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Old 04-16-2009, 08:32 PM
 
Location: Lemon Grove, CA USA
1,055 posts, read 3,646,994 times
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Yes it protects you from drive failure but it is still not a backup. Two different things.
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Old 04-16-2009, 08:49 PM
 
11,715 posts, read 36,336,945 times
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Originally Posted by Jesse69 View Post
Doesn't Wiki say that RAID 5 protects you from data loss from 1 failed hard drive?
It does but that's not a backup. Again, what happens if you accidentally delete a file from your RAID array? How's RAID going to get it back for you? Hint: It's not.
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Old 04-16-2009, 09:10 PM
 
16,308 posts, read 25,264,005 times
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Originally Posted by Jesse69 View Post
Doesn't Wiki say that RAID 5 protects you from data loss from 1 failed hard drive?
RAID 5 is a fault tolerant system that does protect your from a single drive failure. RAID 5 is designed to only protect that data changed or added since the last backup and nothing else.

But, (and it is a big but) the single greatest reason for data loss is human error, a.k.a. the "oops factor", then factor in all the other non-drive failures, from software (application and OS) crashes, viruses, worms, deliberate attacks, unintentional acts, controller failures, power spikes-outages, corrupted partition tables, MBRs, theft, fire, natural disasters,.......... well there is the short list, hopefully you get the idea.

RAID 5 is in no way a substitute for backups.
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Old 04-16-2009, 09:20 PM
 
16,308 posts, read 25,264,005 times
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Originally Posted by Jesse69 View Post
I have the CC1H firmware and it still failed!
Drives today are pushing the limits of data density, and they are electro-mechanically devices that are made as cheaply as possible, or "just good enough", to keep the cost down (read competitive).
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Old 04-16-2009, 09:52 PM
 
Location: Wicker Park, Chicago
4,791 posts, read 13,328,156 times
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Quote:
Originally Posted by EscapeCalifornia View Post
It does but that's not a backup. Again, what happens if you accidentally delete a file from your RAID array? How's RAID going to get it back for you? Hint: It's not.
I never accidentally delete stuff, so I'm not worried about human error. ALL of my data loss occurred because of hardware failure or loss.
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Old 04-16-2009, 10:04 PM
 
11,715 posts, read 36,336,945 times
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Originally Posted by Jesse69 View Post
I never accidentally delete stuff, so I'm not worried about human error. ALL of my data loss occurred because of hardware failure or loss.
OK, good to know you never make mistakes. So what happens when your RAID array gets corrupted due to a power failure or software/firmware glitch?
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Old 04-16-2009, 10:10 PM
 
Location: Wicker Park, Chicago
4,791 posts, read 13,328,156 times
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Originally Posted by EscapeCalifornia View Post
OK, good to know you never make mistakes. So what happens when your RAID array gets corrupted due to a power failure or software/firmware glitch?
Power Failure - I have TWO Cyberpower 900W UPS / battery backup devices! One for my computer and one for my upcoming NAS and wifi router!
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Old 04-16-2009, 10:11 PM
 
11,715 posts, read 36,336,945 times
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Originally Posted by Jesse69 View Post
Power Failure - I have TWO Cyberpower 900W UPS / battery backup devices! One for my computer and one for my upcoming NAS and wifi router!
Well it sounds like you're got it all covered. There's no possible way your RAID array can ever let you down.
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Old 04-16-2009, 11:48 PM
 
Location: Cicero, NY
625 posts, read 1,645,226 times
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Originally Posted by EscapeCalifornia View Post
Well it sounds like you're got it all covered. There's no possible way your RAID array can ever let you down.
unless there is a fire, theft, water mishap, etc
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Old 04-17-2009, 06:30 AM
 
10,752 posts, read 18,005,309 times
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Quote:
Originally Posted by Jesse69 View Post
Doesn't Wiki say that RAID 5 protects you from data loss from 1 failed hard drive?

Stay away from Seagate Drives people! THEY STINK AND ARE FAILING A LOT!!
RE: RAID, try re-reading my post. Your opinion on Seagate is just that, opinion, I've used nothing but Seagate in my own systems and it's all we use in our custom builds at work and we've had very good results with them.
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