Contents

What is a raid setup on a computer system?Like anything else it depends who you talk to.Raid hard drive systems had their acronym explained as Redundant Array of Individual Drives and Redundant Array of Inexpensive Drives. The acronym for this is the shortened term RAID.Capacity, reliability and performance are all important for file servers or other computer systems when you are storing large or very important files.It is often said that It is not if ...

An Introduction To Raid Greater Reliability ,faster, Less Costly Hard Drive Units

An Introduction To Raid  Greater Reliability ,faster, Less Costly Hard Drive UnitsWhat is a raid setup on a computer system?Like anything else it depends who you talk to.Raid hard drive systems had their acronym explained as Redundant Array of Individual Drives and Redundant Array of Inexpensive Drives. The acronym for this is the shortened term RAID.Capacity, reliability and performance are all important for file servers or other computer systems when you are storing large or very important files.It is often said that It is not if you hard drive will fail. It is at what point in time your hard drive will fail.Of course if your hard drives fail even if you have backup the last bit of data which was being written onto the hard drive when the failure occurred will be lost.You can get much greater capacities, avoid losing data from disk failure, and do all this with the RAID (the acronym for the system).RAID can now be done with standard commercially available hard drives so the cost is now within your price range for all the benefits and peace of mind RAID will give you.RAID can be simply explained as putting the hard drives in parallel sequence.The host adapter (usually called the RAID system controller) sits between one higher stream (on the computer side) and several lower rate data streams (on the hard drive side). When the computer writes to the disks , the host adapter takes high stream data and breaks it into many synchronized streams , one for each of the disks in process called Striping . Upon reading the data the host adapter takes the data stream from each disk multiplexes the sets of data streams and coordinates sending the resulting combined set of data onto the computer.It is all a matter of redundancy which makes RAID such a good thing in most cases.There are six different levels of RAID functionality depending on your requirements. the level of data security and integrity you want as well as the size of hard drive space you want.First of RAID Level 0 which spreads the data across multiple disks. You can get a similar effect to the RAID Level 0 by having multiple disks and using the features in Windows 2000 or its successor Windows XP.Since the data volume and rate to any specific disk is a fraction of the aggregate you will receive larger capacity and better performance from a RAID 0 setup than from any one conventional disk.As well data can be sourced from multiple drives as once. This can be most useful in shared situations which may benefit from enhancements in speed, two examples which come to mind are game servers and peer to peer (P2P) file or music file sharing servers.However since there is no allocation for error correction or redundancy RAID 0 is not a safe system for vital data. Data will be lost on disk failure. Only use RAID 0 in situations where you need the extended disk capacity or performance gain but not enhanced data reliability.Secondly in sequence there is RAID Level 1.In the same way that RAID 0 focuses solely on storage capacity and performance with no concern whatsoever on reliable data storage RAID 1, which us also called Disk Mirroring uses disks in pairs to save the files in a redundant manner.Several points.One performance may be slower as it takes time for the host adapter to send the data and for the drives to write it to disk,Secondly a user may delete or damage files which of course will be stored in that way on both drives.Raid 1 hence offers better reliability than RAID 0 or the conventional drive setups but does not give full security for your data or enhanced performance.Next in sequence we have RAID Levels 2, 3 and 4.Raid 2 adds one or more disks to hold error correction codes with which lost data can be reconstructed.Raid Level 3 is the same as RAID Level 2 but uses a simpler code the maximum storage capacity with Raid 3 may be somewhat less.Raid Level 4 is nearly the same as RAID LEVEL 3 but instead of Striping across disks is operates at a sector level, You now have the better situation of both a simpler , less intensive demanding system and as well as good data reliability . In addition performance may be enhanced as large data blocks can be written faster due to more coordinated writing to the drives in smaller sector areas.Lastly is RAID Level 5.Raid level 5 is the same as the excellent RAID Level 4 except that instead of dedicating a single disk to storing the data the data stream is striped across all the disks. You have greater performance with greater reliability for your computer systems.A RAID setup may take some effort and training on your part.Base your planning for your new RAID system on a careful analysis of your needs.What is important in your situation currently? Disk size capacities, data reliability and integrity, performance or a combination or all.

