Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 96)

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3.10 Resetting the CTS

You can use any of the following methods to reset the CTS:

Power the CTS off and back on again (power-on reset).

If a servo or hardware error has occurred, press the unload button

to clear the error and reset the CTS. (Then, if necessary, wait a

few seconds and press the button again to eject the tape.)

Send a RST pulse on the SCSI bus for a minimum of 25 µsec (SCSI

bus reset). A SCSI bus reset immediately clears all devices from the

bus, resets their associated equipment, and terminates all pending

I/O processes.

Issue a Bus Device Reset (0Ch) message to the CTS (device reset). A

device reset clears the CTS from the bus, causes all commands

sent to it to be cleared, and terminates all pending I/O processes.

Note: If a SCSI bus or device reset occurs during a power-on reset,

the power-on reset will be restarted.

Effect of Power-on Reset

Performing a power-on reset causes the CTS to complete its power-on

self-test as indicated by the LEDs (both on). In addition, a power-on

reset has the following effects:

If the CTS is connected to the SCSI bus, the SCSI bus goes to the

Bus Free phase.

A cyclic redundancy check (CRC) of the control code is performed.

The servo is reset and a servo self-test is performed.

All CTS parameters are reset to their default states.

A test of the microprocessor’s external memory is performed.

A buffer memory test is performed.

After a power-on reset, the CTS will respond on the SCSI bus within

three seconds.

3-34

EXB-8205 and EXB-8505

(Standard and XL)

510503

3 Implementing CTS Operations

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