PowerEdge: PERC Shows as Missing in R740/R740xd After Parts Replacement
Summary: PowerEdge R740 and R740xd, but not the R740xd2, use the Mini PERC interposer (04M4C). In R730 servers this was referred to as onboard C-stack.
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Symptoms
Failure to install the Mini PERC interposer results in the PERC appearing as missing, errors in the logs, and missing drives.
Cause
The Interposer board is required for the PERC connection to the motherboard, if it is not properly connected the PERC has no connection to the Motherboard.
Resolution
Solution:
If the PERC is not showing up after replacing or reseating parts in a R740 or R740xd system, verify that the Mini PERC interposer is installed, and replace it when necessary.
Affected Products
AX-740XD, Dell EMC XC Series XC740xd Appliance, Dell EMC XC Core XC740xd System, OEMR R740, OEMR R740xd, PowerEdge R740, PowerEdge R740XD, PowerEdge RAID Controller H330, PowerEdge RAID Controller H730, PowerEdge RAID Controller H730P
, PowerEdge RAID Controller H740P, Dell EMC vSAN R740 Ready Node, Dell EMC vSAN R740xd Ready Node
...
Products
Storage Spaces Direct R740xd Ready Node, PowerFlex appliance R740XDArticle Properties
Article Number: 000143431
Article Type: Solution
Last Modified: 02 Jun 2026
Version: 6
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