The Raw Device Mappings view provides a method to map the selected virtual machine's RDM to their underlying storage, as shown in Figure 17. This view includes two panes, the Raw Device Mappings list and the Storage Details list.
The Raw Device Mappings pane lists the devices that have been configured for the virtual machine. Click Refresh to refresh the information. The total number of raw device
mappings configured on the virtual machine is listed in Total RDMs. If there are no RDMs, Total RDMs reports 0 and the list is empty.
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To map devices to the underlying storage devices:
1. Select Raw Device Mappings in the Features pane.
2. Select the device in the Raw Device Mappings list to display the selected RDM details.
3. Click Common, Storage Pools, or Paths to change the view in the Storage Details pane.
Figure 17 Virtual Machine level Raw Device Mappings subview
The information presented in the Raw Device Mappings pane is organized into the following columns:
◆ Name—Shows the name of the RDM.
◆ ID—Shows the ID of the selected virtual disk.
◆ Size—Shows the capacity of the RDM, which is equivalent to the size to which the storage device that the RDM points.
◆ LUN Identifier—Shows the LUN identifier (WWN) of the storage device to which the RDM points. When an RDM is selected, there is also a VPLEX detailed view, the same as with virtual disks. For Symmetrix devices, if SPC-2 emulation is enabled after the creation of the RDM, the LUN identifier changes, negatively impacting the RDM mapping files. The Enabling SPC-2 Compliancy on EMC Symmetrix DMX Devices Connected to VMware VI3 Environments White Paper, available on the EMC Online Support website, provides information on the SPC-2 flag and its effect on VMware environments.
◆ Filename—Shows the full path to the virtual disk file that defines the RDM. The datastore name where the RDM file is stored is shown in square brackets.
◆ Compatibility—Shows whether the RDM is configured in a physical or a virtual-compatibility mode.
Using VSI
Common view
The Common view lists the information about the storage device to which the selected RDM points. This list remains empty until an RDM is selected, and it returns to empty if the selection is removed from the Raw Device Mappings list or if the Refresh button is clicked.
In addition, the Total LUNs label shows the total number of LUNs listed in this pane. This label should be empty when no virtual disk is selected, and should show 1 when an RDM is selected. The information presented for RDM in the Common view is organized into the following columns:
◆ Runtime Name—Shows the runtime name of the device hosting the datastore. This value can be used when trying to cross-reference LUNs from this pane and other VMware panes, such as that when creating a new datastore.
◆ Product—Shows the model of underlying storage, such as Symmetrix or CLARiiON.
◆ Model—Shows the model of the underlying storage, such as DMX-3, VMAX-1 SE, or CX3-80.
◆ Revision—Shows the revision level returned by the device in response to the SCSI inquiry data command. For Symmetrix LUNs, it is the Enginuity level. For CLARiiON LUNs, it is the FLARE level. For VPLEX LUNs, it is the base version of GeoSynchrony that is running on the VPLEX system.
◆ Array—Shows the serial number of the array on which the LUN resides. If a friendly name is configured for the array, it appears in place of the serial number. For a VPLEX system, this is the TLA name.
◆ Device Name—Shows either the Symmetrix device number or the CLARiiON device number for the LUN. If a friendly name is configured for the device, it appears in place of the device number.
◆ Virtual Volume Name—Shows the name of the virtual volume within the VPLEX system.
◆ Device ID—Shows either the Symmetrix device number or the CLARiiON device number for the LUN.
◆ Type—Shows any special attributes of the device such as BCV, VDEV, or R1.
◆ RAID—Shows the RAID protection type for the LUN.
◆ Capacity—Shows the total capacity of the LUN.
◆ Locality—Identifies where the virtual volume resides in the VPLEX system, relative to the local and remote clusters. Possible values are: Distributed, Local, and Remote.
◆ Visibility—Identifies where the virtual volume can be viewed within the VPLEX system, relative to local and remote clusters. Possible values are: Global, Local, and Remote.
◆ Storage Group—Shows the CLARiiON or Symmetrix storage group to which the LUN is assigned.
◆ Rule Set—Identifies the name of the rule set that is currently active for the virtual volume. The rule set determines the actions of the VPLEX system if a split-brain scenario is encountered for this virtual volume.
◆ META—Indicates whether the LUN is a metavolume. If it is, then this field indicates the type, such as concatenated or striped. This column is not shown by default.
Right-click the column headers to add it.
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◆ Pool—Indicates the name of the thin pool if the LUN is virtually provisioned.
◆ FAST VP Policy—Indicates the name of the FAST VP policy if the LUN is associated with one.
◆ Paths—Shows the number of paths from the ESX/ESXi host to the LUN. At least one path should be available at any given time; therefore, this value should always be greater than zero. When PowerPath/VE is installed on the ESX/ESXi host, the active paths are shown in relation to the total paths, such as 4/4 or 2/4.
◆ Owner—Shows the multipath entity that owns this particular LUN. For example, NMP is VMware's Native Multipathing Plug-in, and is shown as the default owner. When PowerPath/VE is installed on the ESX/ESXi host, the owner appears as PowerPath.
◆ Policy—Shows the multipath policy that is currently set for the LUN. Some possible policy values for PowerPath owned LUNs are CLAROpt, SymmOpt, and RoundRobin.
◆ Used by—Indicates whether a LUN is used by a datastore or as an RDM to a virtual machine. For RDM, displays the name of the datastore or virtual machine that is using the LUN as an RDM.
◆ Storage Type—Shows the name (label) assigned to the Storage Type.
Storage Pools view
“Storage Pools view” on page 31 provides more information.
Paths view
The Paths view contains multipath information for PowerPath and NMP, depending on which type of multipathing is used. “Paths view” on page 32 provides more information.
Performance monitoring
The Storage Viewer feature provides performance information for datastores and virtual disks, as well as raw device mappings. “Performance monitoring” on page 54 provides more details about performance monitoring.
Using VSI