CF Card slot

The CF Card slot (Compact Flash) is found on select ThinkPads.

This is a CF+ Type II slot.

• Wikipedia article on CF Cards

PCI based CompactFlash

This is implemented as a PCI device, that can support both CF memory cards, and CF IO cards (e.g. Bluetooth or WiFi).

Linux support

This is handled by the Linux PCMCIA subsystem.

Models featuring this Technology

• S30, S31
• X20, X21, X22, X23, X24
• X30, X31, X32
• TransNote

USB based CompactFlash

This is implemented as a USB device, and can only support CF memory cards.

Linux support

This is handled by the Linux USB Storage subsystem (usb-storage).

Models featuring this Technology

• ThinkPad Advanced Dock