In several time, when Huawei requested change a especific Blade in the E9000, We doesnt know to how identify the slot number becuase it doesnt have a label with slot number.
There are 3 forms to identify the slot number, becuase it is assigned according the model, like:
When the blade is CH121, The numbers are...

The CH240 , CH242, and CH242 V3 full-width compute nodes are installed in slots 1 to 8.

The CH220, CH221, CH222 full-width compute nodes are installed in slots 9 to 16.

