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Mixing SATA II and SATA III in RAID 1

terminal2
By terminal2
in Storage Devices
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Go to solution Solved by beach_boy98,

Raid runs at the speed of the slowest drive. So max 3gbs

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Will mixing SATA 2 and SATA 3 in RAID 1 slow the overall read/write down from if it had been two SATA 3 drives?

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Raid runs at the speed of the slowest drive. So max 3gbs

 

Thanks!

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Will mixing SATA 2 and SATA 3 in RAID 1 slow the overall read/write down from if it had been two SATA 3 drives?

 

Hey there terminal2,
 
As @beach_boy98 pointed out, the RAID controller limits the speed of all drives in the array to the one with the slowest and the capacity of all drives to the one with the smallest. In your case, the limit would be 3Gb/s (SATA2) or 375MB/s. 
However, HDDs rarely exceed 200MB/s in transfer speeds so even if you run a regular SATA3 drive on a SATA2 port, you should see very little, if any, difference. :)
I would check if the two ports are controlled by the same SATA controller, because if they are not, you might have some trouble configuring them in a stable RAID1 mirroring array. 
 
Captain_WD.

If this helped you, like and choose it as best answer - you might help someone else with the same issue. ^_^
WDC Representative, http://www.wdc.com/ 

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