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SCSI 3 (SC3) set enabled
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Unique world wide name (UWN)
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SPC-2 (Decal) (SPC2) SPC-2 flag is required
The ESX/ESXi host considers any LUNs from a Symmetrix storage array with a capacity of 50MB or less as
management LUNs. These LUNs are also known as pseudo or gatekeeper LUNs. These LUNs appear in the
EMC Symmetrix Management Interface and should not be used to hold data.
IBM System Storage DS4800 Storage Systems
IBM System Storage DS4800 systems used to be called IBM FAStT. A number of storage array vendors
(including LSI and StorageTek) make SAN storage arrays that are compatible with the DS4800.
For your host to work with IBM DS4800 and other compatible systems, make sure to set the multipathing policy
on your host to Most Recently Used or VMW_PSP_FIXED_AP.
Configuring the Hardware for SAN Failover with DS4800 Storage Servers
This topic provides information on how to set up a highly available SAN failover configuration with an ESX/
ESXi host and DS4800 storage.
You must have the following hardware components:
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Two FC HBAs, such as QLogic or Emulex, on each ESX/ESXi machine.
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Two FC switches connecting the HBAs to the SAN (for example, FC switch 1 and FC switch 2).
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Two SPs (for example, SP1 and SP2).
Each SP must have at least two ports connected to the SAN.
Use the following connection settings for the ESX/ESXi host, as shown in Figure 4-1:
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Connect each HBA on each ESX/ESXi machine to a separate switch. For example, connect HBA1 to FC
switch 1 and HBA2 to FC switch 2.
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On FC switch 1, connect SP1 to a lower switch port number than SP2, to ensure that SP1 is listed first. For
example, connect SP1 to FC switch 1 port 1 and SP2 to FC switch 1 port 2.
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On FC switch 2, connect SP1 to a lower switch port number than SP2, to ensure that SP1 is listed first. For
example, connect SP1 to port 1 on FC switch 2 and SP2 to port 2 on FC switch 2.
Figure 4-1. SAN Failover
storage
ESX/ESXi 1 ESX/ESXi 2
SP1 SP2
FC switch 2FC switch 1
HBA2HBA1 HBA4HBA3
Fibre Channel SAN Configuration Guide
36 VMware, Inc.