To familiarize yourself with the computer

Figure 2-1 The Computer

You should take some time to study the front of the computer. The following illustration shows the front panel of the computer.

Figure 2-2 Computer Front Panel

The front of the computer. All of the switches and indicators on the computer are located along the top, in the front of the computer as shown in the figure above.

ON/OFF switch: Controls the DC power (not the AC power from the wall outlet) for the computer, the internal disk drive, and internal tape drive. Once the computer has started, you should turn this off only as part of the shutdown procedure.

	CAUTION: The OFF part of the front panel switch only disconnects the DC power from the inside of the computer cabinet. AC voltage is still present at the computer power supply. The AC power can be removed only by unplugging the power cord.

Run: (Operating State Indicator). This green light indicates that the computer is running normally. It can work in conjunction with the attention light.

Attention: (Operating State Indicator). When the yellow indicator light is on something other than normal operation is occurring, but no fault has occurred. For example, testing, initializing or system shutdown.

Fault: This orange light indicates that a fault exists in the computer.

Remote Enabled: When this yellow light is on, it indicates that remote access through a modem port is enabled, allowing outside access to the computer. This is useful if remote support is desired. When this light is off, the remote access is disabled or denied.

Tape Drive

Figure 2-3 Tape Drive (3.5-inch DDS)

Cassette Light and Drive Light: These lights indicate the states of the tape drive. See the Interpreting Tape Drive Indicator Status Lights section at the end of this chapter.

Cassette Slot: Here you insert and retrieve the DDS tapes needed for storing information onto tapes.

Cassette Unload Button: This button stops any tape operation, rewinds the tape and ejects the cassette from the tape drive.

Interpreting Tape Drive Indicator Status Lights

The various status states that you see displayed are shown in the following table.

Table 2-1 HP 3.5-inch DDS Tape Drive

Cassette Light	Drive Light	Condition
No Cassette States
Off	Off	No cassette loaded, or power is off.
Flash Yellow	Flash Yellow	Self-test in progress.
On Green	Flash Green	No cassette; tape drive is active.
Write Enable States
On Green	On Green	Cassette loaded; tape drive online.
On Green	Flash Green	Cassette loaded; tape drive active.
Pulse Green	Pulse Green	Loading, unloading, or ejecting cassette.
On Green	Off	Tape drive offline.
Write Protect States
On Yellow	On Green	Read-only cassette loaded; tape drive online.
On Yellow	Flash Green	Read-only cassette loaded; tape drive active.
Pulse Yellow	Pulse Green	Loading, unloading, or ejecting cassette.
On Yellow	Off	Tape drive offline.
Error States
On Green	Pulse Green/Yellow	Caution1 (media warning).
On Yellow	On Yellow	Moisture detected,2 or no termination resistors.
Pulse Yellow	On Yellow	Fault3.

 

¹ This occurs during writes where an excessive number of read-after-write errors occur and persists until the cassette is unloaded.

² The termination resistor problem occur only at power-on time, and the tape drive appears to have hung during self-test.

³ Indicates a failure of the DDS field replaceable unit.