Drive Led Activity - IBM DS4000 EXP810 Installation, User's, And Maintenance Manual

Attention
Before you power on a DS4000 storage subsystem without any internal
drive slots, the DS4000 must be cabled to at least one storage expansion
enclosure populated with at least two E-DDMs. If at least two E-DDMs are
not installed in each attached storage expansion enclosure when you power
on the DS4000 storage subsystem, your standard storage partition key will
be lost and will need to be regenerated using instructions on the IBM
DS4000 Solutions and Premium Features Web site:
https://www-912.ibm.com/PremiumFeatures/
Additionally, if at least two E-DDMs are not installed in each attached
storage expansion enclosure, the resulting insufficient load to the storage
expansion enclosure power supply CRUs might cause the storage
expansion enclosure power supply CRUs to intermittently appear as failed
and then reappear in an optimal state, falsely indicating that the power
supply CRUs are bad.
v E-DDM CRU labels: A label is provided on the front of each E-DDM. Use this
label to record the location information for each E-DDM before you remove it.
Ensure that you keep track of the E-DDMs and their corresponding bays. Also,
record the location information in Table 43 on page 150. If you install an E-DDM
in the wrong bay, you might lose data.
v Drive LEDs: Each E-DDM CRU tray has two associated LEDs, a green Activity
LED and an amber Fault LED. These LEDs indicate the status for that E-DDM.
See Table 36 for the drive LED states and descriptions.
v E-DDM CRUs are not interchangeable between the EXP810 and other DS4000
storage expansion enclosures such as EXP710s.
Table 36. Drive LED activity
LED LED state
Activity LED Flashing green The green LED flashes to indicate fibre-channel activity to
Activity LED Steady green
Fault LED Flashing
amber
Fault LED Steady amber
Activity and All unlit
Fault LEDs
Descriptions
the drive.
The green LED lights to indicate that the drive is properly
installed and is spun up by the DS4000 controller.
The amber LED flashes to indicate that a drive has been
identified by the software.
The amber LED lights to indicate a drive failure. The green
activity LED will be flashing one every 2 seconds if the
DS4000 storage subsystem is spinning down the drive. The
drive can also be put in a failed state if the drive is not
certified for the DS4000 storage subsystem that the
EXP810 is connected to. Use the DS4000 storage
subsystem Management window to verify that this is the
case and replace the drive with the drive option or
CRU/FRU that is certified for that particular DS4000
storage subsystem.
Check for and resolve one of the following situations:
v EXP810 is turned off.
v EXP810 enclosure speed is not set correctly.
Chapter 5. Installing and replacing components
93