Re: Multi-Actuator SAS HDD First Look

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On Fri, 2018-03-30 at 12:07 -0600, Tim Walker wrote:
> Concerning how we are currently allocating commands to LUNs or the
> device as a whole, here is a list based on the current two LUN model.
> This model has LUN0 & LUN1, both reporting 1/2 the total storage. Our
> definition of "device based" is that it ignores the LUN field and
> executes the command on the entire device. [ ... ]

Hello Tim,

Can you clarify what "LUN field" means in this context? Are you referring
to a field in the SAS transport header or perhaps to the obsolete LUN
field in the SCSI CDB? Additionally, as far as I know every SCSI command
should be executed by exactly one SCSI LUN. I'm not aware of any support
in the SCSI specs for broadcasting a single SCSI command to multiple LUNs.

Thanks,

Bart.








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