Serial Ultrabay Slim HDD Adapter II

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This adapter allows an extra hard drive to be inserted into the Serial Ultrabay Slim.


  • Takes any SATA 9.5mm thick, 2.5" HDD/SSD.
  • If used in a Serial Ultrabay Enhanced, it will also accept 12.7mm high drives.

Ultrabay Slim ThinkPad Serial Hard Drive Bay Adapter III

This SATA HDD adapter only works with select ThinkPads as listed below. For other machines with UltraBay Slim, use the PATA base UltraBay Slim HDD Adapter or the previous Ultrabay Slim SATA HDD Adapter or Ultrabay Slim SATA HDD Adapter II instead.

Part numbers

  • Marketing P/N: 43N3412
  • ASM P/N: 43N3414
  • FRU P/N: 43N3415

Linux support

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

Supported with

Finding correct adapter

please pay attention to the plastic border if you are buying from third parties.


Screw 4 screws in the mounting holes of the hard disk / solid state drive.


Slide the screw heads under the plastic notches while plugging in the drive in the Ultrabay adapter.


Finally, close the black plastic lever to prevent the drive from sliding backwards.

Vendor documentation

Other documentation