Installing Hot-Swap E-Ddms - IBM DS4700 Installation, User's, And Maintenance Manual

Table 49. Drive LED activity (continued)
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 E-DDM in the storage subsystem,
v Hot-swap hardware: The DS4700 Express contains hardware that enables you

Installing hot-swap E-DDMs

With the exception of the DS4000 storage subsystem initial power up, add E-DDMs
while the storage subsystem is turned on and running. Complete the following steps
to install hot-swap E-DDMs in the storage subsystem:
Attention:
v After you remove a E-DDM CRU, wait 70 seconds before replacing or reseating
v The DS4700 Express and EXP810 E-DDMs and FRUs are not compatible with
1. Read the documentation that comes with the E-DDM.
2. Check for Fault LEDs shown in Figure 110 on page 154. If any amber LEDs are
LED state
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 E-DDM without turning off the storage subsystem. You can
continue to operate your system while an E-DDM is removed or installed. These
E-DDMs are known as hot-swap E-DDMs.
it to allow it to properly spin down. Failure to do so may cause undesired events.
the DS4200 Express and EXP420 EV-DDMs and FRUs.
lit, see "Solving problems" on page 183.
Descriptions
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 DS4700 Express is turned off.
v DS4700 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
correct.
Drive failure due to the incorrect link rate speed setting or
internal drive hardware failures.
Chapter 5. Replacing components
153