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Dell PowerEdge RAID Controller 10 User’s Guide PERC H345, H740P, H745, and H840 Series Controllers

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Background initialization

Background initialization (BGI) is an automated process that writes parity or mirror data on newly created virtual disks. BGI does not run on RAID 0 virtual disks. You can control the BGI rate in the Dell OpenManage storage management application. Any change to the BGI rate does not take effect until the next BGI is executed.
NOTE:
  • On PERC H345, background operations will not run until the operating system boots.
  • You cannot disable BGI permanently. If you cancel BGI, it automatically restarts within five minutes.
  • Unlike full or fast initialization of virtual disks, background initialization does not clear data from the physical disks.
  • Consistency Check (CC) and BGI typically cause some loss in performance until the operation completes.

Consistency check and BGI perform similar functions in that they both correct parity errors. However, CC reports data inconsistencies through an event notification, while BGI does not. You can start CC manually, but not BGI.

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