HP XP P9500 Storage - Manual (Page 190)

5. In the LUN ID column, click the LUN to open the LUN Properties window.
Releasing LUN reservation by host
The following explains how to release forcibly a LUN reservation by a host.
Prerequisites
•
You must have the Storage Administrator (system resource management) role to perform this
task.
CAUTION: If you perform the releasing a LUN reservation by a host, the host which is
connected to LDEV by LUN path is affected.
To release a LUN reservation by a host:
1. Click Ports/Host Groups in the Storage Systems tree.
The list of available ports appears in the tree.
2. In the tree, select a port.
The host groups corresponding to the port appear.
3. In the tree, select a host group.
Information about the selected host group appears on the right side of the window.
4. Select the LUNs tab on the right side of the window.
Information about LU paths associated with the selected host group appears.
5. On the menu bar, click Actions, Ports/Hosts Groups, and then View Host-Reserved LUNs. Or,
select View Host-Reserved LUNs from the lower right of the window. The Host-Reserved LUNs
window opens.
6. In the Host-Reserved LUNs window, select LUN to release the reservation by the host, and
then select Release Host-Reserved LUNs. The Release Host-Reserved LUNs window opens.
7. Confirm the settings and enter the task name in the Task Name box.
A task name can consist of up to 32 ASCII characters (letters, numerals, and symbols). Task
names are case-sensitive. (date) - (task name) is input by default.
8. Click Apply in the Release Host-Reserved LUNs window.
If the Go to tasks window for status check box is selected, the Tasks window appears.
LUN security on ports
To protect mission-critical data in your storage system from illegal access, apply security policies
to logical volumes. Use LUN Manager to enable LUN security on ports to safeguard LUs from illegal
access.
If LUN security is enabled on ports, host groups affect which host can access which LUs. Hosts can
access only the LUs associated with the host group to which the hosts belong. Hosts cannot access
LUs associated with other host groups. For example, hosts in the hp-ux host group cannot access
LUs associated with the windows host group. Also, hosts in the windows host group cannot access
LUs associated with the hp-ux host group.
Examples of enabling and disabling LUN security on ports
Enabling LUN security
In the following example, LUN security is enabled on port CL1-A. The two hosts in the hg-lnx
host group can access only three LUs (00:00:00, 00:00:01, and 00:00:02). The two hosts in the
190 Managing logical volumes