HP AA979A - StorageWorks SAN Switch 2/8V Release Note page 24

Table 6 Fabric OS area information (continued)
Fabric OS Area
WWN card FRU repair
Zoning
Zoning
24 Advanced Web Tools updates
Description
If an HA failover or power cycle occurs during a FRU replacement on the
WWN card, the Core Switch 2/64 or SAN Director 2/128 becomes
nonoperational.
CAUTION: When performing a FRU replacement on a WWN card,
complete the FRU procedure before attempting an HA failover or power
cycling the chassis.
Issue: Domain 0 in a zoning configuration file is invalid but has not been
previously enforced.
Workaround: Before upgrading a switch to Fabric OS 4.2.x or later, ensure
that the fabric's zoning configuration does not contain domain ID 0, which
is used for zoning. This is specific only to 4.x switches.
When enabling a new zone configuration, the user must ensure that the size
of the zone configuration does not exceed the minimum size supported by
all the switches in the fabric. Zone configuration sizes can be determined by
executing cfgsize on all the switches in the fabric.