Dell PowerEdge H730P User Manual

Contents

BGI, which takes a longer time to complete. To perform a fast initialization using the BIOS ConfigurationUtility, see Initializing Virtual Disks.NOTE: Fast initialization does not support RAID 6 and RAID 60 virtual disks with the PI featureenabled.Background InitializationBackground Initialization (BGI) is an automated process that writes the parity or mirror data on newlycreated virtual disks. BGI does not run on RAID 0 virtual disks. You can control the BGI rate in the DellOpenManage storage management application. Any change in the BGI rate does not take effect until thenext BGI run.NOTE: BGI will run on RAID 0 virtual disks only with PI enabled.NOTE: You cannot disable BGI permanently. If you cancel BGI, it automatically restarts within fiveminutes. For information on stopping BGI, see Stopping Background Initialization.NOTE: Unlike full or fast initialization of virtual disks, background initialization does not clear datafrom the physical disks.NOTE: Consistency Check (CC)/BGI typically causes some loss in performance until the operationcompletes.NOTE: VD with PI will have a longer background initialization when compared to non-PI virtualdisks.Consistency Check (CC) and BGI perform similar functions in that they both correct parity errors.However, CC reports data inconsistencies through an event notification, but BGI does not. You can startCC manually, but not BGI.Consistency ChecksConsistency Check (CC) is a background operation that verifies and corrects the mirror or parity data forfault tolerant virtual disks. It is recommended that you periodically run a consistency check on virtualdisks.You can manually start a CC using the BIOS Configuration Utility or the Dell OpenManage storagemanagement application. You can schedule a CC to run on virtual disks using the Dell OpenManagestorage management application. To start a CC using the BIOS Configuration Utility, see Checking DataConsistency .NOTE: CC/BGI typically causes some loss in performance until the operation completes.Consistency Check (CC) and BGI both correct parity errors. However, CC reports data inconsistenciesthrough an event notification, but BGI does not. You can start CC manually, but not BGI.Disk RoamingDisk roaming is moving the physical disks from one cable connection or backplane slot to another on thesame controller. The controller automatically recognizes the relocated physical disks and logically placesthem in the virtual disks that are part of the disk group. You can perform disk roaming only when thesystem is turned off.18