PERC 5 Features 21RAID Configuration InformationTable 2-2 lists the configuration features for the PERC 5 controllers.Fault Tolerance FeaturesTable 2-3 lists the features that provide fault tolerance to prevent data loss in case of a failed physical disk.Table 2-2. Features for RAID ConfigurationSpecification PERC 5/E Adapter PERC 5/i Adapter and 5/i IntegratedNumber of virtual diskssupportedUp to 64 virtual disks per controller Up to 64 virtual disks per controllerNOTE: The number of physical disks on acontroller is limited by the backplane on whichthe card is attached.Online RAID level migration Yes YesDisk roaming Yes YesNo reboot necessary aftercapacity expansionYes YesUser-specified rebuild rate Yes YesTable 2-3. Fault Tolerance FeaturesSpecification FeatureSupport for SMART YesSupport for Patrol Read YesPhysical disk failure detection AutomaticPhysical disk rebuild using hot spares AutomaticParity generation and checking (RAID 5 only) YesBattery backup for controller cache to protect configuration data YesaHot-swap manual replacement of a physical disk unit without bringing the system down Yesa The PERC 5/i Adapter supports a battery backup unit (BBU) on selected systems only. For additional information,see documentation that was shipped with the system.Dell_PERC5_UG.book Page 21 Tuesday, February 13, 2007 6:02 PM
