logical


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logical

1. relating to, used in, or characteristic of logic
2. using, according to, or deduced from the principles of logic
3. Computing of, performed by, used in, or relating to the logic circuits in a computer

logical

(From the technical term "logical device", wherein a physical device is referred to by an arbitrary "logical" name) Having the role of. If a person (say, Les Earnest at SAIL) who had long held a certain post left and were replaced, the replacement would for a while be known as the "logical" Les Earnest. (This does not imply any judgment on the replacement).

Compare virtual.

At Stanford, "logical" compass directions denote a coordinate system in which "logical north" is toward San Francisco, "logical west" is toward the ocean, etc., even though logical north varies between physical (true) north near San Francisco and physical west near San Jose. (The best rule of thumb here is that, by definition, El Camino Real always runs logical north-and-south.) In giving directions, one might say: "To get to Rincon Tarasco restaurant, get onto El Camino Bignum going logical north." Using the word "logical" helps to prevent the recipient from worrying about that the fact that the sun is setting almost directly in front of him. The concept is reinforced by North American highways which are almost, but not quite, consistently labelled with logical rather than physical directions.

A similar situation exists at MIT: Route 128 (famous for the electronics industry that has grown up along it) is a 3-quarters circle surrounding Boston at a radius of 10 miles, terminating near the coastline at each end. It would be most precise to describe the two directions along this highway as "clockwise" and "counterclockwise", but the road signs all say "north" and "south", respectively. A hacker might describe these directions as "logical north" and "logical south", to indicate that they are conventional directions not corresponding to the usual denotation for those words. (If you went logical south along the entire length of route 128, you would start out going northwest, curve around to the south, and finish headed due east, passing along one infamous stretch of pavement that is simultaneously route 128 south and Interstate 93 north, and is signed as such!)

logical

(1) A reasonable solution to a problem.

(2) A higher level view of an object; for example, the user's view versus the computer's view. See logical vs. physical.
References in periodicals archive ?
SL: The only logical thing to do is to walk faster.
PDM proactively detects possible drive failures before they occur and migrates data to a new healthy drive, minimizing the potential for data loss as well as the likelihood of a logical drive (array) going critical.
Ziff-Davis acquired Logical Operations in 1991, along with The Cobb Group, Louisville-based publisher of journals, CDs, and other online media resources for computer education.
Although Jick and his colleagues were coolly logical in their proposal at first, the push back from hospital leaders led to heated emotional reactions on their part, further fostering a downward spiral of economic outcomes, collaborative relationships and benefits for the community.
Logical intelligence is also known as "thinking smarts," "the problem-solving intelligence," and "conscious decision making." Our power to reason and think logically is not only what separates us from the beasts, it is also responsible for all human progress.
She holds that in deciding how the logical consequence relation shall be delineated we must take into account both theoretical and practical matters, and she suggests that to do so properly it is crucial to be clear about the role logic is expected to play (1991, 7, 36).
One solution for addressing the challenge of aggregating and managing capacity from multiple SAN-based devices is one already deployed in many end-user environments: the host-based logical volume manager (LVM).
Access control is the mechanism by which a system grants or restricts the right to access facilities (physical access) or computer networks and data (logical access).
In addition, Shoreline uses the IP SAN's logical volume management capability to create a separate volume for each server, which to the server now appears as a locally attached disk.
To IT managers, it generally means somehow masking the complexity of different storage components so they appear as a single logical storage pool that could be administered from a central point through a simple interface.
Physical disks are first virtualized into logical volumes to abstract their properties and ownership.
We can define storage virtualization as the presentation of a single interface to users that provides a logical view of data or storage devices different from the way data or storage is physically configured.