Some newer drives use a hole pattern different from the traditional drive hole pattern for the bottom mounting points. The location of the bottom holes close to the connector did not change; however, the bottom holes near the middle have been removed and replaced with bottom holes close to the front of the drive.
The drives with the new bottom hole pattern include: Seagate Iron Wolf drives (also missing the middle hole from the side mount hole troika)
Hitachi drives 8TB and larger
WD drives 8TB and larger
Incompatible mount holes Echo 15+ Dock (side mount, but needs middle hole, so incompatible with only Seagate Iron Wolf)
Fusion F3 (bottom mount)
Fusion D400Q/R400P/D500P (bottom mount)
Fusion D800/R800 (bottom mount)
Compatible mount holes Fusion R400S RAID (side mount)
Fusion R400 RAID USB 3 (side mount)
Fusion DX800/RX1600 (side mount) If using Iron Wolf line, must use Iron Wolf Pro with rotational vibration sensors
