7 Controller A3 Host 2
8 Controller B4 Management server
Windows Server (64-bit) configuration
Requirements
• Switch zoning or controller level SSP must be used to ensure each single path HBA has an
exclusive path to its LUNs.
• Single path HBA server can be in the same fabric as servers with multiple HBAs.
• Single path HBA server cannot share LUNs with any other HBAs.
HBA configuration
• Hosts 1 and 2 are single path HBA hosts.
• Host 3 is a multiple HBA host with multi-pathing software.
See Figure 52 (page 156).
NOTE: Single path HBA servers running the Windows Server 2003 (x64) operating system will
support multiple single path HBAs in the same server. This is accomplished through a combination
of switch zoning and controller level SSP. Any single path HBA server will support up to four single
path HBAs.
Risks
• Single path failure will result in loss of connection with the storage system.
• Single path failure may cause the server to reboot.
• Controller shutdown puts controller in a failed state that results in loss of data accessibility
and loss of host data that has not been written to storage.
NOTE: For additional risks, see Table 58 (page 164).
Limitations
• HP Continuous Access EVA is not supported with single path configurations.
• Single path HBA server is not part of a cluster.
• Booting from the SAN is not supported on single path HBA servers.
Supported configurations 155
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