LSI SAS6160 - Manual (Page 14)

Page 14 LSI Corporation | September 2010
LSISAS6160 SAS Switch User Guide Chapter 1: Overview | SAS Routing and Zoning
„ A zone set must be active for its definitions to be applied to the SAS domain. Zone
sets are activated in the SDM utility.
„ Only one zone set can be active at one time. When no zone set is active, zoning is
disabled and domain access is unrestricted.
„ Changes to the active zone set (for example, a change to zone group or zone set
membership, or a change to zone group permissions) do not take effect until the
next zone set activate command.
„ When the SAS topology changes (for example, when a host or storage attachment
is moved from one switch connection to another) you must manually redefine zone
group permissions within the active zone set. The switch does not do this task
automatically. Changes to the active zone set do not take effect until the zone set is
updated and reactivated.
„ Zoning is managed throughout the ZPSDS formed around the SAS6160 switch,
used to manage zoning, and any SAS 2.0 zoning expanders that can be linked back
to it without crossing a nonzoning expander. When zoning is enabled, zone group
and permission data are migrated automatically between the SAS6160 switches
and the SAS 2.0 zoning-enabled expanders throughout the ZPSDS. If a storage
configuration includes a legacy expander that is not zoning-enabled, that expander
and its attached devices inherit the zone group and permissions of the zone phy to
which it is connected.
„ To create a high-availability (failover) configuration, use one SAS6160 switch for
each data path between the host and the shared storage. SAS allows for only a
single path between endpoints. See
Figure 13 for more information.