Dell DR4300 DR Series System Administrator Guide - Page 107

Hardware Removal or Replacement, DR Series System: Proper Shut Down and Start Up

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Hardware Removal or Replacement To properly remove or replace any DR Series system hardware, you must observe and use the best practice shut down and start up procedures. For a comprehensive set of removal and replacement procedures with step-by-step instructions, see the Dell DR Series System Owner's Manual. For more information about the best practices, see DR Series System: Proper Shut Down and Start Up and Shutting Down the DR Series System. DR Series System: Proper Shut Down and Start Up Before you attempt to remove or replace any hardware component in the DR Series system, ensure that you observe the following best practices for properly shutting down and starting up the system. NOTE: To shutdown the DR Series system using a UPS after a power loss, refer to the following article for information on how to do this using the shutdown command in the IPMI interface: http://www.dell.com/ downloads/global/power/ps4q04-20040204-murphy.pdf. 1. Power off the DR Series system by selecting Shutdown in the System Configuration page. For more information, see Shutting Down the DR Series System. Another method you can use to shut down the system is the DR Series system CLI command, system --shutdown. 2. Allow the DR Series system to fully complete its power-down process. When the power-down process has completed, the Power Supply status indicator is unlit. 3. Disconnect the DR Series system power cables from the electrical power outlet. 4. Wait an additional period of time (up to 10 minutes), and/or verify that all of the green and amber NVRAM LEDs on the rear panel of the system chassis are unlit. NOTE: If you do not allow the NVRAM super capacitor sufficient time to discharge, the NVRAM status will report DATA LOSS when the DR Series system is subsequently powered up. 5. Unlatch the latch release lock and slide the DR Series system cover back and away to gain entry to the appliance internal components. To gain entry to the interior of the DR Series system, remove the cover. For more information, see the procedures in the Dell DR Series System Owner's Manual. 6. Remove and replace the system hardware components as needed. 7. Replace the cover, reconnect the system power cables to the electrical power outlet. 8. Power on the DR Series system by pressing the power-on indicator/power button. DR Series System NVRAM NVRAM is a field replaceable unit (FRU) in the DR Series system. The super capacitor that powers the NVRAM doubledata rate (DDR) memory must be able to move its contents to the solid-state drive (SSD) during a power loss. This data transfer requires maintaining the power to run the system for 3 minutes of operation (normally, it only takes approximately one minute). If a problem occurs during the data backup to the SSD, the subsequent system reboot detects this. NVRAM can experience backup failure when the following occurs: • The NVRAM failed to backup the data during the power shutdown • The super capacitor did not maintain sufficient power to backup the DDR contents into the SSD. • The NVRAM/SSD encountered an end-of-line (EOL) or another error. If any of these conditions occur, the NVRAM requires either a failure recovery or a replacement. 107

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Hardware Removal or Replacement
To properly remove or replace any DR Series system hardware, you must observe and use the best practice shut down
and start up procedures. For a comprehensive set of removal and replacement procedures with step-by-step
instructions, see the
Dell DR Series System Owner’s Manual
.
For more information about the best practices, see
DR Series System: Proper Shut Down and Start Up
and
Shutting
Down the DR Series System
.
DR Series System: Proper Shut Down and Start Up
Before you attempt to remove or replace any hardware component in the DR Series system, ensure that you observe the
following best practices for properly shutting down and starting up the system.
NOTE:
To shutdown the DR Series system using a UPS after a power loss, refer to the following article for
information on how to do this using the shutdown command in the IPMI interface: http://www.dell.com/
downloads/global/power/ps4q04-20040204-murphy.pdf.
1.
Power off the DR Series system by selecting
Shutdown
in the
System Configuration
page.
For more information, see
Shutting Down the DR Series System
. Another method you can use to shut down the
system is the DR Series system CLI command,
system --shutdown
.
2.
Allow the DR Series system to fully complete its power-down process.
When the power-down process has completed, the Power Supply status indicator is unlit.
3.
Disconnect the DR Series system power cables from the electrical power outlet.
4.
Wait an additional period of time (up to 10 minutes), and/or verify that all of the green and amber NVRAM LEDs on
the rear panel of the system chassis are unlit.
NOTE:
If you do not allow the NVRAM super capacitor sufficient time to discharge, the NVRAM status will
report
DATA LOSS
when the DR Series system is subsequently powered up.
5.
Unlatch the latch release lock and slide the DR Series system cover back and away to gain entry to the appliance
internal components.
To gain entry to the interior of the DR Series system, remove the cover. For more information, see the procedures in
the
Dell DR Series System Owner’s Manual
.
6.
Remove and replace the system hardware components as needed.
7.
Replace the cover, reconnect the system power cables to the electrical power outlet.
8.
Power on the DR Series system by pressing the power-on indicator/power button.
DR Series System NVRAM
NVRAM is a field replaceable unit (FRU) in the DR Series system. The super capacitor that powers the NVRAM double-
data rate (DDR) memory must be able to move its contents to the solid-state drive (SSD) during a power loss.
This data transfer requires maintaining the power to run the system for 3 minutes of operation (normally, it only takes
approximately one minute). If a problem occurs during the data backup to the SSD, the subsequent system reboot
detects this. NVRAM can experience backup failure when the following occurs:
•
The NVRAM failed to backup the data during the power shutdown
•
The super capacitor did not maintain sufficient power to backup the DDR contents into the SSD.
•
The NVRAM/SSD encountered an end-of-line (EOL) or another error.
If any of these conditions occur, the NVRAM requires either a failure recovery or a replacement.
107