HP Storage Essentials NAS Manager Software - Manual (Page 408)

Provisioning Manager 376
• HSGs can consist of volumes (LUNs) only. You do not need to specify initiators.
• When you select an initiator for the host security group, the initiator has to be registered with the
CLARiiON storage system.
• You can have more than one initiator in a security group if you have the proper multipathing
software installed on that particular host where the initiator is located.
Engenio Storage Systems
• When you create the HSG by using the management server, the HSG appears as a host with its
volumes and ports displayed underneath the tree in SANtricity.
• When you create the HSG by using the management server, you can specify the controller, but
not the port for the HSG.
• An initiator is equivalent to a host port in SANtricity.
• You can have multiple volumes and initiators in the HSG.
• If you create a volume on a host and you have no multipathing on the host, make sure the
volume is on the preferred path. You can make sure the volume is on the preferred path by using
SANtricity.
• The ID for a host security group changes when you rename the host security group.
• When creating a host security group, if you provide a volume, but not an initiator, the host
security group is created, but the volume is part of the Default Group, not the group you created.
This occurs because until a volume is assigned a host security group with an initiator, it is visible
to all initiators and is assigned to the Default Group. To assign a volume to a specific host
security group, you must add an initiator to that host security group.
• If you create an HSG for a Unix host on an Engenio array, you must use SANtricity to change the
host mode of the HSG to Linux to be compatible with the Unix host. If you do not, the Unix host
will show a large number of LUN numbers available. You must use SANtricity to change the host
mode because it is not possible to select the host mode when creating an HSG on an Engenio
array. The HSG will be created with the Windows NT host mode by default if it is not manually
changed.
EMC Symmetrix Storage Systems
If no LUN security is turned on for an FA port, all volumes assigned to the FC port are visible by
hosts that are on the SAN and have been zoned by the SAN. All volumes assigned to the FC port
appear in the mapped category.
When you create the HSG on a Symmetrix storage system, you are creating LUN mapping and
masking in one step. In the native tools for Symmetrix storage systems, you will not see the HSG you
created by using the management server. Instead you will see a volume binded to a port and a
masked LUN to a host in the native tools.
• HSG is associated with individual ports
• HSGs only allow one initiator for host security masking.
• To create a host security group, you must specify a port, initiator and a volume.
• Every port has a LUN HSG, even if no LUNs are defined for that port. To bind a LUN to a port,
edit the host security group and add the desired LUN to a port.
• You can also add LUNs to a Mask HSG. To add initiators, you need to create the HSG.