Serial Ultrabay Slim HDD Adapter

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Serial Ultrabay Slim HDD Adapter (43R1980)

This is an adapter that slides into a Serial Ultrabay Slim.


  • One SATA slot for a 2.5-inch, 7 or 9.5-millimeter HDD/SSD/SSHD
  • Weight: 80 grams or 0.18 pounds


  1. This HDD adapter requires a caddy tray/bracket to be screwed onto the 2.5-inch storage drive, however if that is not possible, the screws can be used instead of the caddy tray/bracket.
  2. This HDD adapter cannot be used in any other model that is not in the 'supported' list, as it has a rectangular plastic tab which prevents it from sliding into the newer models' bays. However, if you were to Dremel it off, it will fit in other models using the same Ultrabay type.

UltraBay Slim SATA HDD Adapter.gif

Part numbers

Branded as the ThinkPad Serial ATA Hard Drive Bay Adapter II

  • 43R1984 (43R1981)

Linux support

If connected at boot time, the drive is normally /dev/sdb.

Models supporting this accessory

with the plastic tab intact

with the plastic tab removed