Fault LED (amber)
When lit, this amber LED indicates an ESM board failure.
SCSI reset LED
When lit, this green LED indicates a SCSI bus reset.
Push pins Each ESM board has an orange push pin to the bottom left of the board. Use the orange push pin and lever to remove and insert the ESM board.
Termination-power LED (green)
When lit, this green LED indicates that termination power is present. (When a
LVD/SE LED (green)
When lit, this green LED indicates that the external host bus is in low voltage differential (LVD) mode. When this LED is off, this indicates that the external host bus is in
SCSI bus connector
The
Activity LED (green)
When lit, this green LED indicates there is activity on the external SCSI bus. Each external bus has a separate activity LED.
Working with hot-swap drives
Before you begin
•Read the safety and handling guidelines provided in “Safety information” on page 41 and "Handling electrostatic
•Ensure that your current system configuration is working properly.
•Back up all important data before you make changes to storage devices, such as hard disk drives.
This section explains how you can increase the expansion unit capacity by adding more drives or replacing existing drives with larger capacity drives.
Before you install or remove drive CRUs, review the following information:
Hot-swap hardware
You can replace a failed hard disk drive without turning off the expansion unit. Therefore, you can continue to operate your system while a hard disk drive is removed or installed. These drives are known as
Drive CRUs Your expansion unit supports IBM Ultra160 and IBM Ultra2 SCSI hard disk drives. These IBM drives come
Be sure to record the location information for each drive before you remove it. Ensure that you keep track of the drives and their corresponding bays.
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