Which managed systems are connected to the HMC can be queried with the command “hmc lssysconn“, here is an example output from hmc01:
$ hmc lssysconn hmc01
TYPE_MODEL_SERIAL_NUM STATE RESOURCE_TYPE IPADDR ALT_IPADDR SP SP_PHYS_LOC
8286-41A*32C4D4W Connected sys 172.16.100.13 unavailable primary U78C9.001.VYR0UCG-P1
8284-22A*326E12W Connected sys 172.16.100.12 unavailable primary U78CB.001.VYR0AI4-P1
8284-22A*326E13W Connected sys 172.16.100.15 unavailable primary U78CB.001.VYR0DM6-P1
$
There are 2 managed systems of the type 8284-22A (S822) and one 8286-41A (S814). Since the managed systems were registered by the LPAR tool and are therefore known, they can also be displayed more easily using “ms show“:
$ ms show
NAME SERIAL_NUM TYPE_MODEL HMCS MODEL_NAME
ms01 326E12W 8284-22A hmc01 IBM Power System S822
ms02 326E13W 8284-22A hmc01 IBM Power System S822
ms03 32C4D4W 8286-41A hmc01 IBM Power System S814
$
The model name is then also displayed in this output.