Use the esxcli command to list available multipathing claim rules.
Claim rules indicate which multipathing plug-in, the NMP or any third-party MPP, manages a given physical path. Each claim rule identifies a set of paths based on the following parameters:
Transportation, such as SATA, IDE, Fibre Channel, and so on
Adapter, target, or LUN location
Device driver, for example, Mega-RAID
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.
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.
Sample Output of the esxcli storage core claimrule list Command
Rule Class Rule Class Type Plugin Matches MP 0 runtime transport NMP transport=usb MP 1 runtime transport NMP transport=sata MP 2 runtime transport NMP transport=ide MP 3 runtime transport NMP transport=block MP 4 runtime transport NMP transport=unknown MP 101 runtime vendor MASK_PATH vendor=DELL model=Universal Xport MP 101 file vendor MASK_PATH vendor=DELL model=Universal Xport MP 200 runtime vendor MPP_1 vendor=NewVend model=* MP 200 file vendor MPP_1 vendor=NewVend model=* MP 201 runtime location MPP_2 adapter=vmhba41 channel=* target=* lun=* MP 201 file location MPP_2 adapter=vmhba41 channel=* target=* lun=* MP 202 runtime driver MPP_3 driver=megaraid MP 202 file driver MPP_3 driver=megaraid MP 65535 runtime vendor NMP vendor=* model=*
This example indicates the following:
The NMP claims all paths connected to storage devices that use the USB, SATA, IDE, and Block SCSI transportation.
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.
The MPP_1 module claims all paths connected to any model of the NewVend storage array.
The MPP_3 module claims the paths to storage devices controlled by the Mega-RAID device driver.
Any paths not described in the previous rules are claimed by NMP.
The Rule Class column in the output describes the category of a claim rule. It can be MP (multipathing plug-in), Filter, or VAAI.
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.