5190/5194 Modular Tape Subsystem Manual

Installing the Modular Tape Subsystem
5190/5194 Modular Tape Subsystem Manual—426878-002
3-41
Checking and Setting the Device ID
ACL Power-Up Sequence
An AC power switch at the rear of a tape drive CRU controls power to both the drive
and the ACL. When power is applied, the ACL performs a series of self-tests to verify
operation of the ACL control panel LEDs and the autoloader. The power-up sequence
includes the following events on the ACL front panel:
1. The LEDs and tape-position indicators light.
2. The blinking SELFTEST message appears on the message panel. The cartridge
position indicator cycles through the slot positions.
3. The DOOR LOCK LED lights. The EJECTING message appears on the message
panel. The AUTO LED lights.
4. The SEL LED flickers to indicate that the formatter is polling the drive for
information.
5. An asterisk (*) appears on the message panel to indicate that the drive is ready for
operation.
If the magazine door is open during the power-up sequence, a message prompts you
to close the door. The drive is ready for operation when an asterisk (*) appears on the
message panel. You can load a cartridge at this point by pressing the START button.
If an error message appears during the power-up sequence, see Responding to Error
Messages and Check Codes on page 4-31.
Tape Drive Power-Up Sequence
When power is applied to a tape drive, the drive performs a series of self-tests to verify
operation. The power-up sequence includes the following events on the drive front
panel. Just after power is applied, the LEDs and tape-position indicators light and the
SELFTEST message appears on the message panel. If a cartridge is loaded, the drive
automatically rewinds the tape and ejects the cartridge.
The drive is ready for operation when an asterisk (*) appears on the message panel.
You can load a cartridge at this point by inserting the cartridge and pressing the START
button. If an error message appears during the power-up sequence, see Responding
to Error Messages and Check Codes on page 4-31.
Checking and Setting the Device ID
The device ID of a tape drive identifies the drive to the system. You can display the
device ID, which is set by the tape drive CRU firmware, by using the operator buttons
on the drive or ACL front panel.
Unless the modular tape subsystem is included with a system order, tape drive CRUs
are shipped with a device ID of 5. Refer to Table 3-3 on page 3-5 for other supported
device IDs, depending the connecting controller or adapter.