SDIAG is a simple and reliable SCSI diagnostic tool developed by Fujitsu verifying the condition of your Fujitsu SCSI Hard Disk Drive. A high percentage of Hard Drives returned to the manufacturer are actually diagnosed as No Trouble Found (NTF). There could be many circumstances that are causing the system to fail and invariably the hard drive is blamed. SDIAG can be employed without the disruptive removal of the drive from the system and its status ascertained saving both time and money.