Re: SAI_READ_CAPACITY_16?

[Ming Zhang <mingz@ele.uri.edu>]

we tested several iSCSI initiator/target combinations that work with
>2TB devices in current 2.6.11.x kernel.

our experience is that some code only support cdb len 10 or 12. you need
16.

Ming


On Wed, 2005-04-06 at 12:00, Salyzyn, Mark wrote:
> Troubled spoofing back >2TB support in the aacraid driver.
> 
> For some reason, sd_read_capacity (in sd.c) in the 2.6.9-5.EL (RHEL4)
> kernel is not issuing the SERVICE_REQUEST_IN+SAI_READ_CAPACITY_16
> command to the queuecommand handler (the handler is not even called),
> even though it instruments up that the command is issued (and returns
> not supported). The READ_CAPACITY call makes it through successfully
> indicating 0xFFFFFFFF capacity to trigger the SAI_READ_CAPACITY_16
> request fine. Could there be a bug in the scsi layers reissuing commands
> reusing the request structure misdirecting the requests?
> 
> The only changes to the current tree appear to be in the handling of the
> request sense information, so I expect the same behavior from
> latest/greatest.
> 
> Any successes in the current tree with >2TB support being reported by
> the SAI_READ_CAPACITY_16 call?
> 
> Sincerely -- Mark Salyzyn
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