Use the vSphere CLI to list all claim rules from 0 to 65535.

Claim rules indicate which multipathing plugin, 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:

Vendor/model strings

Transportation, such as SATA, IDE, Fibre Channel, and so on

Adapter, target, or LUN location

Device driver, for example, Mega-RAID

Use the esxcli corestorage claimrule list to list claim rules.

Example: Sample Output of the esxcli corestorage claimrule list Command shows the output of the command.

Rule  Class     Type        Plugin              Matches
0     runtime   transport   NMP                 transport=usb
1     runtime   transport   NMP                 transport=sata
2     runtime   transport   NMP                 transport=ide
3     runtime   transport   NMP                 transport=block
101   runtime   vendor      MASK_PATH           vendor=DELL model=Universal Xport
101   file      vendor      MASK_PATH           vendor=DELL model=Universal Xport
200   runtime   vendor      MPP_1               vendor=NewVend model=* 
200   file      vendor      MPP_1               vendor=NewVend model=* 
201   runtime   location    MPP_2               adapter=vmhba41 channel=* target=* lun=*
201   file      location    MPP_2               adapter=vmhba41 channel=* target=* lun=*
202   runtime   driver      MPP_3               driver=megaraid
202   file      driver      MPP_3               driver=megaraid
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.

The MASK_PATH module claims all paths returning SCSI inquiry data with a vendor string of DELL and a model string of Universal Xport. The MASK_PATH module is used to mask paths from your host.

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 Class column in the output 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.