What happens if you have a hard disk which spins erratically, or the heads are making clicking noises, or maybe everything seems fine but the disk is just not recognized by the PC or any other tool? Since you don't have access to the disk to recover data you may conclude that it is due to the controller board failure or some mechanical or physical damage, and whatever you try to do to recover data is then driven simply by your intuition because you have no information about the status of a drive that is simply not recognized by your utilities. But help is at hand, because the PC3000 UDMA is a unique data recovery tool that can communicate with the drive in such situations by using vendor specific commands to switch the drive into kernel mode - the one that is used by the manufacturer to provide read/write access to the firmware on the controller board and firmware modules, such as Microcode Overlays, HDD Configuration Tables, Defects Tables, SMART Attributes, Security Subsystem, Adaptives, etc., stored at the disk system area (negative cylinders.) For more information about data recovery products visit www.deepspar.com or  www.acelaboratory.com. PC3000 Sales Channels North America DeepSpar, ACE Data Recovery Engineering Inc, Canada Tel: +1.613.225.6771 Fax: +1.613.225.7766 E-mail: info@deepspar.com Web: http://www.deepspar.com Europe ACE Laboratory, Russia Tel/Fax: +7.863.278.5030, +7.863.278.5040 E-mail: info@acelaboratory.com Web: http://www.acelaboratory.com PC3000 and Data Extractor are registered trademarks of ACE Laboratory, Russia.