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RAID 5 with different drives

Gleb K
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In RAID5 there is no dedicated parity disk. Following your logic and how it really works every disk in the array is the parity disk. There IS a RAID level that uses one physical disk as the parity. I can't recall if it's JBOD or RAID2,3, or 4.

 

I'm not 100% sure on this but so long as they're the same capacity, same RPM, and have the same level of cache they should work OK together.

 

If one is 5400RPM w/ 64MB cache but the others are 7200RPM w/ 128MB or 256MB I THINK it can still work but your performance will be bottle-necked by the slowest drive (don't quote me on that Electronics Wizardry would probably have a more accurate answer for you).

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Hello,

 

    At home I have a 6TB WD red drive. I assume the performance is lower due to less cache and less RPM and therefore my question, is it possible to setup RAID 5 with the drive I have and two seagate ironwolf 6TB drives without loosing speed? (Maybe setting the WD drive as the parity drive)

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In RAID5 there is no dedicated parity disk. Following your logic and how it really works every disk in the array is the parity disk. There IS a RAID level that uses one physical disk as the parity. I can't recall if it's JBOD or RAID2,3, or 4.

 

I'm not 100% sure on this but so long as they're the same capacity, same RPM, and have the same level of cache they should work OK together.

 

If one is 5400RPM w/ 64MB cache but the others are 7200RPM w/ 128MB or 256MB I THINK it can still work but your performance will be bottle-necked by the slowest drive (don't quote me on that Electronics Wizardry would probably have a more accurate answer for you).

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