We are about to add another DS4243 shelf with SATA drives, in an existing stack. We want to do this without downtime. On the last shelf in the stack order, I cannot remember which SAS cable should I unplug first. Is it the SAS cable connected to the filer or the SAS cable connected to the shelf next to last in the stack order? Please see attached diagram
Also, what do I need to do next after they are attached? What commands I need to run?
It does not really matter which cable you unplug first as long as you do it one at a time ☺
After physically attaching shelf you need to assign disks in new shelf to controller(s) using “disk assign”. It could be that disks will be assigned automatically if the whole stack is currently owned by single controller.