I inherited a slightly used laptop (Toshiba Satellite C650D), the original drive was failing.
I removed the original drive and replaced it with a Western Digital hybrid drive (8GB SSD, 1TB drive) that I used to have in another laptop.
When I try to boot it, the post screen says:
Intel UNDI, PXE-2.0 (build 083)
For Atheros PCIE Ethernet Controller v2.02.7
Check cable connection!
PXE-M0F: Existing Intel PXE ROM
No bootable device -- insert boot disk and press...
The drive is correctly installed, there's no other way to install it, the connector is fully in and you have to screw a corner of the casing so there's really no other/wrong way it can possibly be installed. To be sure I also removed it and inserted it back in.
I also booted from a DBAN boot CD, as my intention is to wipe the old data first. DBAN doesn't see a drive installed either.
So this leaves me to wonder if maybe this laptop isn't compatibe with this type of drive? (hybrid drive)
When I press F2 to get into the setup, it sees the drive as a 8GB SSD drive, so the BIOS is seeing the drive (not sure if it should also be seeing the rest of the 1TB drive or if this is normal but it's seeing something which proves at least that it's plugged in correctly)