IBM 8479 User Reference - Page 76

Table 9. Video connector pin-number assignments. Pin 3 Blue Signal 4 Not connected 5 Ground Pin Signal 8 Ground 9 +5 V dc DDC 10 Ground Pin Signal 13 Horizontal synchronization (Hsync) 14 Vertical synchronization (Vsync) 15 DDC SCL Ultra160 SCSI connector (some models) Some xSeries 200 server models come with a SCSI adapter, which supports a single Ultra160 SCSI channel in a full-featured PCI 2.1-/2.2-compliant bus master package. This configuration supports a zero wait state, 32-bit memory transfers at 160 MB per second, when low voltage differential (LVD) SCSI peripherals are attached. This channel supports up to 15 SCSI devices. In addition, the SCSI adapter uses: • Double-transition clocking to achieve high transfer rates • Domain name validation to negotiate compatible data transfer speeds with each device • Cyclic-redundancy checking, instead of the usual parity checking, to significantly improve data reliability Note: If you install a RAID adapter, you can move the SCSI signal cable from the SCSI connector on the SCSI adapter to an internal channel connector on the RAID adapter to control the internal drives from the RAID adapter. SCSI cabling requirements You can install five internal SCSI devices using the SCSI signal cable that comes with your server or purchased separately, depending on your server model. If you plan to attach external SCSI devices, you must install an optional SCSI PCI adapter and order additional SCSI cables. To select and order the correct cables for use with external devices, contact your IBM reseller or IBM marketing representative. For information about the maximum length of a SCSI cable between the terminated ends of the cable, refer to the American National Standards Institute (ANSI) SCSI standards. Adhering to these standards will help ensure that your server operates correctly. Setting SCSI IDs Each SCSI device connected to a SCSI controller must have a unique SCSI ID. This ID enables the SCSI controller to identify the device and ensure that different devices on the same SCSI channel do not attempt to transfer data simultaneously. SCSI devices that are connected to different SCSI channels can have duplicate SCSI IDs. To install external SCSI devices, you must first install an optional SCSI PCI adapter. Refer to the information that is provided with the device for instructions to set its SCSI ID. If a SCSI adapter is installed in your server, you can use its 68-pin SCSI connector to connect different types of SCSI devices. The following table shows the pin-number assignments for the SCSI connector. 34 1 68 35 62 IBM xSeries 200: User's Reference