Novell Operating System - Recovery of Compressed Data

 


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Problem Description

Data stored in a working Novell server is automatically compressed to save space, and is obviously decompressed before it is displayed to a user. Phoenix Novell recovers lost data exactly as it was stored in the hard disk, and the recovered data may be compressed. This gives rise to the problem of recovered data being unusable (because it is in a compressed format).

Phoenix, however, has a new and advanced uncompression engine that is able to decompress recovered data.

Technical Aspect of the Problem

Data Compression refers to the process of storing data in a format that requires less space than usual. Compressing data is the same as packing data – reducing the amount of electronic ‘space’ data takes up, and compressed data usually consumes 2 to 4 times fewer bits. Typically, it is infrequently used data which is compressed to save space.

Methods of compressing data include replacing blank spaces with a character count, or replacing redundant data with shorter stand-in ‘codes’. No matter how data is compressed, it must be decompressed before it can be used. This is precisely where the problem lies – recovered data may be in a compressed format and thus unusable. Phoenix uses its own uncompression module to resolve this problem.

Technical Aspect of the Solution

Data recovered from a failed server may not open because it is in a compressed format. The solution to this problem needs to be followed in a systematic way for best results.

First, the hard disk containing the recovered compressed data is to be attached to a working Novell client machine and the compressed data is to be transferred from there to a working Novell server. The hard disk of the server (which now contains the compressed data) is then taken out and attached as a secondary disk to any machine with Phoenix Novell installed in it.

Phoenix then decompresses the required data, after which the hard disk (now containing the decompressed data) is to be reattached to the server. The data can then safely be transferred from the server back to a working Novell client machine.

Working of Phoenix Novell - Data Recovery Software

Compressed data can be decompressed using Phoenix Novell’s uncompression utility. The recovered compressed data is to be transferred from a Novell client machine to a Novell server. The hard disk of the server (which now contains the compressed data) is then to be attached to a machine with Phoenix Novell installed in it. The Phoenix Novell software is then used to decompress this data in a few short steps.

First, select the volume which contains the compressed data. Phoenix Novell analyses the selected volume and displays the result in an easy to understand structure. Select all the files that are in a compressed format.

Finally, click Tools -> Mark Compressed Files to start the decompression. Phoenix then decompresses all the compressed data. The server hard disk now contains decompressed data and can be reattached to the server to transfer all the decompressed data back into the client machine.

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