Using Redundant Array of Independent Disks technology can improve the performance of your storage, offering both speed and reliability benefits. Monitoring the speed of your RAID setup is important, enabling you to see whether your storage is underperforming and helping you to identify when it is time for an upgrade. RAID speeds are measured using benchmarking software, which test how long it takes the RAID array to perform a series of tasks....

Old-style TV sets and other electrical products made between the 1930s and 1970s contain vacuum tubes for creating, amplifying and modifying electrical signals. The tubes function by controlling the electron movement in a low pressure environment, such as low pressure gas or in a vacuum. A vacuum tube consists of a glass – sometimes metal or ceramic – tubular envelope with electrodes contained in a vacuum atmosphere. To test a vacuum tube use one of the many vacuum testers available on the market....

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One of the biggest advantages of using Microsoft Excel is the ability to work with so many different types of files. Excel users can import documents from a variety of programs and formats, including CSV (Comma Separated Values), rich text files and other text files created in DOS. After those files are imported, you can sort, filter and use them the same as any other Excel spreadsheet. Writer Bio

The VDO speedometer interfaces with the gauges and senders of your vehicle in order to properly display speed. You can determine any problems with your speedometer using an ohm meter. When using an ohm meter you work with electric parts. To keep yourself safe during this task, wear rubber-soled shoes and double check each wire you intend to touch before you touch it. Keep your engine off during the process....

Brother manufactures all-in-one printers, which feature built-in scanners. These devices enable you to scan images and documents and save them onto your computer’s hard drive. At times, you may run into problems using your Brother scanner. For instance, you may receive error messages that prevent the scanner from functioning. But many of these issues can be solved using a variety of troubleshooting techniques. Writer Bio

The Sitronix multimedia photo viewer, also known as the S-Viewer, is a key-chain sized USB device that you can use to view photos. It offers you a 0.95-inch to 3.2-inch display size screen. You may also use this device to store multimedia photos. Occasionally, you may encounter issues with your S-Viewer, such as the device not powering up or not being able to display the photos properly. You may follow certain troubleshooting techniques to resolve such issues....

The recession and rising costs of utilities and basic necessities forced people to look for smart ways to save money. One way was to switch from standard contract wireless phones to pay-as-you-go phones, also known as prepaid phones. Using a pay-as-you-go cell phone enables you to better control the amount you spend on phone calls or text messaging. There are hundreds of plans to choose from to fit your needs and budget....

Bluetooth connectivity allows devices to interact and share information wirelessly through individual connections. Although not all printers come with Bluetooth technology built in, any printer can take advantage of Bluetooth connectivity using a Bluetooth adapter. These small additions to the printer’s hardware connect without installation and broadcast the printer to Bluetooth-enabled computers and other devices. Use a Bluetooth adapter to connect a printer to multiple computers, or simply reduce the cord clutter around a workspace....

The webcam light located at the top of the screen on every MacBook Air and MacBook Pro comes on whenever an application activates the FaceTime camera beside it. Macs don’t have a control to turn off the webcam light without turning off the webcam as well. To turn off this light, you must deactivate the webcam using the application’s controls or quit the application using the webcam. The location of the controls vary with every app....

Updated September 15, 2017 Close AutoCAD 2007. To disable the write protection on the file you’re working with, the file can’t currently be being accessed by the AutoCAD 2007 software. Locate the original file on your hard drive. If you know exactly which folder it is stored in, navigate to that folder. If you don’t know the folder location but you know the name, click “Start” and type its name into the “Search” box....

Verizon offers its wireless and landline customers the option to block specific numbers from being able to ring through to their telephones for privacy reasons. Blocks can be removed from your wireless or landline account at any time. Wireless customers can unblock numbers through their My Verizon online customer home page, and landline customers can do so through a series of touchtone options. Tips Writer Bio

If you can’t remember the passcode, pattern or PIN you created to lock your Android device, you can bypass the security mechanism and regain access to your smartphone or tablet by entering your Gmail credentials. If you forget the username or password of your Gmail account as well, however, your only other alternatives are to reset your Motorola device or try to retrieve your login details from Google directly. If you provided Gmail with an alternate email address when signing up or have access to the original device on which you set up your account, you may be able to obtain the information you need....

Windows Vista is an operating system developed by Microsoft that is the successor of Windows XP and the predecessor to Windows 7. One of Vista’s security features is that it requires a password to enter a specific user’s desktop. If you have forgotten your password and are locked out of your Dell computer, there are ways to unlock it. Writer Bio

Your laptop features a Wi-Fi adapter that lets the computer communicate with a wireless router or other access point. Embedded in the adapter are antennas that send and receive data packets in the form of radio signals. Windows supports several methods to turn the antennas on or off, and when the antennas are disabled, the laptop can’t intercept wireless signals in the area. If no local hot spots appear when you open the Network pane, alter your computer settings to re-enable Wi-Fi communication....

Zip files are files that have been compressed due to their size. This can help when you need to download a large number for files for an application or even a game. Zipping them makes it smaller and more compatible with computer storage limits. Both Windows Vista and later as well as Mac Tiger OS X and later have built-in utilities to unzip Mac files without having to download any additional software....

The nüvi 750 is a discontinued model in Garmin’s nüvi 700 series, currently replaced (as of 2010) by models 755/755T. It came preloaded with detailed street maps for North America, which include points of interest (POIs) such as local attractions, hotels, shopping, restaurants, fueling stations, and ATMs. Garmin sells a variety of updates and additional maps, including city maps for Europe, topographical maps, and trail maps. Tips Warnings Writer Bio

To upload images onto Google Image Search your image must be placed on a website or blog with relevant keywords. Google is a search engine and it searches websites and blogs to identify images it can upload to Google Images. No one is allowed to upload their images directly to Google Images since Google controls what and when images are loaded. To encourage Google to upload your images, you can submit the website or blog using the Google Add URL link....

If you want a cellphone without the hassle of credit checks, deposits and lengthy contracts, consider a TracFone. TracFone is a prepaid mobile phone provider that allows customers to add airtime to their account by purchasing prepaid cards, logging on to the website or even directly from a TracFone handset without having a monthly recurring bill. If you prefer to have your minutes renewed automatically each month, TracFone offers value packages that bill automatically and can be canceled at any time....

Your HP System Recovery Disc allow you to recover your HP computer to factory default conditions, should you incur irreparable damage to your operating system. HP designed the recovery disc to be bootable, which means your computer will run directly from the disc without requiring an intact operating system to access it. Once booted, the recovery disk guides you step-by-step during backup or recovery. Writer Bio