Specifications

DS300f G2 Series User Manual
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3. Click the Settings button.
4. Click the Logical Drive Initialization Rate drop-down menu and choose a rate:
• Low
–FewersystemresourcestoInitialization,moretodataread/writeoperations.
• Medium–BalancessystemresourcesbetweenInitializationanddataread/writeoperations.
• High–MoresystemresourcestoInitialization,fewertodataread/writeoperations.
5. Click the Conrm button.
rebuIlD
When you rebuildadiskarray,youareactuallyrebuildingthedataononephysicaldrive.
• Whenaphysicaldriveinadiskarrayfailsandasparedriveofadequatecapacityisavailable,thediskarray
begins to rebuild automatically using the spare drive.
• Ifthereisnosparedriveofadequatecapacity,buttheAutoRebuildfunctionisENABLED,thediskarray
beginstorebuildautomaticallyassoonasyouremovethefailedphysicaldriveandinstallanuncongured
physical drive in the same slot. See "Making Rebuild Settings" on page 76.
• IfthereisnosparedriveofadequatecapacityandtheAutoRebuildfunctionisDISABLED,youmustreplace
thefaileddrivewithanunconguredphysicaldrive,thenperformaManual Rebuild.
See "Rebuilding a Disk Array" on page 95 and "Spare Drives" on page <?>.
Also see "Disk Array Degraded / Logical Drive Critical" on page <?> and "Disk Array Ofine/Logical Drive
Ofine"onpage<?>.
MAking rebuild settings
1. Click the Administration tab.
2. Click the Background Activities icon.
The list of background activities appears.
3. Click the Settings button.
4. Click the Rebuild Rate drop-down menu and choose a rate:
• Low
–FewersystemresourcestotheRebuild,moretodataread/writeoperations.
• Medium–BalancessystemresourcesbetweentheRebuildanddataread/writeoperations.
• High–MoresystemresourcestotheRebuild,fewertodataread/writeoperations.
5. Check the Enable Auto Rebuild box to enable Auto Rebuild (rebuilds when you swap out the failed drive
with a new one).
6. Click the Conrm button.
mIGratIon
Theterm“Migration”meanseitherorbothofthefollowing:
• Change the RAID level of a logical drive.
• Expand the storage capacity of a logical drive.
See “MigratingaLogicalDrive’sRAIDLevel”onpage169 and "RAID Level Migration" on page <?>.
MAking MigrAtion settings
To make migration settings:
1. Click the Administration tab.
2. Click the Background Activities icon.
The list of background activities appears.
3. Click the Settings button.
4. Click the Migration Rate drop-down menu and choose a rate:
• Low
–FewersystemresourcestoMigration,moretodataread/writeoperations.
• Medium–BalancessystemresourcesbetweenMigrationanddataread/writeoperations.
• High–MoresystemresourcestoMigration,fewertodataread/writeoperations.
5. Click the Conrm button.
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 94 and "PDM" on page <?>.
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.