I have been working with an HP DL380 Gen9 and have been having issues. I can complete the initial install of CE 2.0 from a USB image, but on the next boot I get the grub rescue screen.

I have set the Smart Array to HBA, I have tried all manor of HDD/SSD options and have simplified the install with 2 Crucial MX500 1 TB SSD’s. I have even bypassed the p440ar card and SAS extender and plugged into the SATA connectors on board. I am installing to a 32GB SD Card. I have tried USB 3.0 device installs and changing brands of SD Cards and USB sticks both for install media and boot devices. I have reset the configuration on the machine multiple times. I have set boot mode to legacy BIOS and have unchecked single cluster install. All drives are visible in the installer. There are no timeouts our errors during the install.

If I attempt to repair and ls (hd0,mdos1)/boot or any sub directories I get an attempt to read or write outside of partition error. (hd0,msdos1) is the only partition readable. I’m really not sure what I am doing wrong and would love some suggestions to try moving forward.