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| Setting an SSD plex as a preferred plex to improve I/O performance | ||
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| Prev | Volume Manager space allocation is SSD aware | Next |
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| Setting an SSD plex as a preferred plex to improve I/O performance | ||
|---|---|---|
| Prev | Volume Manager space allocation is SSD aware | Next |
A volume may contain plexes from media types HDD and SSD.
The Read performance of an SSD plex is better than an HDD plex. Therefore, the SSD plex is set as the preferred plex with default Read policy based on the following conditions:
If you have already set a preferred plex then the above mentioned changes do not take place.
No SSD plex is set as a preferred plex if all plexes of a volume lie on SSD disks.
The preferred plex setting on an SSD plex can be controlled using the following registry value: SetPreferredPlexonSSD
Run the command Regedit to open the registry editor.
Locate the SetPreferredPlexonSSD in the registry under the following key:
HKEY_LOCAL_MACHINE\SOFTWARE\VERITAS\VxSvc\CurrentVersion\VolumeManager.
Automatic selection of an SSD plex as a preferred plex can be turned off by setting the above DWORD registry value to '0'.
If a non-empty disk is manually tagged, then the preferred plex settings of the existing volumes on that disk is not updated.