Dell POWEREDGE 1955 - Manual (Page 27)

About Your System
27
Important I/O Configuration Considerations
Insure that you read the DRAC/MC module’s readme.txt file. It contains updated information, including
system indicator behavior in certain conditions.
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 a module of the same fabric
type is present in bay 1, and bay 4 should have an I/O module installed only if a module of the same fabric type 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.
Unless your system is configured according to these guidelines, do not perform any of the following actions:
• Upgrade DRAC/MC firmware
• Issue a software reset command for a DRAC/MC, such as racadm racreset
• Reseat a DRAC/MC module
• Cause a DRAC/MC failover event, such as removing the network cable from the primary DRAC/MC, or rebooting
a switch that the DRAC/MC cable is connected to
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 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.
Primary/secondary
indicator Off The DRAC/MC is a backup for the master DRAC/MC.
NOTE:
For information on availability of dual (redundant)
configurations for the DRAC/MC, see www.dell.com.
Green The DRAC/MC is active for system management.
Green blinking The DRAC/MC is in special or manufacturing mode.
Fault indicator Off The DRAC/MC is operating normally.
Amber In a single (nonredundant) configuration, this DRAC/MC failed.
See "DRAC/MC Module" on page 61.
Amber blinking In a dual (redundant) configuration (when available), this
DRAC/MC failed. See "DRAC/MC Module" on page 61.
Serial connector None Used for a serial connection with a null modem cable.
Table 1-8. DRAC/MC Module Indicators (continued)
Indicator Type Icon Activity
Indicator Indicator Code