> > >"If the requested field of the HPB Region or HPB Sub-Region is out > > > of > > > range, then the device shall terminate the command by sending > > > RESPONSE > > > UPIU with CHECK CONDITION status, with the SENSE KEY set to ILLEGAL > > > REQUEST, and the additional sense code set to INVALID FIELD IN CDB" > > > > You don't need to worry about setting invalid ppn to HPB-READ command > > - > > you'll never get a read request for those LBAs. > > > > Say all subregions are 16MB and the last subregion of the last region > > is 10MB. > > Keep all sizes the same - 16MB, and the ppn of the last subregion > > contain some invalid data. > > But you'll never get a read request for those LBAs anyway - they > > don't exist, > > so you'll never get to use those invalid ppns. > > > > Thanks, > > Avri > > Hi Avri > ah, I don't know if your above comments are inline with Spec. > > Spec: > "A HPB Region is divided into HPB Sub-Regions. HPB Sub-Region size is > specified by the bHPBSubRegionSize parameter of Geometry Descriptor. > HPB Sub-Regions are equally sized except for the last one which is > smaller if the last HPB Region is not an interger multiple of > bHPBSubRegionSize." > > It is not invalidate ppn concern, it is illegal request issue in sense > key. > > Kind regards, > Bean That's a good point. If the size of the last sub-region is not specified correctly, the map data cannot be properly fetched. I will support the non-full sized last sub-region in a new patch. Thanks, Daejun