The Effects Of Tutorials In Photoshop

The Effects Of Tutorials In Photoshop

You've heard of the numerous tutorials in Photoshop available as online lessons and through CDs and have probably wondered if they are as effective as they promise. After all, you dont want to waste your time and money on a method of learning that will not have any benefits for you in the end. But can you effectively learn Photoshop through tutorials as well as you would in a classroom setting? Here, we examine the pros and cons:Practical reasons for using Photoshop tutorialsLet's face it: taking classes in Photoshop are more expensive than online and video tutorials. You will be paying not just for the instructor's fees but also for the facilities and use of equipment. However, you will be exposed to an environment where you have direct and immediate access to an instructor. Any questions or confusions you may have regarding a particular topic or instruction are easily resolved.IndependenceWith tutorials, you work on your own. This is an effective method of learning for you if you get distracted by other people easily or if you're shy. Tutorials cater to the different learning styles of users and learning is achieved depending on their willingness and on the effort they put in.ConvenienceAnother reason why tutorials are more attractive is because of its convenience, which attracts many people who want to learn Photoshop to the various online programs available. These are usually the people who can work well by themselves, have access to the Web and have reasonable computer skills. Tutorials also allow them to work anywhere, any time, at their own pace. If they want to skip some lessons, advance to another topic or spend more time on a particular subject, they can.And now the question: what are the effects of Photoshop tutorials?Photoshop is not just about learning how to use special tools, producing digital art and using special effects. It is also about understanding how these functions work separately so it is easier to use them in combination to create an integrated picture. That is why online tutorials such as http://Adobe.com, http://CBTCafe.com and http://PhotoshopCafe.com offer tutorials on the basics of Photoshop. Even video tutorials have sessions that introduce the program in its basic instructions. Learners are encouraged to know what Photoshop can do so they develop enough understanding to actually make it work. After all, users dont just memorize a series of steps in order to produce a certain effect. They must be able to use the instructions to create an entirely different work.Granted that you have the background and skills required for the software (knowledge of terminologies, basic computer skills), tutorials should be enough to teach you the basic and intermediate knowledge you need for learning the software. And you dont have to stop there. There are thousands of tutorials you can access online, most of which were developed by some of the industry's well-respected professionals. With so many resources available for your use, you need only to tap into them to learn everything you need to know.But tutorials alone will not turn you into an expert. Even the best Photoshop artists didnt get there by just knowing what to do. They had to work on hundreds of projects that range from the simple to the complicated in order to work with Photoshop confidently.Photoshop tutorials are effective if you have the inclination, interest and resources. After all, tutorials are just a method of learning and have been used for many years to teach people a wide variety of subjects from technical know-how to academics. It is what you do with what you know that will spell the big difference.

Life On The Go With Swiss Army Knife

Life On The Go With Swiss Army Knife

What is one thing that has seen wars, opened gazillions of canned beans, corned beef, soup, bottled colas, and beer, and is now sitting prettily at the New York Museum of Art? Your guess is as good as mine. Its the ever faithful Swiss Army knife.The Soldiers ValetForty-four years after the last armed conflict on Swiss territory, Karl Elsener designed the first prototype of the "Swiss Army knife" . This creative burst of genius was triggered by his indignation that the Swiss Army was issuing German-made pocket knives to their soldiers.His first design had a cutting blade, can opener, a punch, and a screwdriver the perfect mechanism for soldiers who had no time for an extra baggage. Five years later, he added a spring mechanism that secured two additional cutters on both sides of the handle. What made him add a corkscrew is something worth pondering but it was heaven sent.The soldiers could do a lot of things with one small device uncork a bottle of wine, whittle wood, mince onions, fix a loose screw, and clean their fingernails.This invention soon invaded the US Army. Finding it hard to say Offiziersmesser the GI Joes called it the Swiss Army knife, and the name stuck. Today 116 years later, Elseners invention is as multi-tasking as ever with added features such as the miniature scissors and the hair tweezers. The soldiers valet indeed marched with the times.Is that a Swiss Army Knife?Elsener sold his invention under the Victorinox label. Victorinox was coined from the combination of Victoria and inox, in honor of his mother Victoria and the stainless steel or inox he used for his knives.The famous utility knife invaded the golfing greens and is now on cyber mode with the latest Cybertool 34. Golfers have a use for the one handed divot repair tool, one handed removable ball marker, and groove cleaner. Computer technicians have uses for the 34 features of the Cybertool. It includes a bit wrench and a set of precision instruments for computers.Theres the Victorinox Swiss Memory USBs that boasts of a 256 and 512 MB memory sticks. These are compatible with Windows 98SE/ME/2000/MAC OS X, OS 8.6 and higher. These can be used also on a Linux 2.4 and higher.The Swiss Army knife with USBs includes different features like the LED light, scissors, blade, and retractable ballpoint pen.Not to be outdone, Wenger, another manufacturer, has come up with beautiful Swiss Army knife money clips. What do you know? This knife that comes with a limited lifetime warranty has bells and whistles, making it easy to locate from a sea of generic army knives.Great Gift ItemsNo one can resist a Swiss Army knife. Its like a tool shed or office to go. With its varied features and premium artisanship, who will say no? If you are thinking of functional, then get these while these are on sale. For a personal touch to the gift, have a special note inscribed. Just in time for the holidays, right?

How To Set Up A Free Website In 30 Minutes

How To Set Up A Free Website In 30 Minutes

A lot of businesses do not have a blog and the owners may spend little or no time on the internet but instead use word of mouth or traditional forms of marketing. The company owner may have little patience to learn about domains, web hosting ftp and other features of running a website. Is there an alternative?What about setting up a blog instead where you don't have to pay for hosting or learn ftp, register a domain and the other headaches of running a site? That's possible by running a free blog at blogger owned by google.One advantage of this is that these blogs also get picked up quickly by the search engines as well as get traffic from people who like to click the next button at blogger.What would you put on your blog? You can put up a little about yourself so your customers get to know you. Another thing is to post your specials of the week or have a diary explaining things. For instance if you run a pet store you can discuss grooming of dogs or what a healthy diet is for a cat. If you are chiropractor you can discuss common back problems and how one can try to prevent further injuries.Blogs can be used for educating your customers or clients and for helping them learn more about your services as well as your personality. People are curious about the person who runs a shop or company so let them see a bit of your background and history too if you feel comfortable doing that.You no longer have to feel intimidated about getting yourself published on the internet nor worry about paying a designer. It's possible also to add a newsletter to your blog as well as paypal buttons for people to purchase online. Don't let fear block your desire to get your business or company on the world wide web.

