>> I get the issue like this: >> 1. HBA support 3Gbps, level 1 expander support 6Gbps, and level 2 expander >> support 6Gbps; >> 2. level 1 is fine, and find that level 2 link rate is 6Gbps in DISCOVER command >> response. >> 3. LIBSAS think level 2 is 6Gbps by sas_ex_get_linkrate function, and send >> command to level 2 expander >> 4. LIBSAS link error. >> >[Jack Wang] >What do you mean by "LIBSAS link error", OPEN_REJECT(CONNECTION RATE NOT >SUPPORTED)? LIBSAS only get the error event through LLDD. >According to SAS2r15 7.8.3 I mean that HBA get link error. Sorry. >A SAS initiator port shall set the initial CONNECTION RATE field to: >a) the highest supported connection rate supported by a potential pathway as determined during the >discover process (e.g., based on the logical link rates of each logical link reported in the SMP >DISCOVER responses); or Sas_ex_get_linkrate function >b) the logical link rate of the logical phy used to transmit the OPEN address frame. MVSAS get value of linkrate from sas_ex_get_linkrate function(child->linkrate) >If a SAS initiator port selected a connection rate based on discover process information but the connection >request results in OPEN_REJECT (CONNECTION RATE NOT SUPPORTED), then the discover process >information is no longer current and the discover process should be run again. Fail again. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
