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Whats the point of Raid 5?

post #1 of 4
Thread Starter 
Why would you need to use a raid 5 if you could just backup the hdd. Why do you need redundancy? If I can just create a backup every once in a while, then if a hdd fails I just take it out and restore the back up image, why do a raid 5? The convince on not having to do backups maybe?
post #2 of 4
Quote:
Originally Posted by hoth17 View Post
Why would you need to use a raid 5 if you could just backup the hdd. Why do you need redundancy? If I can just create a backup every once in a while, then if a hdd fails I just take it out and restore the back up image, why do a raid 5? The convince on not having to do backups maybe?
Real-time back up with near (N-1) RAID0 performance with the ability to continue operating with a single failed HD.
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post #3 of 4
Thread Starter 
how close is the performance to a raid 0? lets say 2 in raid 0 and 3 in raid 5.

do you need an even amount of drives for a raid 0?
post #4 of 4
on software raid like intel and nvidia raid 5 is significantly slower due to the fact that the cpu has to do all the calculations as to where the data is store. A hardware card like the dell PERC5/i card there is a drop in performance I would say 10-20%. There is also the advantage that you do not loose any data because if your drives dies you lose data from the last backup and the time of crash and if you use your pc as a media center and have large amounts of data it much harder to back that data up to one hdd. Its good if you have lots of files and a hardware card to do raid 5. If you all you have is some music picture and games, I would say stick with raid 0 and back up your data regularly.
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