Single-Hba Zoning; Single-Hba Zoning Example - EMC Connectrix EC-1200 Planning Manual

Zoning and Naming
3

Single-HBA Zoning

EMC recommends the practice of single-HBA zoning in the
Connectrix; that is, configuring each HBA with its own zone.
Members of the zone would consist of the HBA and one or more
Symmetrix ports with the volumes that will be used by the HBA.
Symmetrix
Symmetrix
Connectrix
Symmetrix
Compaq Director
Symmetrix
Compaq
Sun
Sun
Figure 3-1

Single-HBA Zoning Example

Figure 3-1 illustrates four servers, with each Symmetrix port
supporting a 2:1 fan-out. The ellipses represent the single HBA
zoning that would be configured using the Connectrix director's
Zoning GUI. Volume Logix gives each server its own set of volumes
that are protected from access by the other servers sharing the switch
and Symmetrix port resources.
This zoning practice provides a fast, efficient, and reliable means of
controlling the discovery process. The HBA will log in to only those
Symmetrix ports that it will use. If the device driver's auto-mapping
function is enabled, device objects will be created only for the storage
volumes that the HBA will use. As a result, a specific-type driver
(Windows NT, for example) will create only the appropriate device
objects, and will not create device objects for storage ports that are to
be used by other HBAs or servers.
Single-HBA zoning best simulates a single-initiator SCSI
environment, in that HBAs do not log in to other HBAs, and no
link-level services occur between adapters. This reduces the
reliability concerns that can be raised when mixing driver revision
levels, HBA types/vendors, and heterogeneous servers on the same
fabric.
3-7
Zoning