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Incorrect baud rate causes Exadata Node to not Show System POST (Power On Self Test) , BIOS Boot Menu, nor the grub Menu During Power On. (Doc ID 2152050.1)

Last updated on OCTOBER 04, 2021

Applies to:

Exadata X5-2 Hardware - Version All Versions to All Versions [Release All Releases]
Exadata X5-8 Hardware - Version All Versions and later
Exadata X5-2 Eighth Rack - Version All Versions and later
Exadata X5-2 Full Rack - Version All Versions and later
Exadata X5-2 Half Rack - Version All Versions and later
Information in this document applies to any platform.

Symptoms

During Exadata node power on, the system POST, the BIOS Boot menu, and the OS grub menu are not shown.
Instead, several lines of unexpected garbage (or junk) characters are shown until the OS starts.
Once the OS starts, you then see expected console message as the OS launches.
Since you cannot see the BIOS Boot Menu nor the grub menu,  you are not able to easily boot into the system BIOS, nor select a different boot option, such as "CELL_USB_BOOT_CELLBOOT_usb_in_rescue_mode"

The example below shows the unexpected garbage characters.
The characters you see may be different than the ones in this example.

 

Cause

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