Questions To Ask A Potential Web Designer

For an individual or a corporate to get due recognition and develop their business, they will need to let others know of their existence and what they do. This is possible either through PR activities or by creating a well planned out website.For a website, seeking the professional guidance is the ideal solution and some questions that needs to be asked of the potential web designer could be :1. ExperienceHow many years has the "web design" er been in this line of work? This will give an idea about aware he or she is of current advancements in the field, such as Ajax, table-less layouts and Web 2.0 design styles.2. Samples of their past workWhat are the sites they have created? Ask them for samples or URLs that you can take a look at to build confidence in their capabilities.Look for designs that are stylistically similar to what you have in your head. Even better, ask if the designer has ever done work in your particular industry.3. Industry exposureWhat kind of industries have they been involved with? Who are their clients?This is so you can judge their ability to understand your industry and create a site that will suit your needs.4. After sales serviceWhat kind of service do they offer clients once the site is up and running? Do they help in updating it if any changes need be made or in acquiring more web space and so on?5. Visibility through search enginesDo they help in getting your company website listed in search engines or provide a full search engine marketing service?Having a pretty website is all very well, but you need people to visit it. Ask the designers if this is something they have practical experience with.6. Copyright and security issuesWill they make sure that the data and images used on the site are copyrighted and protected so others cannot copy them? And the security settings which will be useful while monitoring the traffic.Also, try to ensure that you have details of where they have licensed images and photographs from. This may save you problems in the future.7. DurationHow much time will they require to do the design, layout, and upload the same? This will give you good insight into whether they are efficient or not. A good web designer should not take more than a month, but this also depends on the time dedicated by the client.8. Fees and chargesWhile hosting your site on a domain, you need to pay registration charges which will be a one time payment.What will the overall cost in designing a website, with say a minimum of about 5 pages and couple of interactive links? The base charges levied for such a site would be around 300-500 and every additional page will be an extra charge.Does the designers fee include designing, editing, and installing required software?9. Links and AnimationDo they also help incorporating links to other sites through this and putting in flash animation videos or pictures?10. Online shopping cartsFor companies looking to sell products and services online, check the designer's portfolio for examples of real, working ecommerce websites.11. OwnershipWho will own the design, logo, and images that have been used on the site? Make sure to let them know you will be the sole owner so that you can move the site to another host if necessary.

The Choice Of Printer Repair

Nothing is worse then going to print out an important document and finding that your printer has ceased to function. We all know the drill; were getting error messages left and right; over and over again we open up the machine and unleash the many hidden compartments looking for a jammed piece of a paper or anything that will clue us in to the problem. And when were at our wits end we know that its time to make the call for printer repair.Printer repair is a difficult choice to weigh, simply because the affordable prices of printers makes the purchase of a new one over the repair of an old one sometimes easier and less expensive. Deciding on printer repair depends largely on the component that has stopped functioning. If youre dealing with a paper jam you just cant seem to solve, then, chances are, a printer repair professional can eradicate the problem very quickly and at very little cost.If youve had ongoing problems with your printer and the repair bills have continued to mount, then it may be wise to skip the printer repair going forward and purchase a newer printer with a warranty. A printer repair warranty would essentially alleviate the worry over a printer breakdown, as parts and, in many a case, labor is covered under the warranty contract.If you have to send your printer out for printer repair then turn to the manufacturer first and foremost. A printer manufacturer has a vested interest in upholding the reputation of its products. You will often find printer repair professionals who offer a superior level of service; and you can rest assured that the replacement parts you are receiving if necessary are in line with the manufacturers standards.Some large office equipment supply stores also offer printer repair but be sure that youre dealing with a reputable organization that will give you the same quality parts that you purchased initially. There are also private companies that offer printer repair; in some cases they will come to your office and work on the printer there. Weigh price considerations when determining the best printer repair as well; some of these smaller companies offer more competitive rates than the big guys, although you want to ensure that youre getting the same level of quality work.When it comes to printer repair, you must first determine the wisdom of repair versus the purchase of a new machine. If printer repair is the way to go, then be sure you are comparing apples with apples when considering several different companies.

Summary

What is a raid setup on a computer system?Like anything else it depends who you talk to.Raid hard drive systems had their acronym explained as Redundant Array of Individual Drives and Redundant Array of Inexpensive Drives. The acronym for this is the shortened term RAID.Capacity, reliability and performance are all important for file servers or other computer systems when you are storing large or very important files.It is often said that It is not if ...