Cx7 issue

[root@cmastora002 ~]# mst start;mlxlink -d /dev/mst/mt4129_pciconf0 -m -0 Starting MST (Mellanox Software Tools) driver set Loading MST PCI module - Success
[warn] mst_pciconf is already loaded,skipping Create devices
-W- Missing "lsusb"command,skipping MTUSB devices detection Unloading MST PCI module (unused) - Success
-E- Showing PDDR raised the following exception:
Failed to send access register: ME_ICMD_STATUS_EXECUTE_TO

Hello @suhuiguang,

Thank you for posting your query on our community. Based on the error posted, it appears that the drivers have not been loaded properly. Could you please reload the drivers with $ /etc/init.d/openibd restart and try again.