the model d20 provides additional pci-x slots and disk drive bays for the model 6c4.
1 seven hot-plug pci-x slots, 64-bit, 133 mhz, 3.3 volt
2 up to 12 hot-pluggable disk drive bays
the optional disk backplane consists of two 6-pack disk bays and requires scsi cables to connect a required ultra3 scsi pci adapter or ultra3 scsi raid adapter, in slot 7 to each of the 6-packs, or two
scsi adapters (one in slot 4 and one in slot 7 of the i/o drawer).
power supply
up to two power supplies maximum per system; the second power supply is for redundant power.
1 ac input type 120-127 v ac / 200-240 v ac
2 single phase
3 frequency = 47 hz - 63 hz
keyboard
1 standard: 101-key enhanced keyboard
2 101/102 or 106-key enhanced keyboard is also available
mouse
1 three-button
operator panel
1 32-character led diagnostics display
2 leds for power on, attention, scsi activity, and lan activity
3 buttons for power on and service processor reset
4 pinhole for system reset:
system reset
dumps aix (if dump is enabled) and reboots
service processor reset
resets the service processor (into standby mode). the service processor reset switch is the pinhole located on the operator panel above the system reset button.
input/output ports
1 one 25-pin parallel
2 keyboard
3 mouse
4 two ultra3 scsi (one to internal 4-pack disk drive backplane, one to external vhdci mini 68-pin port)
5 integrated drive electronics (ide)
6 two 10/100 ethernet (ieee 802.3 compliant)
7 three serial ports. serial port 1 (s1) has two physical connectors, one rj-48 connector located in front on the operator panel, and a 9-pin d-shell connector located on the rear of the chassis. the other two serial ports are 9-pin d-shell connectors and are located on the rear of the system chassis.
current usage for the serial port connectors is as follows:
1. serial port 1 is never used to run hacmp or attach a ups. if you are configuring your system to run hacmp with a ups attached, you must connect the hacmp cable to serial port 2 and the ups cable to serial port 3. do not run ups connected to serial port 2. if you disconnect hacmp, you mustreset the service processor using the pinhole reset switch before running another application. the service processor pinhole reset switch is located on the operator panel.
2. a modem can be attached to any of the serial ports.