Soft Bad Block Management (SBBM)
During a rebuild, if the MegaRAID BIOS Configuration Utility detects a media error on the source drive during rebuild, it initiates a sector read for that block. If the sector read fails, the MegaRAID BIOS Configuration Utility adds entries to the Soft Bad Block Management (SBBM) table, writes this table to the target drive, and displays an error message. Additional error messages are displayed if the SBBM table is 80% full or 100% full. If the SBBM table is completely full, the rebuild operation is aborted, and the drive is marked as FAIL.