Update mpi_issues.md

doc.zih.tu-dresden.de/docs/jobs_and_resources/mpi_issues.md

@@ -30,9 +30,9 @@ or setting the option as argument, in case you invoke `mpirun` directly
 marie@login$ mpirun --mca io ^ompio [...]
 ```
 
-### Mpirun on Partitions `alpha` and `ml`
-
-Using `mpirun` on partitions `alpha` and `ml` leads to wrong resource distribution when more than
+### Mpirun on clusters `alpha` and `power`
+<!-- laut max möglich dass es nach dem update von alpha und power9 das problem nicht mehr relevant ist.-->
+Using `mpirun` on clusters `alpha` and `power` leads to wrong resource distribution when more than
 one node is involved. This yields a strange distribution like e.g. `SLURM_NTASKS_PER_NODE=15,1`
 even though `--tasks-per-node=8` was specified. Unless you really know what you're doing (e.g.
 use rank pinning via perl script), avoid using mpirun.