HP 3000 Manuals HP 3000 Manuals
Selecting I/O Paths An I/O path is determined by the channel adapter (CA) module number, the device adapter (DA) slot number, and the device address. Series 922 through Series 949 systems Each I/O path is constructed "top down." On the HP 3000 Series 922 through Series 949 systems, I/O path construction begins with the channel adapter, which connects the system central bus and the channel I/O (CIO) bus. The logical construction concludes with the device adapter, which connects the CIO bus and I/O device. An I/O device connects to a device adapter card through an interface cable.
NOTE The examples used to demonstrate the procedures in this chapter were created using a Series 925 system, unless otherwise specified. Your system may produce slightly different information.
An HP 3000 Series 925 through Series 949 I/O path is specified as follows: CA Module Number.DA Slot Number.Device Address The CA module specifies the number of the interface slots that contain the two adapter boards for the channel I/O bus (CIO) and central bus (CTB). The interface slot is assigned a numerical value of 4 or 8 for a 949 (device adapters in SPU) or 8 (device adapters in Series 925 CIO expander) or 36 or 40 for a 949 (device adapters in Series 935 CIO expander). DA CIO section slot numbers range from 0 to 13. It is recommended you use slots 0 through 7. The address of the device itself depends on the adapter. In addition, a data communications device can have an additional logical or virtual device number in the I/O path specification. For example, if the CA module number is 4, the HP-IB channel CIO interface slot is 5, and the magnetic tape device address is 0, the I/O path for the tape device is 4.5.0. Series 950 through Series 980 systems On the HP 3000 Series 950 through 980 systems, I/O path construction begins with the bus converter (BUS CONV), which connects the system memory bus (SMB) and the system mid-bus. The channel adapter connects the mid-bus and the CIO bus. The logical construction concludes with the device adapter, which connects the I/O device to the CIO bus. An I/O device connects to a device adapter card through an interface cable.
NOTE Since Series 950 through Series 980 systems have basically the same configuration, the examples used to demonstrate the procedures in this chapter are combined, unless otherwise specified.
An HP 3000 Series 950 through Series 980 I/O path is specified as follows: BUS CONV/CA Module Number.DA Slot Number.Device Address F The bus converter specifies the number, either 2 or 6, of the interface slot which contains the adapter boards for the SMB and the mid-bus. The CA module specifies the number of the interface slots that contain the adapter boards for the mid-bus and the CIO bus. The interface slot is assigned a numerical value of 4, 8, 16, 20, or 24. DA CIO section slot numbers range from 0 to 4. The address of the device itself depends on the adapter. In addition, data communications devices may have an additional logical or virtual device number in the I/O path specification. For example, if a bus converter is 2, the CA module number is 4, the HP-IB channel CIO interface slot is 2, and the magnetic tape device address is 3, the I/O path for the tape device is 2/4.2.3. Series 9X8LS and 9X8RX Systems Series 9X8LX and 9X8RX systems use the HP Power Trust UPS monitor software with HP Model A2998A UPS hardware as a powerfail device. Refer to Appendix G for more information. Adapting systems for use with HP fiber optic link (HP-FL) and interface cards The HP 27115A Interface Card (HP-FL) is a device adapter printed circuit assembly designed for use with HP Precision Architecture computer systems that use channel input/output (CIO). The HP-FL card provides the computer system with a high-speed serial connection to peripherals over a fiber optic data link. Device-specific data is converted to a format compatible with the CIO bus. The high-speed data transfers of HP-FL cards require that HP-FL devices occupy the lowest-priority CIB slots; therefore, HP-IB systems may require reconfiguration to accommodate HP-FL cards. The reconfiguration also requires that the primary, secondary, and alternate boot paths be changed. Systems initially configured to accommodate HP-FL cards may not require significant modification to accept additional HP-FL cards. Appendix D lists the default I/O paths provided for use with HP-FL systems. Contact your HP representative for additional information on using HP-FL cards in your system.