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Raid 5 box failure

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December 28, 2011 7:24:23 PM

before i buy a dedicated raid 5 box theres something id like to clear up. What happens if the box itself goes down. In this case can the drives simply be installed in any other raid 5 controller and be brought back online? Or are the drives tied to the controller that set them up?

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a c 318 G Storage
December 28, 2011 7:57:30 PM

heywotismeuthem said:
before i buy a dedicated raid 5 box theres something id like to clear up. What happens if the box itself goes down. In this case can the drives simply be installed in any other raid 5 controller and be brought back online? Or are the drives tied to the controller that set them up?


You generally should use the same card or housing, as they may or may not be compatible with others, and even with identical equipment there are issues and there is no sure thing.

What box are you considering? And how many drives, drive quality, and drive size?

Always remember that a raid array is NOT a backup, but a fault tolerant storage. You still need to do real backup to protect important data.
December 28, 2011 8:07:00 PM

looking for a 4 drive raid 5 box with 4 3tb drives. How im meant to back up 9 tbs heaven knows given the cost. its only to store my media collection at the end of the day. I can tolerate the one drive failure tolerance but wheres the tolerance for the box?
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a c 318 G Storage
December 28, 2011 10:12:38 PM

There is no fault tolerance in most consumer raid boxes, not even redundant power. I tend to build my own raid arrays so I can replace parts if needed. It costs a little less, but it takes more administrative time. And I always put them on a good (APC) UPS.

In RAID 5 if one drive fails, and then an error is encountered on rebuild you can lose your data, so you really need to consider your backup options.
December 29, 2011 8:20:43 AM

seems theres no way round losing half your drives to a separate backup to overcome box liability. Ok tx for giving me a better handle on it.
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