UltraBay FX CD-ROM+Floppy Drive

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UltraBay FX CD-ROM+Floppy Drive (05K8986)

This is a stacked optical and Floppy drive that slides into an UltraBay FX.


  • Read/Write capabilities
    • CD-ROM, CD-R, CD-RW (24x read speed)
    • 3.5-inch 1.44MB High Density
    • 3.5-inch 1.25MB Japanese Density
    • 3.5-inch 720KB Double Density
  • Tray loading
  • Activity LEDs

Part numbers

LG CRN-8241B with unknown floppy drive

  • 05K9249, 05K8979, 27L3629 (optical drive), 27L3529, 05K8978 (floppy drive), 05K8996, 05K8935, 05K9248 (combo bracket)

Sanyo CRD-S372B with unknown floppy drive

  • 05K9075 (optical drive), 05K8978 (floppy drive), 05K8996, 05K8935, 05K9248 (combo bracket)

unknown optical drive with unknown floppy drive

  • 05K9191 (optical drive), 05K8978 (floppy drive), 05K8996, 05K8935, 05K9248 (combo bracket)


A bootable firmware update was released back in 2004 for these optical drives, it can be downloaded here. It supports and updates the CRD-S372B (to 1.25), CRD-S372V (to 1.25), CRN-8241B (to 1.30/1.16), CRN-8241U (to 2.28), and the CRN-8245B (to 1.16) drives.

Linux support

If connected at boot time, the optical and floppy drive is normally /dev/sr0 and /dev/fd0 respectively.

Models supporting this accessory