Tag Archive for 'system'

Mean time between failures

Mean time between failures (MTBF) is the mean (average) time between failures of a system, and is often attributed to the “useful life” of the device i.e. not including ‘infant mortality’ or ‘end of life’ if the device is not repairable. Calculations of MTBF assume that a system is “renewed”, i.e. fixed, after each failure, and then returned to service immediately after failure. The average time between failing and being returned to service is termed mean down time (MDT) or mean time to repair (MTTR).

It's just a matter of time.

It's just a matter of time.

Mathematically, the MTBF is the sum of the MTTF (mean time to failure) and MTTR (mean time to repair). The MTTF is simply the reciprocal of the failure rate, Continue reading ‘Mean time between failures’

Whitebox (Computer Hardware)

A “White box” PC is a personal computer assembled from off-the-shelf parts. The term is applied to systems assembled by small systems integrators, and to homebuilt computer systems assembled by end users from parts purchased separately at retail. In this latter sense, building a white box PC is part of the DIY movement.

With standardization of form factors such as ATX and connectors like IDE, a whole range of cases, motherboards, CPUs, hard disk drives, RAM and other parts can be obtained individually at many computer shops and assembled at home with a minimum of tools and technical skill. Alternatively, the shop itself may assemble components into a complete machine at a modest additional cost. Similarly, the term “whitebook” denotes a notebook computer assembled from off-the-shelf parts.

Operating system

While PCs built by system manufacturers generally come with a pre-installed operating system, White boxes from both large and small system vendors and other VAR channels can be ordered with or without a pre-installed OS. Usually when ordered with an operating system the system builder will use an OEM copy of the OS. Self-building white box PCs is still popular among users of the Linux operating system, though manufacturers such as Dell are beginning to offer that OS pre-installed.

Whitebook or Intel “Common Building Blocks”

Intel Corporation defined form factor and interconnection standards for notebook computer components, including “Barebones” (chassis and motherboard), hard disk drive, optical disk drive, LCD, battery pack, keyboard, and AC/DC adapter. These building blocks are primarily marketed to computer building companies, rather than DIY users.