Modifying a logical control unit

Complete this task to modify a logical control unit (LCU) using the DS CLI.

You can perform the following modifications to an LCU using the DS CLI commands:

Change the subsystem ID to ensure it retains its unique identity
Change the system behavior so that it emulates an LCU type that allows your system to process DS CLI transactions
Change the behavior of consistency group creation
Change the system behavior for processing concurrent copy transactions

Perform the following steps to modify an LCU using DS CLI commands:

Issue the lslcu command to generate a report that lists the status of the LCUs that are associated with the storage unit. Enter the lslcu command at the dscli command prompt with the following parameters and variables:
```
dscli>lslcu -dev storage_unit_ID -l  
```
Use the report to determine the LCU or LCUs that you want to modify. The report contains details about the LCUs that you must use to issue the chlcu command for modifications.
Issue the chlcu command to implement one of the following types of modifications:
1. To maintain the unique identity that is associated with your logical subsystem within your Copy Services domain, you can change your subsystem ID (SSID). Enter the chlcu command at the dscli command prompt with the following parameters and variables:
```
dscli>chlcu -dev storage_image_ID -ss new_ss_ID lcu_ID
```
  Note: The new SSID that you specify replaces the existing SSID value in the initial target LCU ID.
2. To provide your system a format that allows you to process DS CLI transactions. Enter the chlcu command at the dscli command prompt with the following parameters and variables:
```
dscli>chlsu -dev storage_image_ID -lcutype [3990-3 | 3990-tpf | 
3990-6 | bs2000]  lcu_ID
```
  Notes:
  1. The target LCUs are changed to the LCU type that you designate
  2. When you designate multiple LCUs, separate multiple IDs and multiple ID ranges with a space. Separate your LCU range with a dash (-) between the first and last number of the range.