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SAS and SATA question

K3nobi

Why can you use a SAS controller on a SATA drive but not the other way around?

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Short answer: SAS supports everything SATA does but not the other way around

 

Long: https://en.wikipedia.org/wiki/Serial_Attached_SCSI#Comparison_with_SATA

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12 minutes ago, General K3nobi said:

Why can you use a SAS controller on a SATA drive but not the other way around?

Presumably SAS drives are designed to only work in SAS mode whereas the controller can work in SATA mode?

Makes sense as using a SAS drive on SATA would be no real benefit and require extra cost to include SATA support in the drive.  Whereas using SATA drives on a SAS controller is likely more trivial (you aren't paying for it per drive for one thing) and potentially useful.

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