IBM TotalStorage DS4800, User, Installation And Maintenance Manual

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6. Use the DS4000 Storage Manager client software to take the controller offline.
After the controller is offline, the Service Action Allowed LED turns on, and you
can safely remove the controller.
7. Slide the controller with the open circuit breaker from the storage subsystem.
You do not need to completely remove the controller. Only slide it out far
enough to reveal the holes over the circuit breakers.
a. Using your index fingers, simultaneously push the latches to release the
levers, and rotate the levers to disengage them from the locking pins.
b. Use the levers to slide the controller from the storage subsystem chassis.
(Figure 78 on page 127 shows a controller sliding from the storage
subsystem chassis.)
Host channels
RS-232
serial port
Ethernet ports
Dual-ported
drive channels
AC
power DC
power
Host channels
RS-232
serial port
Ethernet ports
Dual-ported
drive channels AC
power
DC
power
Controller A
Controller B
Strain-relief
clamp
Strain-relief
clamp
ds48015
Figure 77. RAID controller connections
126
IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide