vSphere Storage - ESXi 5.1 - Documentation - VMware

This example indicates the following:
n The NMP claims all paths connected to storage devices that use the USB, SATA, IDE, and Block SCSI
transportation.
n You can use the MASK_PATH module to hide unused devices from your host. By default, the PSA claim
rule 101 masks Dell array pseudo devices with a vendor string of DELL and a model string of Universal
Xport.
n The MPP_1 module claims all paths connected to any model of the NewVend storage array.
n The MPP_3 module claims the paths to storage devices controlled by the Mega-RAID device driver.
n Any paths not described in the previous rules are claimed by NMP.
n The Rule Class column in the output describes the category of a claim rule. It can be MP (multipathing
plug-in), Filter, or VAAI.
n The Class column shows which rules are defined and which are loaded. The file parameter in the Class
column indicates that the rule is defined. The runtime parameter indicates that the rule has been loaded
into your system. For a user-defined claim rule to be active, two lines with the same rule number should
exist, one line for the rule with the file parameter and another line with runtime. Several low numbered
rules, have only one line with the Class of runtime. These are system-defined claim rules that you cannot
modify.
Display Multipathing Modules
Use the esxcli command to list all multipathing modules loaded into the system. Multipathing modules
manage physical paths that connect your host with storage.
In the procedure, --server=server_name specifies the target server. The specified target server prompts you
for a user name and password. Other connection options, such as a configuration file or session file, are
supported. For a list of connection options, see Getting Started with vSphere Command-Line Interfaces.
Prerequisites
Install vCLI or deploy the vSphere Management Assistant (vMA) virtual machine. See Getting Started with
vSphere Command-Line Interfaces. For troubleshooting , run esxcli commands in the ESXi Shell.
Procedure
u To list multipathing modules, run the following command:
esxcli --server=server_name storage core plugin list --plugin-class=MP
This command typically shows the NMP and, if loaded, the MASK_PATH module. If any third-party MPPs
have been loaded, they are listed as well.
Display SATPs for the Host
Use the esxcli command to list VMware NMP SATPs loaded into the system. Display information about the
SATPs.
In the procedure, --server=server_name specifies the target server. The specified target server prompts you
for a user name and password. Other connection options, such as a configuration file or session file, are
supported. For a list of connection options, see Getting Started with vSphere Command-Line Interfaces.
Prerequisites
Chapter 20 Understanding Multipathing and Failover
Install vCLI or deploy the vSphere Management Assistant (vMA) virtual machine. See Getting Started with
vSphere Command-Line Interfaces. For troubleshooting , run esxcli commands in the ESXi Shell.
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