HP Brocade 4Gb SAN Switch for HP BladeSystem p-Class - Manual (Page 141)

Fabric OS 5.0.0 procedures user guide 141
Effect of changes in a
production fabric
Zone changes in a production fabric can result in a disruption of
I/O under conditions where an RSCN is issued as a result of a zone
change and the HBA is unable to process the RSCN fast enough.
Though RSCNs are a normal part of a functioning SAN, the pause in
I/O may not be acceptable. For these reasons, HP recommends that
you perform zone changes only when the resulting behavior is
predictable and acceptable. Changing HBA drivers can correct the
situation.
Confirming operation After changing or enabling a zone configuration, confirm that the
nodes and storage are able to identify and access one another.
Depending on the platform, you may need to reboot one or more
nodes in the fabric with the new changes.
Table 22 Considerations for zoning architecture (continued)
Item Description