Over the course of time a number of different form factors have been used for the Ultrabay. These are usually not compatible, but see below for details. Current Thinkpads use either the Serial Ultrabay Slim (accommodates drives up to 9.5mm high) or the Serial Ultrabay Enhanced (accommodates drives up to 12.7mm high). See Ultrabay Devices for a list of all Ultrabay devices.
|Serial Ultrabay Slim||-||-||-||-||-||-||-||-||-||yes||yes|
|Serial Ultrabay Enhanced||-||-||-||-||-||-||-||-||-||-||yes|
- no hot swapping
- UltraBay Thick
- thicker version of UltraBay to support CD-ROM drive
- UltraBay II
- supports hot swapping; cutout lower right corner of the bezel
- UltraBay FX
- combined floppy drive and optical drive found in the 390/390E/390X
- supports hot swapping; frame, rectangular bezel with beveled lower edge
- Ultrabay 2000
- supports hot swapping (except in ThinkPad Dock I); frame, cutout lower right corner of the bezel
- Ultrabay Plus
- like the Ultrabay 2000 but can take the Ultrabay Plus Device Carrier which in turn can hold the Ultrabay Plus Cradle for the WorkPad C500 or the Ultrabay Plus Numeric Keypad
- Ultrabay Slim
- supports hot swapping; thinner (9.5 mm) than the Ultrabay 2000; cutout lower right corner of bezel; the 4x and 5x series have different battery connector from the 6x series
- Ultrabay Enhanced
- supports hot swapping; thicker (12.7 mm) than the Ultrabay Slim but does accept Ultrabay Slim devices
- Serial Ultrabay Slim
- supports hot swapping; same dimensions as the Ultrabay Slim; supports Ultrabay Slim battery, but not in models supporting slice battery attached to the bottom of the laptop, e.g. T410/T510 (even then there seems to be some mechanical difficulties—see discussion); some versions with a flat bezel, some versions with beveled lower edge
- Serial Ultrabay Enhanced
- supports hot swapping; same width and depth as the Serial Ultrabay Slim, but is 3mm higher; slim devices work fine, but do not fit accurately and (may) disconnect on movement; see the Serial Ultrabay Slim notes about battery
A CDRW/DVD-ROM Superdrive (scavenged from a Mac iBook) will fit in an Ultrabay 2000. The original face won't fit in the bay, leaving a bare metal front. When the drive spins up, it blows a lot of air out. Maybe that's an anti-dust measure?
In general, Ultrabay 2000 CD drives have a standard connector, and can therefore be replaced by most other 12.7 mm drives. You might have to do some cutting of the plastic face plate.
The Ultrabay Slim CD drives however, have a proprietary connector. You can not replace them with any 9.5 mm CD drive.
The pinout switching is done by the BIOS and hardware, so that it is completely transparent to the operating system.
- Floppy drives are supported by the standard floppy driver.
- ZIP drive support is possible through the ide-disk driver.
- IDE hard disks and optical drives are supported by the ata_piix or older ide-disk driver in the linux kernel.
- Batteries are automatically handled by the hardware, but can be controlled further by using tp_smapi.
- UltraBay Plus devices should be handled by the USB subsystem, but if the actual devices are is not known.
See also How to hotswap Ultrabay devices.
- IBM originally used the spelling "UltraBay" with a capital letter bee but later switched to "Ultrabay" with a lower-case bee.