When writing to the media, can encryption have an effect on compressio

1.	When writing to the media, can encryption have an effect on compression?
Answer» Yes, data is effectively randomised when backup procedures are PERFORMED using encryption. This means that while compressing encrypted data, compression METHODS will be less effective. As a result, there will be a visible DIFFERENCE in the compression ratio when this data is written to the media. For example, a tape with a native capacity of 110GB that was formerly compressed to 190GB may now only be able to write 124GB to the same tape when encryption is used. The amount of data that can be written to tape depends on the type of data that is being written. Image files will not be compressed because they are already compressed, however, a TXT file will be compressed heavily.

When writing to the media, can encryption have an effect on compression?

Answer»

Yes, data is effectively randomised when backup procedures are PERFORMED using encryption. This means that while compressing encrypted data, compression METHODS will be less effective. As a result, there will be a visible DIFFERENCE in the compression ratio when this data is written to the media.

For example, a tape with a native capacity of 110GB that was formerly compressed to 190GB may now only be able to write 124GB to the same tape when encryption is used. The amount of data that can be written to tape depends on the type of data that is being written. Image files will not be compressed because they are already compressed, however, a TXT file will be compressed heavily.

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