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The Data Compression Book

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Data compression is the process in which big files are turned into smaller files. For example a large Word document is compressed to a smaller archive file like Zip or 7Z. To some data compression looks like magic.

Data compression is not magic but an algorithmic process in which the same data is represented in a more efficient way. Actually one way to look at data compression is as data redundancy. In other words instead of thinking that the compressed file is smaller than the original data file think of the compressed file as the original file and the bigger data file as a very in efficient representation of it.

For example lets say that you have a text file with this content the letter A then a thousand spaces and the letter B. The file would consume 1002 characters. This is however a very inefficient representation it would be much shorter to have a file with a content that says something like A then thousand spaces then B.

So why do computers store and use inefficient files at all? The reason is simple they are easier and faster to handle and process and when storage is not a problem there is no real disadvantage of storing bigger files. But when you need to backup file or for example send them over the Internet making them smaller is more efficient.

Compressing files is done by using one out of many what are knows as compression or archiving utilities. There are many compression algorithms that were developed each with its advantages and disadvantages. For example some compress files faster while some compress file slower but achieve higher compression ratio. Some compression types can compress and pack multiple files while some can work only on one file at a time. Some are better for certain file types for example some compression algorithms are optimized for multimedia files while others for textual documents. Some consume more memory in order to compress the data while others are slim and can run on resource limited computers.

Although there are many compression algorithms they all fall under two main categories. One is known as lossless compression and the other as lossy compression. The difference is in the ability to revert the compressed file into the original not compressed file and get the exact same data. Lossless compression means that if you compress a file into an archive and then decompress the archive you will get the exact same file. Lossy compression means that if you compress a file into an archive and then decompress the archive you will get a slightly different file. Why would you want lossy compression that does not revert to the same file? Because it can result in much higher compression ratio. For some type of files losing some data is not noticeable while the high compression ratio is a great advantage. An example for such files are pictures and videos. On the other hand lossless compression is a must when compression data files such as documents and spreadsheets.

The Data Compression Book

LTO ultrium tape leads the way as a high-speed, efficient and robust data storage media. LTO ultrium is a highly robust tape medium that is perfect for intensive backup & large scale data archiving. The compressed capacity range of the LTO tape versions starts from 200 GB of LTO-1 tape, and then goes up to 1.6TB in the LTO-4 tape format. In future this compressed capacity is planned to reach 3.2 TB. The track layout is optimized for faster access and massive storage capabilities. The upcoming fifth version LTO5 tape will offer remarkable 3.2 TB (compressed capacity).

Sony not only produces tape drives, but it is also manufacturer of tape media as well. Sony LTO tapes are developed to the highest quality standard to ensure massive storage, superior performance and compatibility. The Sony tape cartridges are completely compatible with all the LTO tape libraries and drives. WORM feature in LTO secures data archiving. Metal particle ? inch single tape reel technology is used in LTO format. The track layout is optimized for faster access and massive storage capabilities. The upcoming fifth version LTO5 tape will offer remarkable 3.2 TB (compressed capacity).

LTO ultrium features advance & innovative compression mechanism with the help of which the LTO tapes can backup data at remarkably high speeds and accuracy. Linear tape open offers faster access and transfer rates that range from compressed 40 MB/s in LTO-1 format to 240 MB/sec in the LTO 4 tape format. IC memory chip is incorporated in all the LTO tape cartridges. 4KB chip is included in LTO-1, LTO-2 and LTO-3 tape cartridges while LTO-4 tape cartridge has memory chip of 8KB. Information regarding media error, data performance and cartridge history are recorded on the memory chip. This information is very helpful in library environment as it enables faster cartridge and file access. Contact Tapebackup for ordering all brands of durable LTO data tapes.

Sony ultrium LTO tape has ultra thin coating boosts the recording density. LTO ultrium cartridge can hold the valuable information safely for more than thirty years. LTO technology can perform more than 1M passes. Sony LTO data tapes fulfill all the specifications of LTO. These tape cartridges are completely compatible with all the LTO tape libraries and drives. The cases of the LTO tapes are made transparent so that the barcode information could be easily identified. Each LTO tape cartridge has a separate cell that prevents and protects from any harm during shipping. Sony LTO tape's less packaging reduces waste and limits the consumption of energy. Sony LTO tapes offer labeling service that is helpful in automated systems as it makes identification of media easier and provides quick access to files. Therefore the Sony ultrium tapes save time and increases the backup efficiency.

WORM feature in LTO secures data archiving. LTO WORM media provides protection to the precious recorded information and prohibits alteration & accidental erasure. Advanced alloy metal coating is used in LTO media that delivers superior weather resistance and high output. Advanced alloy metal lowers the particle size variations and elevates the performance level. Groundbreaking orientation technology is featured in the Sony LTO tape that assures that the position of the particles is in same direction. The orientation technology minimizes the noise.

Contact Tape4backup and avail discount offers on IBM 95P4436 LTO-4, Maxell 183906 LTO-4, Sony LTO1 LTX100G, TDK D2406-LTO3-LBL, Dell 341-4647 and all tapes as well.

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Both Venderei Tikotzinski & Tape4backup are contributors for EditorialToday. The above articles have been edited for relevancy and timeliness. All write-ups, reviews, tips and guides published by EditorialToday.com and its partners or affiliates are for informational purposes only. They should not be used for any legal or any other type of advice. We do not endorse any author, contributor, writer or article posted by our team.

Venderei Tikotzinski has sinced written about articles on various topics from Software. Venderei Tikotzinski is a business and Internet writer. This article can be reprinted only if the resource box including the backlink is included. You can read more at

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