While surfing around looking for web sites to exchange link I found some of webmasters doing bad thing to their link partner. One example is to add the directory where those links are located in disallow line in “robots.txt”.

What exactly the webmaster want to do? Actually, the webmaster restrict any search engine’s robot from crawling into the directory, in this case ‘linkbuilder’ directory. If you have exchange link with this web site, the spider will not see your link on the page, so it contribute nothing to you PageRank. Obviously, your web page has a link to this web site (because you exchange link with him) and the spider see it. Your web page give a point to the web site, but the website give nothing to yours. As a result the PR of the web site will increase, but your web site’s PageRank will go down.

Another way of link exchange’s scam is to make your link hidden from search engines’ spiders. The link can be hidden by putting it inside javascript, redirect it to a php or asp process page, instead of plain ‘a href’ HTML code. Using CSS (cascading style sheets) also can trick your eye, which make link appear to be correct, but in fact it is redirected to another way around before it go to your web site.

Meta Tag also can be use by selfish web masters to hide link. Actually it is not hide link, but instruct the search engines’ spiders to ignore any link on the page. So the spiders will not consider the link as a point of importance of other page. The meta tag use for this action is “nofollow”.

As a way of precaution to increase your link popularity (and PageRank) by link exchange is you have to make sure:

1. The directory which the link is located is not restricted to any spider (robot). On the web browser’s address bar type http://www.websitetocheck.com/robots.txt. Check the restricted directory.

2. Always check the source code, make sure the link is directly pointing to your web site by ‘a href=’http://www.yourwebsite.com’

3. Check those links in weekly or monthly basis, if the link which is pointing to your web site is missing, delete their link on your web site.

4. Check the meta tag of the page and try to find ‘ meta name=”robots” content=”nofollow” ‘

Hard drives put data wherever there’s a physical space on any of the platters that’s large enough to hold the binary in question. Once the data is thin down into small chunks called blocks, the file system (like FAT32 or NTFS) records where those blocks have been placed, and should they get shuffled around, where they have gone.<br />

It’s easiest to imagine that a hard drive is a big filing locker with a master index on the side that lists where every page of every document is stored. A hard drive might not put all the pages in the same drawer, but instead you can read the index and see what drawer each page is saved in.<br />

Unlike traditional platters which are, when compared to flash memory, extremely slow due to their mechanical nature, solid-state disks use NAND flash memory to store information. SSDs feature very fast burst read/write speeds, which are periods of disk activity that are much faster than normal due to data being physically close and easy to recover. On the other hand, they are slower than today’s hard drives for writing progressive bunches of information, a process recognized as sequential writes. Though, due to the nature of a user’s interaction with their PC, a majority of the accessing done on a hard drive is data reading, which SSDs are twice (Or more) as fast at as traditional hard disks.<br />

Also, due to a complete absence of moving parts, SSDs have greatly increased longevity and reliability. The downside to these drives, despite all their amazing benefits, are very high cost per megabyte of capacity, and their low capacity. It is unfortunate that both these traits are what will really stop a consumer from adopting a technology that is superior. There can be no doubt that SSD is the future, but that future is assuredly not now. However, in light of the low capacities and high prices, the technology still has enough merit to be featured in new notebooks arriving in 2007. Reduced power consumption, reduced heat and a long battery life spells great success for this technology in the mobile arena.<br />

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