Removal and replacement procedures 54
2.
Remove the access panel ("Removing the access panel" on page 28).
3. Remove the malfunctioning hot-plug fan from the server.
4. Install the replacement fan.
5. Repeat to replace additional fans as needed.
6. Observe the LED on each installed fan to be sure it is illuminated green ("Hot-plug fan LEDs" on
page 89).
7. Observe the internal system health LED on the front panel to be sure it is illuminated green ("Front
panel LEDs and buttons" on page 73).
NOTE: If the front panel internal system health LED is not green after you install hot-plug fans, reseat the hot-
plug fan or refer to the troubleshooting section.
Memory overview
This server supports up to four memory boards. Each memory board contains four DIMM slots for a total
of 16 DIMM slots in the server. Memory can be expanded by installing PC2-3200R Registered DDR2
DRAM DIMMs.
The server supports a host of AMP options to optimize server availability:
• Advanced ECC ("Advanced ECC memory" on page 55)
• Online spare memory (on page 56)
• Hot-plug mirrored memory (dual- and quad-board) ("Hot-plug mirrored memory" on page 57)
• Hot-plug RAID memory (on page 58)
Hot-plug operations can be hot-add or hot-replace. Hot-add makes additional memory resources available
to the operating system. Hot-replace allows failed or degraded DIMMs to be replaced while the server is
running.
The maximum supported total memory for this server is 64 GB using four memory boards. The maximum
supported memory per memory board is 16 GB using four 4-GB DIMMs.
For an overview of single- and dual-rank DIMMs, refer to "Single- and dual-rank DIMMs (on page 55)."
For DIMM slot locations and bank assignments, refer to "DIMM slot locations (on page 84)."
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