Dear lustre-discuss, We are encountering issues with lustre clients supporting truescale infiniband 73xx HCAs with recent RHEL6 kernels. Clients are unable to load the o2iblnd module. Anyone have success using truescale IB and builds for the lustre master release ? We have attempted lustre version tags 2.5.3.90 & 2.7.58 with RHEL6 kernel 2.6.32-504.16.2. We are using redhat supplied ofed/IB drivers. This combination supports various mellanox HCAs (using redhat supplied ofed/IB drivers). We had truescale IB working with lustre-client 1.8 release working with older RHEL6.4 & 6.5 kernels (+community supplied patches). regards, chris hunter yale hpc group