Release Notes

Linux setup and configuration
22 Dell EMC PowerVault ME4 Series and Linux | 3924-BP-L
2. Execute the CLI command to show the volume information. The following example shows volumes
that match the pattern r730xd-1-* and only display the non-snapshot volumes. The details argument
includes extended attributes including the WWN of the volumes.
# show volumes details type base pattern r730xd-1-*
Pool Name Total Size Alloc Size Class Serial Number
WR Policy Cache Opt Read Ahead Type Tier Affinity
Snap-Pool Desc WWN
Large Virtual Extents Role Health Reason Action
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A r730xd-1-vol0001 200.0GiB 176.0MiB Virtual
00c0ff3c589f00001e4b6b5b01000000 write-back standard Adaptive base No
Affinity medium
600C0FF0003C589F1E4B6B5B01000000
Disabled OK
A r730xd-1-vol0002 150.0GiB 124.0MiB Virtual
00c0ff3c589f000097596b5b01000000 write-back standard Adaptive base No
Affinity medium
600C0FF0003C589F97596B5B01000000
Disabled OK
A r730xd-1-vol0003 150.0GiB 52.0MiB Virtual
00c0ff3c589f000098596b5b01000000 write-back standard Adaptive base No
Affinity medium
600C0FF0003C589F98596B5B01000000
Disabled OK
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3.2 Multipathing
Multipathing is a software solution implemented at the host operating-system level. While multipathing is
optional, it provides path redundancy, failover, and performance-enhancing capabilities. Therefore, it is highly
recommended to deploy the solution in a production environment or any environments where availability and
performance are critical.
The main benefits of using an MPIO solution include the following:
• Increase server availability by providing automatic path failover and failback
• Enhance I/O performance by providing automatic load balancing and capabilities for multiple parallel
I/O paths
• Ease administration by providing persistent user-friendly names for the storage devices across cluster
nodes
3.2.1 Native Linux multipath (device-mapper-multipath)
The native Linux multipath solution is supported and bundled with most popular Linux distributions in use
today. Because the software is widely and readily available at no additional cost, many administrators prefer
using it compared to other third-party solutions.