User manual MAXTOR HAWK 1LP INSTALLATION REV B 5-1994

[. . . ] HAWK 1LP Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (Wide bus) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST31200W/WD/WC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Electromagnetic interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] System connection for "WC" models is via an 80 pin SCSI and DC power connector. The "WC" model plugs directly into a PCB or bulkhead mounted mating 80 pin connector. Some cables have a contrasting color stripe on one edge to indicate pin 1. On the Hawk 1LP wide drives the I/O connector is keyed by virtue of its shape. There is only one way it can mate with the mating input connector. Strain relief is recommended at the cable in drives using cables. Do not block system cooling air flow in routing of cables. Hawk 1LP (Wide) Installation Guide, Rev. B DC Power connection 17 Hawk 1LP family "W/WD" model drives receive DC power through a 4 pin connector mounted on the PCB in line with the SCSI I/O connector. 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 1LP "WC" 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 drive (See Figure 2b). 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. Typically the primary boot device is set to ID 0, and the subsequent SCSI drives are jumpered in ascending 18 Hawk 1LP (Wide) Installation Guide, Rev. Bus addresses 0 through 14 should be used (the host adapter usually uses address 15). 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" 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" 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. Terminator resistor packs As a factory installed option, Hawk 1LP 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. Hawk 1LP (Wide) Installation Guide, Rev. B 19 On "WC" 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" 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 1LP family "W" model drives have terminator resistor packs that are permanently installed, but can be enabled or disabled by jumper plug. [. . . ] 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. [. . . ]