Sometimes Blancco Drive Eraser / Blancco 5 might not be detect connected hard drives (one or more).

For SATA drives:

• This can happen if the hard drives have been set to IDE/ATA mode in BIOS.
  • SATA drives need to be set in either "AHCI" or "SATA native" mode (or similar) from BIOS/UEFI.

For NVMe drives:

• Some devices require the BIOS/UEFI to be switched from RAID to AHCI mode in order to successfully present the drive to the system.
  • If the device's controller doesn't support AHCI mode, you can remove the drive from the machine and run the erasure by connecting the drive to a supported machine.