DELTA 307063 0 308 SVN¸»} ƒO·€ƒM(¶tƒM [2016-10-20] Several recent Dell systems fail to find a bootable disk when the system boots in Legacy/BIOS/CSM mode, the boot disk is partitioned with GPT, and the Active flag in the Protective MBR is not set. To work around this issue, either configure the system to boot in UEFI mode, or choose the "GPT + Active" scheme.