What you need
Most new SCSI hard drives are Ultra2/3 LVD (80 MB/s or 160 MB/s) capable. Low Voltage Differential (LVD) drives can operate in single-ended (SE) or LVD mode. This multimode capability provides backward compatibility so you can use it with or without an LVD-capable host adapter. The primary benefits of LVD include faster transfer rates, reduced power consumption, increased cable lengths, and improved device connectivity.
Set the SCSI ID
Each SCSI device must have a unique SCSI ID. Most Seagate SCSI drives come with no jumpers on SCSI ID (SCSI ID = 0). The SCSI host adapter usually uses SCSI ID = 7. If you are installing a drive model ending in LC (uses 80-pin SCA connector), the host normally sets the ID over the I/O interface.
Only the devices at each physical end of a SCSI bus need to be terminated. The SCSI host adapter normally will provide termination for the controller end, therefore only terminate the last drive on the end of the cable. LVD drives do not have any provision for onboard termination; therefore, termination for LVD drives must come from another device or from an external terminator. Use only active SE or LVD terminators.
Configure Terminator Power
Active terminators must receive power from some source. The default configuration results in the drive not supplying termination power to the bus. Usually, the host adapter provides term power. Check the user's manual for your host adapter. Drive models ending in LC cannot be configured to provide termination power to the bus.
Attach Cables and Mount the Drive:
Partition and Format the Drive
All Seagate SCSI drives are low level formatted at the factory and should not need to be low level formatted. If performing a low level format, take care not to interrupt the format to avoid damaging the drive. Most operating systems provide partitioning and high level formatting utilities (i.e. FDISK, FORMAT).
If the above steps do not solve the problem, contact your dealer, download SeaTools diagnostic tools, or contact Seagate Support.