Promise Technology Vess A6120 - Pdm; Transition

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Managing with WebPAM PROeVess A6120 Product Manual
Note
Initializationofthelogicaldrivemustbecompletedbeforea
RedundancyCheckcanbepreformed.
Note
YoucanusetheschedulertosetupaRedundancyCheckSchedule.
Tosetupaschedule,clickthemenuexpandertotherightofthe
SchedulertabandselectRedundancy Check Schedule.
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.
PDM Settings
To change PDM setting the in Background Activities Settings menu:
1. 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.
2. 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.
3. Click the Submit button.
trAnsition
Transition is the process of replacing a revertible spare drive that is currently part of a disk array with an
uncongured physical drive or a non-revertible spare drive.
Transition Rate
To change Transition Rate setting the in Background Activities Settings menu:
1. Click the Transition Rate drop-down menu and choose a rate:
• Low–FewersystemresourcestoTransition,moretodataread/writeoperations.
• Medium–Balancessystemresourcesbetween
Transitionanddataread/writeoperations.
• High–MoresystemresourcestoTransition,fewertodataread/writeoperations.
2. Click the Conrm button.