現象
The following warning may be seen in the kernel log:
DMAR: RMRR base: 0x0000006f55f000 end: 0x0000006f561fff
DMAR: [Firmware Bug]: No firmware reserved region can cover this RMRR [0x000000006f55f000-0x000000006f561fff], contact BIOS vendor for fixes
DMAR: [Firmware Bug]: Your BIOS is broken; bad RMRR [0x000000006f55f000-0x000000006f561fff]
Other OS with similar or upstream Linux kernel patch versions may report the same errors.
原因
This issue is caused due to the Linux kernel upgrade and design change. There have been rare situations where hardware replacement allowed the OS install to complete without receiving this error.
解決方法
Do not replace any hardware, unless advised by a GSE.
There is no actual functional impact. Dell EMC does not plan to change the 14G Intel platform BIOS core design for this specific issue.
対象製品
PowerEdge R240, PowerEdge R340, PowerEdge R440, PowerEdge R540, PowerEdge R640, PowerEdge R6415, PowerEdge R740, PowerEdge R740XD, PowerEdge R740XD2, PowerEdge R7415
製品
PowerEdge R7425, PowerEdge R840 Rack Server, PowerEdge R940, PowerEdge R940xa