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84ghd hair03 tory burch sale Understanding of tape backup capac
Understanding of tape backup capacity and data compression

What is a backup tape drive capacity:

about capacity, generally referenced two numbers: the machine capacity and compressed capacity. The machine capacity is the tape of the The machine capacity is the end user does not use any compression capacity is expected to be received is expected to use data compression should be the minimum capacity. Compressed capacity assuming 2:1 compression ratio (twice the amount of space to store the same information) case, the machine capacity is multiplied by 2. Remember that, absolutely no guarantee that the compression ratio is 2:1,tory burch sale, because the data on each computer is different, it may also be 1.1:1 to 3:1. 2:1 standard is based on

Second, how the data compression:

data compression is to observe the large amount of data, to understand how many of them repeat,Tory Burch Sales 9ePzdiscount tory burch flip flop,Tory Burch outlet, repeat the part of all shorthand ways to reduce the total by the amount of data. After all, human beings do, even without consideration.



For example,scarpe mbt, the picture above you do not say: orange, point 6 is blue, Compressibility of the data is very high.



Now, if you encounter this situation: point 1 is red, point 2 is orange, red point 3, point 4 is blue, point 5 is black, point 6 is yellow. In this case, to shorten the sentence, we can only say: The same thing appears in the DLT drive,polo outlet, data compression, some of the highly compressible data, part of the data simply can not be compressed.

three backups,Tory Burch 9jRu tory burch sample sale,satchel bag,Tory Burch Reva Sale, for the compressed data, should be avoided enable hardware / software compression:

data is compressed, any attempts to further its attempt to compress all futile useless. Unless the data is compressed using the compression algorithm of the poor. Since most of today's compression algorithms have the same efficiency, thus re-compressing the compressed data is not a good idea. Said re-compressed data is not good for two reasons: (1) to compress a waste of time and processor power,Tory Burch Shoes, (2) In fact, the final result has the potential to become more rather than decrease. Compression requires a small amount of overhead,Tory Burch On Sale 7aFDHow ought bring mbt Shoes S, which means that if the recompression operation can not compress data,Tory Burch Sales, the size of the final result is not the size of the compressed data size with compression overhead. So do the amount of data actually larger than the size of the uncompressed data size.

compressed data backup guiding principles:

· do not open at the same hardware and software compression.

· mainly if the backup ZIP or other compressed file, do not open the hardware or software compression.

· unless you are sure the compressed volume is turned off, or if the backup Novell 4.x or above the data, do not open the hardware or software compression. Note: NOVELL

4.x and later used by default during installation, the compressed volume.
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