cedo510 class 4


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Slide 1

Boot Process Analysis Why do computers slow down?

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Boot Reboot Windows Boot & Reboot

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Boot Reboot Macintosh Boot & Reboot

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Averages… Average manufacture date: 2007 Range: 1996-2011 7 Mac’s, 20 PC’s (35% - 15-20% in the general computer user group, that’s my estimate) Windows 7 = 7, XP= 9, Vista = 3, Win95 = 1 Mac OS-X were all 10.4 – 10.6+ none were the latest version 10.7.1

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Why do computer slow down… Computers, PC’s and Macs to a lesser extent, slow down as we use them. We install software that wants to be available all the time so it loads itself into memory when the computer starts. If you don’t use it then its still there taking up time and memory. As you install and uninstall software it leaves remnants of itself around and this also slows things down. As some point you need to reinstall the OS.

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Ram vs Storage RAM - Random access memory is computer short term memory. It is what the computer uses while it is running. The more RAM the more it can process, to a point. It is really up to the processor and designer as to how many programs can run at a time and how the RAM is allocated. Storage is long term memory. It is the size of the hard drive or SSD drive. In the early days there were not hard drives, just small floppies.

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How Much Is Enough… We used to say that you could not have enough storage or memory but that may not be true. Take the IPAD, very little ram and a miniscule SSD, i.e. solid state drive. The processor is optimized to create the appearance of speed and the programs, apps are small. Data storage is minimal so the IPAD works. In keyboard computers the standard is 4GB of RAM. Some have less, others a bit more

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How Much Is Enough… Hard drives just keep getting bigger. First they were 20-80 Gigabytes (GB), then suddenly they were hundreds. Why? This is where we store our data. Pictures, documents, music what else. This is the stuff you value, that you think you will look at later. Articles and papers you have written, lesson plans, lecture notes… I have 450GB of music, 40 GB of pictures and 25 GB of general documents.

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Where will it end… I think it might be on the way down. i.e. I believe in the future people will save there docs online, or on a school or commercial server. If that is the case then computer hard drives will get smaller.

Slide 10

MacBook Air Perfect example is the MacBook Air. Light, small storage space and almost instant on. It is an internet machine. It is designed for cloud storage, its drive is too small to hold too much data.. It uses an SSD, or Solid State Drive. Flash memory. Flash memory is almost instant so the computer boots incredibly fast. This is the industry standard for light, lean and fast computing in the cloud era. But is is expensive.

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New Item: The UltraBook The PC versions of the MacBook Air are referred to as Ultrabooks. Light, less than three pounds. Fast startup because of SSD drive technology. Very little storage. Who needs it, everything is online now. There are ultrabooks from Acer, Asus, Apple and Lenovo, others will soon follow. They are pricey, about twice the cost of a regular notebook.

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My Favorite: Acer S3 Cold Boot in less than a minute (50 seconds) Restart in 50 seconds too. Best part is that in actual use, it has a sleep mode that starts up instantly. Close the top, it sleeps, open it and you are ready to compute. About 2 seconds to the screen and another 1 or 2 to grab the wireless signal. Never more than 5 seconds from open to the internet. Weight is 2.8 pounds.

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It is a Hybrid... It has a 20GB SSD and a 320 GB actual hard drive. It has 4GB or Ram and a special Intel processor that uses very little power. At least 4 hours on a charge but in actual usage I am getting closer to 5 hours. It goes to sleep and wakes up instantly to preserve the battery life. Much less money than a MacBook Air or any pure Ultrabook.

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Speed Demon is the IPAD The IPAD in general use it the winner, open the smart cover and it is on, internet and all. Close the smart cover and its off. (of course you can’t peek to see if it really works.) 8-10 hours on a charge. But is it a computer? It does computer things… it has almost no storage, that’s a theme, less ram, less storage = modern computer.

Tags: ced education john sklar

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