HP LH4r HP Netserver Service Handbook, Volume 3 - High-End - Page 41

Covers, Memory

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Covers Screws For Hot-Plug PCI Access Cover Top Cover Screws for Top Cover Hot-Plug PCI Access Cover I/O Shield WARNING Before removing the top cover, always disconnect the power cord and unplug telephone cables. Disconnect the power cord to avoid exposure to high energy levels that may cause burns when parts are short-circuited by metal objects such as tools or jewelry. Unplug telephone cables to avoid exposure to shock hazard from telephone ringing voltages. Note that standby power does not turn off when the front panel power switch is turned off. If the control panel backlight is on, standby power is on. Unplug the AC power cord to turn off standby power. Wait 20 seconds before opening the NetServer; the hi-current power supply modules will take this long to dissipate the stored energy. NOTE After unplugging the AC power cord, the Power (green) LEDs at the back of the power supply modules will continue to flash for about 20 seconds. This is normal. Memory • Add (or remove) DIMMs to the memory board in groups of four. Each group of four DIMMs must fill one bank on a memory board. A bank must be either fully populated or completely empty. • When populating a memory board, fill Bank A first, then Bank B, then Bank C, and finally Bank D. You must do this if a board is to have four-way interleaving. • All DIMMs within a bank must be identical in size and speed. A bank must contain either all 64 MB DIMMs or all 256 MB DIMMs. • Banks of 64 MB DIMMs and 256 MB DIMMs can coexist on the same memory board. • The minimum memory configuration is four 64 MB DIMMs in one bank on the primary (right- hand) memory board, and no DIMMs on the left-hand board. When the system has two memory boards but only four DIMMs, all four DIMMs must be on the primary memory board. (The left-hand, secondary, board must always be in the system, even if it holds no DIMMs.) 35

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35
Covers
Hot-Plug PCI
Access Cover
I/O Shield
Top Cover
Screws For
Hot-Plug PCI
Access Cover
Screws for
Top Cover
WARNING
Before removing the top cover, always disconnect the power cord and unplug
telephone cables. Disconnect the power cord to avoid exposure to high energy
levels that may cause burns when parts are short-circuited by metal objects such as
tools or jewelry. Unplug telephone cables to avoid exposure to shock hazard from
telephone ringing voltages.
Note that standby power does not turn off when the front panel power switch is
turned off. If the control panel backlight is on, standby power is on. Unplug the AC
power cord to turn off standby power. Wait 20 seconds before opening the
NetServer; the hi-current power supply modules will take this long to dissipate the
stored energy.
NOTE
After unplugging the AC power cord, the Power (green) LEDs at the back of the
power supply modules will continue to flash for about 20 seconds. This is normal.
Memory
•
Add (or remove) DIMMs to the memory board in groups of four
.
Each group of four DIMMs must
fill one bank on a memory board.
A bank must be either fully populated or completely empty.
•
When populating a memory board, fill Bank A first, then Bank B, then Bank C, and finally Bank
D.
You must do this if a board is to have four-way interleaving.
•
All DIMMs within a bank must be identical in size and speed
.
A bank must contain either all 64
MB DIMMs or all 256 MB DIMMs.
•
Banks of 64 MB DIMMs and 256 MB DIMMs can coexist on the same memory board
.
•
The minimum memory configuration is four 64 MB DIMMs in one bank on the primary (right-
hand) memory board, and no DIMMs on the left-hand board.
When
the system has two memory
boards but only four DIMMs, all four DIMMs must be on the primary memory board. (The left-hand,
secondary, board must always be in the system, even if it holds no DIMMs.)