User Manual

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Vess R2000 Series Product Manual Promise Technologies
pdM
PredictiveData Migration(PDM) is themigration of data from the suspect physical drive to a spare drive,
similar torebuildinga logical drive. But unlike Rebuilding, PDM constantly monitors your physicaldrives and
automatically copies your data to a spare drive before the physical drive fails and your logical drive goes Critical.
See “Running PDM on a Disk Array” on page 194 and “PDM” on page 550.
MAking PdM settings
To make PDM settings:
1. Click the Administration tab.
2. Click the Background Activities icon.
The list of background activities appears.
3. Click the Settings button.
4. Make the following settings are required:
• ClickthePDM Ratedrop-downmenuandchoosearate:
Low–FewersystemresourcestoPDM,moretodataread/writeoperations.
Medium–BalancessystemresourcesbetweenPDManddataread/write
operations.
High
–MoresystemresourcestoPDM,fewertodataread/writeoperations.
• Highlightthecurrentvaluesintheblockthresholdeldsandinputnewvalues.
Reassignedblockthresholdrangeis1to512blocks.
Errorblockthresholdrangeis1to2048blocks.
5. Click the Conrm button.