124 Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1
4.6.3  Viewing the local port mask
To view the local port mask for the system, use the lssystem command, as shown in 
Example 4-2.
Example 4-2   Viewing the local port mask
IBM_Storwize:ITSO:superuser>lssystem
id 000001003D600126
name ITSO
location local
partnership
...
...
local_fc_port_mask 0000000000000000000000000000000000000000000000000000000000001111
partner_fc_port_mask 1111111111111111111111111111111111111111111111111111111111111111
...
4.7  Other administrative procedures
In this section, we discuss other administrative procedures.
4.7.1  Removing a control enclosure from a clustered system
Removing a control enclosure from a system causes a loss of access to drives in this control 
enclosure and any expansions enclosures connected to this control enclosure. If not planned 
and executed carefully and correctly, this procedure can cause disruption in access to storage 
or data loss. Make sure that you have current and verified data backups before removing a 
control enclosure from a system. Follow carefully the enclosure removal procedure that is 
provided at this IBM Knowledge Center web page.
4.7.2  Shutting down the system
You can safely shut down an Storwize V7000 cluster by using the GUI or CLI.
After you shut down the entire cluster, you need to power it on manually to start the system 
again. Make sure that someone is available with physical access to the IBM Spectrum 
Virtualize hardware who can start the system after it is shut down.
Before shutting down the cluster, make sure that all hosts that have volumes mapped from the 
system are prepared for the storage system shutdown. This can be achieved by several 
methods, as shown in the following examples:
/SM590000Shutting down the host. This is the safest option.
Note: For systems with enabled encryption, ensure that the cluster can access at least one 
valid encryption key provider. Access to an encryption key provider (USB key or a key 
server) is required at start time to unlock encrypted data.
Also, never shut down your IBM Storwize V7000 system by powering off the PSUs, 
removing both PSUs, or removing both power cables from the enclosure. It can lead to 
data loss.