Re: SAS expander

On 11/10/24 13:48, Don Y wrote:

I have several DAS boxes that a have built-in SAS expanders (to put up to
90 drives on a SAS cable).  But, ALL must be SAS or ALL must be SATA.
I am not sure if that is a requirement of the hardware or firmware
(but it is a reasonable one)

That sounds like a potential gotcha.  I don't know if it's spec and / or implementation.

Do these just mechanically package the drives?  Or, do they include a
SAS expander and present to the host as a SAS interface?  (that would
be cool!)

I've seen both.
I think it depends on the number of drives that go in the enclosure and the physical size thereof.  It seems as if the ones that hold fewer drives might simply be pass through while the ones that hold more drives probably have expanders in them.
--
Grant. . . .