Click 
to change to Modify mode.
Changing an access attribute to read/write
Before changing the access attribute from read-only or protect to read/write, considering the following:
Device Manager - Storage Navigator secondary windows must be defined for use in advance. Select Modify from the Data Retention secondary window to set access attributes and prevent other users or programs from changing storage system settings. When you close the secondary window, Modify mode is released. For more information on Device Manager - Storage Navigator secondary windows and Modify mode, see the System Administrator Guide.
Do not assign an access attribute to a volume if any job is manipulating data on the volume. If you assign an access attribute to such a volume, the job can end abnormally.
Make sure that the retention term is expired. If expired, the Retention Term column in the Data Retention window shows 0. To change the access attribute to read/write within the retention term, contact the customer support.
Make sure that the Expiration Lock indicates Disable > Enable. If it indicates Enable > Disable, changing to read/write is restricted. Contact your system administrator to change the access attribute. (See Enabling or disabling the expiration lock)
To change an access attribute to read/write:
Perform one of the following to display the Data Retention window.
For Command Suite:
On the Resource tab, expand the Storage Systems tree. Right-click the target storage system, then select Other Function.
Click Actions > Other Function > Data Retention to open the Data Retention window.
For Storage Navigator:
Click Actions > Other Function > Data Retention to open the Data Retention window.
Click to change to Modify mode.
Select an LDKC number in the LDKC list, select a group in which the CU belongs in the CU Group list, then click a CU in the tree.
Right-click a volume for which you want to change access attributes. You can select multiple volumes, select Attribute, then click Read/Write.
Click Apply to apply the setting.