Specifications

3–14 Controller and Host Addressing
Assigning Access Paths
Different operating systems may not tolerate other operating systems’ access to their
units. To limit or restrict host access to certain units, the HSG80 array controller
allows you to specify unit access privileges. You may specify unit access on a unit-by-
unit basis.
You can enable host access to a specific unit by mapping it as accessible through the
specified host paths. A path is the logical connection between the host and the
controller and the path is referenced by the name attached to the logical connection.
Once the unit is set for access through a path, the access privilege is defined.
By default, host access is set to ALL. If you wish to have the unit access limited, you
must first disable access to ALL, then set it to a specified host access path.
Access paths may be enabled with the ENABLE_ACCESS_PATH switch. You can
define a unit’s access privileges with “ADD UNIT,” page 7–27. These access
privileges can be changed using “SET unit-number,” page 7–126.
IMPORTANT: Before enabling the access path, make sure that the host
connections have been added with the command, “SET connection-name,”
page 7–89.
.See “Configuring in Multiple-Bus Failover Mode,” page 5–20 on working in a
multiple-host environment.