>>>>> "KY" == KY Srinivasan <kys@xxxxxxxxxxxxx> writes: KY, KY> "At the time thin-provisioning was defined, the discovery KY> information was first proposed in READ CAPACITY 16 command. And then KY> moved into the new dedicated VPD page - B2h. You can see the KY> information reported in this VPD page is richer than READ CAPACITY KY> 16 command. As this transition happened during we added the feature, KY> Windows uses the newer method that based on VPD page B2h. It looks KY> Linux tries to use both new and old method which is weird to me." The READ CAPACITY(16) response is not optional. SBC3r36 section 4.7.3.3 Thin provisioned logical unit: The device server in a thin provisioned logical unit shall set: a) the LBPME bit to one in the READ CAPACITY (16) parameter data (see 5.16.2); and b) the PROVISIONING TYPE field to 010b (i.e., thin provisioned) in the Logical Block Provisioning VPD page (see 6.6.4). That's a "shall". The LBP VPD elaborates on the provisioning type, commands preference, etc. But it's all gated by LBPME=1 in the READ CAPACITY(16) response. -- Martin K. Petersen Oracle Linux Engineering _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
