Managing Host Access To Volumes - HP 2000fc Reference Manual

5. Click OK to confirm the operation or Cancel to stop it.
If you clicked OK, a message indicates whether the operation succeeded. If it
succeeded, the volume is removed from the Volume Menu panel.

Managing Host Access to Volumes

Each volume has default host-access settings that were set when the volume was
created; these settings are called the default mapping. The default mapping applies
to any host that has not been explicitly mapped with different settings. Explicit
mappings for a volume override the volume's default mapping.
On the Map Hosts To Volume page you can change a volume's default mapping, and
add, change, or remove explicit mappings. A mapping can specify read-write, read-
only, or no access through one or more controller host ports to a volume. When a
mapping specifies no access, the volume is said to be masked. Access privileges
apply to host ports on the controller that owns the volume's virtual disk. For
example, if a volume is owned by controller B, access privileges apply to controller
B port 0 (B0) and port 1 (B1). During a controller failover, when controller B is
inactive and the volume is temporarily owned by controller A, access privileges
apply to ports on controller A. In an FC system, if host port interconnects are
enabled, access privileges for port A0 also apply to B1, and access settings for A1
also apply to B0.
Volume mapping settings are stored in disk-drive metadata. If enough of the drives
used by a volume are moved into a different enclosure, the volume's virtual disk can
be reconstructed and the mapping data is preserved.
To manage the list of hosts that can be mapped, see "Managing the Global Host
List" on page 95.
To add, change, or delete explicit mappings, see "Managing Volume Mappings" on
page 99.
For information about how controllers present mapped volumes in different
configurations during normal operation and failover, see Appendix C.
94 HP StorageWorks 2000 Family Modular Smart Array reference guide • August 2008