User manual MAXTOR HAWK 2LP INSTALLATION REV A 09-1994

[. . . ] HAWK 2LP Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (Wide bus) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST32430W/WD/WC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST31230W/WD/WC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] See figure below. J1 J1-Auxiliary 68 Pin SCSI I/O Connector 4P 3P 2P 1P J1-DC Power Connector Pin 1P 2P 3P 4P Power +12V +12V ret + 5V ret + 5V Figure 1. DC power connection, 68 pin SCSI I/O connector Hawk 2LP "WC" and "DC" model drives receive power from the host computer through the 80 pin combined SCSI I/O and power connector. No separate DC power connector is provided on the "WC" and "DC" drives (See Figure 2b). 18 Hawk 2LP (Wide) Installation Guide, Rev. A SCSI address selection On "W" and "WD" model drives, make sure that the SCSI bus address jumper(s) are properly set for the bus address assigned to the drive. See Figures 3a and 3b showing the bus address select header and the jumper configurations that select addresses 0 through 15. ID7 has the highest priority during bus arbitration (on both 8 and 16 device systems). Bus arbitration priority decreases to ID0, then ID15 down to ID8. Typically the primary boot device is set to ID 0, the host is ID7 and the subsequent SCSI drives are jumpered as appropriate for the particular system involved. If the drive "Busy" LED shows no on/off activity when the host is trying to communicate with it, an incorrect bus address selection at the drive should be suspected. On "WC" and "DC" model drives the SCSI ID can be and presumably will be, set over the 80 pin interface by the host computer. Unless directed to do so by the system documentation, no jumpers should be installed for address selection. On "WC" and "DC" model drives, the host system also has complete control over motor start functions, so no Motor Start or Delayed Motor Start Jumpers should be installed. Hawk 2LP (Wide) Installation Guide, Rev. A Terminator resistor packs 19 As a factory installed option, Hawk 2LP family model "W" drives can have terminator resistor packs that are permanently installed, but can be enabled or disabled by jumper plug. If you are installing a single drive, the terminator resistor packs must remain enabled. If you are installing multiple hard disc drives, disable the termination resistor packs from all the drives but the one connected to the end of the SCSI I/O cable. Model numbers that end in "WD" and "DC" have differential I/O circuits. These drives and "WC" model drives have no provisions for terminators on the drive PCB. The system manufacturer must provide some external means of I/O line termination. The Hawk 2LP family "W/WD" model drives can provide power for external terminators if the TP jumper is installed on the last position on the right end of J2. Do not mix "W" and "WD" or "WC" and "DC" model drives on the same I/O bus. 20 Hawk 2LP (Wide) Installation Guide, Rev. A Read/Write head auto-park Seagate disc drives described herein park the heads automatically at power off. This feature requires no operator intervention. [. . . ] Max screw length into side of drive 0. 15 in. Screw tightening torque 6. 0 in-lb (. 675 NM) max with minimum thread engagement of 0. 12 in. [2] Mounting holes four on bottom, 6-32 UNC. Max screw length into bottom of drive 0. 20 in. [. . . ]