SoulPad is a

mobile computing Mobile computing is human–computer interaction in which a computer is expected to be transported during normal usage, which allows for the transmission of data, voice, and video. Mobile computing involves mobile communication, mobile hardware ...

project developed by researchers at IBM. The project's aim is to provide a computer user with the ability to suspend their

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and resume it on another computer using a

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data storage device Data storage is the recording (storing) of information (data) in a storage medium. Handwriting, phonographic recording, magnetic tape, and optical discs are all examples of storage media. Biological molecules such as RNA and DNA are conside ...

. The SoulPad project is the subject of a paper entitled ''Reincarnating PCs with Portable SoulPads'', which won Best Paper at the 2005 ACM/ USENIX MobiSys conference. A demo video of the technology in action was made available on IBM's website. The researchers of the project have suggested that SoulPad could be used to boot one's operating environment from USB compatible storage devices such as

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s and

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s (the latter being used in the video demo of the project). The name SoulPad is derived from the project's aim to separate the underlying computer hardware (the "body" of the computer) from the user's operating environment (the "soul" of the computer). The "Pad" part is most likely a reference to IBM's former

ThinkPad ThinkPad is a line of business-oriented laptop computers and tablet computers, tablets designed, developed and marketed by Lenovo, and formerly by IBM until 2005, when IBM's Personal computer, PC business was acquired by Lenovo. ThinkPads have ...

line of

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computers.

Usage

To use SoulPad, the user first suspends the state of their operating environment to the USB storage device. The user then takes their USB storage device, connects it to another computer and boots from the device. The user's operating environment is then restored to its running state from when it was first suspended; all applications and services are resumed as if the operating environment had not ceased operation.

Implementation

The implementation of the technology is outlined in the SoulPad software stack, which is a model for the project's layers of

abstraction Abstraction in its main sense is a conceptual process wherein general rules and concepts are derived from the usage and classification of specific examples, literal ("real" or "concrete") signifiers, first principles, or other methods. "An abstr ...

. SoulPad utilizes the Live

Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which ...

distribution Knoppix as the "host" operating system; the computer system boots to Knoppix to recognize any devices the system has attached to it. The host then runs the

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, which resumes the user's last session in their operating system.

Issues

Issues addressed in the paper include the large amount of resources necessary to use SoulPad. In addition, the paper mentions the large amount of time it takes to resume from Soulpad (around two minutes), contrasted with the small amount of time it takes to suspend the operating environment. This is attributed to the need for Knoppix to recognize all the devices attached to the current machine. A solution suggested to correct this problem is to provide the user with a set of system profiles to choose from. Security concerns regarding access to the local disk on the temporary computer have also been raised.

References

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External links

*{{Commonscatinline Input/output Mobile software IBM software