Setting The Multipathing Policy; Specifying Diskmaxlun - HP StorageWorks 4400 Installation Manual

3. Follow the instructions in the readme file to load the NVRAM configuration onto each FCA.
• If you have a blade server other than a ProLiant blade server:
1. Download the supported FCA BIOS update, available on
downloads.
2. Unzip the file.
3. Follow the instructions in the readme file to load the NVRAM configuration onto each FCA.

Setting the multipathing policy

You can set the multipathing policy for each logical unit number (LUN) or logical drive on the storage
area network (SAN) to one of the following:
• Most recently used (MRU)
• Fixed
• Preferred
ESX 2.5.x commands
The # vmkmultipath –s vmhba0:0:1 –p mru command sets vmhba0:0:1 with an MRU
multipathing policy for all LUNs on the SAN.
The # vmkmultipath -s vmhba1:0:1 -p fixed command sets vmhba1:0:1 with a Fixed
multipathing policy.
The # vmkmultipath -s vmhba1:0:1 -r vmhba2:0:1 -e vmhba2:0:1 command sets and
enables vmhba2:0:1 with a Preferred multipathing policy.
ESX 3.x commands
The # esxcfg-mpath --policy=mru --lun=vmhba0:0:1 command sets vmhba0:0:1 with
an MRU multipathing policy.
The # esxcfg-mpath --policy=fixed --lun=vmhba0:0:1 command sets vmhba1:0:1
with a Fixed multipathing policy.
The # esxcfg-mpath --preferred --path=vmhba2:0:1 --lun=vmhba2:0:1 command
sets vmhba2:0:1 with a Preferred multipathing policy.
NOTE:
Each LUN can be accessed through both EVA storage controllers at the same time; however, each
LUN path is optimized through one controller. To optimize performance, if the LUN multipathing
policy is Fixed, all servers must use a path to the same controller.
You can also set the multipathing policy from the VMware Management User Interface (MUI) by
clicking the Failover Paths tab in the Storage Management section and then selecting Edit... link for
each LUN whose policy you want to modify.

Specifying DiskMaxLUN

The DiskMaxLUN setting specifies the highest-numbered LUN that can be scanned by the ESX server.
• For ESX 2.5.x, the default value is 8. If more than eight LUNs are presented, you must change the
setting to an appropriate value. To set DiskMaxLUN, select Options> Advanced Settings in the
MUI, and then enter the highest-numbered LUN.
76 Configuring non-Windows application servers
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