User manual MAXTOR ST34502 INSTALLATION

[. . . ] ·· · ·· · · ·· · · ·· · · ·· · ·· · · ·· · · Cheetah 9LP ·· · ·· · · ·· · · ·· · · ·· · ·· · · ·· · · Disc Drive ·· · ·· · · ·· · · ·· · · ·· · ·· · · ·· · · ST39102LW/LC ·· · ·· · · ·· · · ·· · · ·· · ·· · · ·· · · ST34502LW/LC ·· · ·· · · ·· · · ·· · · ·· · ·· · · ·· · · Installation Guide ·· · ·· · · ·· · · ·· · · ·· · ·· · · ·· · · Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Electrostatic discharge protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Important safety information and precautions . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Wichtige Sicherheitshinweise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] B 21 SCSI IDs are normally used for other SCSI devices such as this Cheetah disc drive. Other controllers do not allow this so be sure to refer to your system or controller user's manual for details about its requirements for proper SCSI device installation. If the system into which you are installing this drive requires SCAM compliant drives, you do not need to be concerned about the drive ID jumper settings, as the system automatically assigns your new drive the ID it wants it to have. Setting the drive ID doesn't hurt anything, but is not necessary in a SCAM compliant system. To change the SCSI ID, refer to the appropriate drive section for your model. If, after completing the installation process, the drive's LED does not show on/off activity when the host is trying to communicate with the drive, a duplicate SCSI ID may be the problem. If this is the case, change the ID so that each device on the SCSI chain has its own unique ID. Also check your system or controller user's manual to ensure that you have not violated its SCSI ID numbering recommendations. 22 Cheetah 9LP Installation Guide, Rev. B Drive termination If you are installing a Cheetah drive in a system that has other SCSI devices installed, terminate only the end devices on the SCSI chain. A SCSI "device" is any disc drive, scanner, tape backup unit, or other piece of hardware connected to your system using the SCSI bus. Use active (ANSI SCSI-2 Alternative 2) single-ended terminators when terminating a bus operating in singleended mode. Use SPI-2-compliant active low voltage differential terminators when terminating a SCSI Ultra2 bus operating in LVD mode. The top example in Figure 2 shows an internal hard disc at one end of the SCSI bus with the SCSI controller at the other end (both are terminated). The bottom example shows two additional SCSI devices connected externally--this means the SCSI controller is no longer on the end of the SCSI chain and should not be terminated. Some controllers prefer to remain terminated even if they are in the middle of the chain. Also, some controllers treat the internal and external chains as separate logical buses. This means you may need to terminate both the first and last devices on both logical buses to achieve proper termination. If necessary, refer to your system or controller documentation to see how this is handled in your particular system. These drives do not have on-board terminators, so you must terminate external to the drive when termination is required. For ST39102LC and ST34502LC drives, this is normally accom- Cheetah 9LP Installation Guide, Rev. For ST39102LW and ST34502LW drives, use an in-line terminator on the cable. Internal SCSI cable Internal SCSI device Internal SCSI device Terminate Internal SCSI cable Internal SCSI device Internal SCSI device Controller External SCSI cable Controller External SCSI device External SCSI device Terminate Figure 2. SCSI bus termination Terminator power You usually will not need to change this option and can normally leave the drive configured as it was shipped from the factory. For information about how to change the terminator power option on your drive, refer to the appropriate drive-specific section. I/O circuits and data path widths · These drives can be used in single-ended or low voltage differential interface systems; however, do not attempt to mix these drives on the same daisy chain with high voltage differential devices. [. . . ] Write Protect option Write protect = Off (enables writing ­ default). Disable parity check. J2 J6 Drive Front J2 Jumper (enlarged to show detail) Figure 13. Additional jumper options 44 Cheetah 9LP Installation Guide, Rev. B LW drives 68 Pin SCSI I/O Connector J1 Pin 1 J5/J1A [2][4] Pin 1 4P 3P 2P 1P Pin 12 J1A Pin 1 SCSI Address A0 SCSI Address A1 SCSI Address A2 SCSI Address A3 No connection +5V Fault LED* Vendor Unique* Reserved Activity LED* Ground * These pins are driven low for 250 ms after PWR ON or RESET to allow jumper selectable SCSI ID as shown to the right. J1-DC Power SCSI ID = 0 SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 SCSI ID = 7 SCSI ID = 8 SCSI ID = 9 SCSI ID = 10 SCSI ID = 11 SCSI ID = 12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15 Figure 14. [. . . ]