Class 1 – Quick Erase is the most time-saving method to erase all the physical blocks when there is not enough time for a thorough deletion of the whole drive. Quick Erase eliminates the FAT table and the MBR (Master Boot Record) in LBA which manages partition tables and the boot sector during system start-up process. With the MBR and FAT table erased, the drive would appear as uninitialized and mapping links between LBA and physical blocks are erased. In order to access the drive, re-initialization and FAT table rebuild are necessary.