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Forum Discussion
Failures of various RAID modes.
I'm intrigued by the failures. dbott67 wrote: ........ and 2 multiple disk failures where I had to replace the drives and restore from backup. In each case, I was able to recover without dat...
@StephenB
I was trying to avoid a discussion about RAID10 versus RAID5/RAID6. It's all covered elsewhere.
Unfortunately you have taken into account the probability of failure and NOT how long the system is at risk, once 1 disk has failed.
RAID10 is very quick to rebuild, as it has a direct mirror. Other RAIDs require significantly more time to rebuild, and are hence at risk for longer.
The suggestion is that on large systems, it is ALMOST a certainty that you will have a second failure whilst rebuilding a RAID6 system.
I am not an expert, and do not propose that I know enough about it to argue persuasively with you.
I did look into it for many days and came to the conclusion that for medium to large systems, RAID5 should be dead, RAID6 dying and RAID10 the (current) way to go. (My words)
I will try and find some articles that I read about this, and post these tomorrow.
It's almost my bedtime :)
I was trying to avoid a discussion about RAID10 versus RAID5/RAID6. It's all covered elsewhere.
Unfortunately you have taken into account the probability of failure and NOT how long the system is at risk, once 1 disk has failed.
RAID10 is very quick to rebuild, as it has a direct mirror. Other RAIDs require significantly more time to rebuild, and are hence at risk for longer.
The suggestion is that on large systems, it is ALMOST a certainty that you will have a second failure whilst rebuilding a RAID6 system.
I am not an expert, and do not propose that I know enough about it to argue persuasively with you.
I did look into it for many days and came to the conclusion that for medium to large systems, RAID5 should be dead, RAID6 dying and RAID10 the (current) way to go. (My words)
I will try and find some articles that I read about this, and post these tomorrow.
It's almost my bedtime :)
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