAID 0 of any use if it offers no redundancy? Fast performs and additional storage.
5. Why do you think that RAID 1 can be the most expensive? Why would people utilize it if it’s so costly? You will have to buy additional space. It has increase read performance
6. If you, as a home computer user, were to purchase a form of RAID, which would you choose and why? 0, because it is faster
7. What is the difference between software RAID and hardware RAID? Cost, Complicity , Caching overhead and performance
2. When would we use RAID? A RAID can be accomplished with either hardware or software and is usually used with network servers.
3. Define the following types of RAID:
a.) RAID 0 stripes data across all drives.
b.) RAID 1 is sometimes known as disk mirroring. Disk mirroring copies a disk or partition onto a second hard drive.
c.) RAID 5 is similar to striping, except the space equivalent to one of the hard drives is used for parity (error correction) to provide fault tolerance.
d.) RAID 6 gives us a second parity stripe. The purpose of doing all of the extra math to support this dual parity is that the second parity stripe operates as a "redundancy" or high availability calculation, ensuring that even if the parity data on the bad disk is lost, the second parity stripe will be there to ensure the integrity of the RAID set
4. Why is RAID 0 of any use if it offers no redundancy? Fast performs and additional storage.
5. Why do you think that RAID 1 can be the most expensive? Why would people utilize it if it’s so costly? You will have to buy additional space. It has increase read performance
6. If you, as a home computer user, were to purchase a form of RAID, which would you choose and why? 0, because it is faster
7. What is the difference between software RAID and hardware RAID? Cost, Complicity , Caching overhead and performance