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Table 31. Drive LED activity
LED
Activity LED
Activity LED
Fault LED
Fault LED
Activity and
Fault LEDs
Activity LED
Activity and
Fault LEDs
v Fibre-channel loop IDs: When you install a EV-DDM in the storage subsystem,
v Hot-swap hardware: The DS4200 Express contains hardware that enables you
Installing hot-swap EV-DDMs
With the exception of the DS4000 storage subsystem initial power up, add
EV-DDMs while the storage subsystem is turned on and running. Complete the
following steps to install hot-swap EV-DDMs in the storage subsystem:
Attention:
v After you remove a EV-DDM CRU, wait 70 seconds before replacing or reseating
v The DS4200 Express and EXP420 EV-DDMs and FRUs are not compatible with
1. Read the documentation that comes with the EV-DDM.
2. Check for Fault LEDs shown in Figure 73 on page 113. If any amber LEDs are
112
IBM System Storage DS4200 Express Storage Subsystem: Installation, User's and Maintenance Guide
LED state
Flashing green The green LED flashes to indicate fibre-channel activity to
Steady green
Flashing
amber
Steady amber
All unlit
Flashing once
every 2
seconds
Flashing
together in a
certain pattern
the drive tray connects into a printed circuit board called the midplane. The
midplane sets the fibre-channel loop ID automatically, based on the setting of the
enclosure ID switch and the physical location (bay) of the drive CRU.
to replace a failed EV-DDM without turning off the storage subsystem. You can
continue to operate your system while an EV-DDM is removed or installed. These
EV-DDMs are known as hot-swap EV-DDMs.
the EV-DDM CRU to allow it to properly spin down. Failure to do so may cause
undesired events.
DS4700 and EXP810 E-DDMs and FRUs.
lit, see "Solving problems" on page 135.
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 due to bad
or uncertified drive. The green activity LED might flash
once every 2 seconds, remain steady green, or be unlit.
Check for and resolve one of the following situations:
v DS4200 Express is turned off.
v DS4200 Express link rate speed is not set correctly.
Check for and resolve one of the following situations:
v The controller did not complete the boot process.
v DS4000 storage subsystem controller firmware is not
06.16.xx.xx and higher.
Drive failure due to the incorrect link rate speed setting or
internal drive hardware failures.
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