Dell POWEREDGE 1855 - Manual (Page 49)

3. Slide the DRAC/MC module out of the chassis.
Installing a DRAC/MC Module
1. Ensure that the DRAC/MC module release lever is fully extended. See Figure 6 -4 .
2. Slide the module into the chassis until it is fully seated.
3. Close the release lever until it snaps securely into place.
4. Reconnect the cables that were attached to the module.
Figure 6-4. Removing and Installing a DRAC/MC Module
DRAC/MC Version 1.1 (or Later) Module
If you have a DRAC/MC version 1.1 (or later) module installed, ensure that you read that product's readme.txt file. It contains updated information, including
system indicator behavior in certain conditions.
Important I/O Configuration Considerations
Unless your system is configured according to these guidelines, do not perform any of the following actions:
l Upgrade DRAC/MC firmware
l Issue a software reset command for a DRAC/MC, such as racadm racreset
l Reseat a DRAC/MC module
l Cause a DRAC/MC failover event, such as removing the network cable from the primary DRAC/MC
Performing any of these actions will power off and stop traffic on the bay 2 or bay 4 I/O module, resulting in data loss.
When initiated, the DRAC/MC version 1.1 (or later) firmware algorithm must find a module in bay 1 before bay 2 and a module in bay 3 before bay 4.
Otherwise, the module in bay 2 or bay 4 will be powered off if you perform a firmware upgrade procedure on the DRAC/MC, cause a DRAC/MC failover, or reset
the DRAC/MC.
See the current Dell Remote Access Controller/Modular Chassis User's Guide at support.dell.com for more information about configuring your DRAC/MC system.
Redundancy Support
If you are adding a DRAC/MC version 1.1 (or later) module to a system to enable redundancy, the firmware levels of both DRAC/MC modules must be version
1.1. If the DRAC/MC module currently in the system is version 1.0, you must upgrade the firmware of the current module to version 1.1 prior to installing the
new DRAC/MC version 1.1 (or later) module.
CAUTION: Data loss can result if you perform certain actions on a system in which the I/O bays have not been configured correctly. Specifically,
bay 2 should have an I/O module installed only if an identical module is present in bay 1, and bay 4 should have an I/O module installed only if
an identical module is present in bay 3. Except in these cases (or in a case where you temporarily need to swap a failed I/O module in bay 1 or
3), bays 2 and 4 should be unoccupied.
NOTE: A DRAC/MC module's firmware version is displayed on its web-based GUI or by typing the command getsysinfo or racadm getsysinfo.
NOTE: DRAC/MC version 1.1 (or later) firmware uses a different MAC address than the MAC address reported by DRAC/MC version 1.0 firmware.
Therefore, a DHCP-assigned dynamic IP address may change after updating to the DRAC/MC version 1.1 firmware.