English
Russian
GermanRise of information capacity HDD (the Part III)
Evgenie Rudometov, Victor Rudometov.
authors@rudometov.com
Practically all users are familiar with a problem of unsufficiency of information capacity of hard disks. This problem in many cases can be weakened by means of various software of compression of the information without acquisition of the additional equipment. As such resources the archivers which are carrying out at the command of the user effective compression of the information can be used. However at all of them advantages quite often considerably it is more convenient to use the resources of dynamic compression which are carrying out the extension of an information field of hard disks in an automode. Of some features of some resources of dynamic compression of the information, Windows used in the environment of popular operating systems, the substance offered more low is devoted a choice, customisation and the analysis.
Part III, last
In the previous part of article procedure of compression of the information on the hard disks which are a part of computers, in the environment of operating systems of Windows NT 4.0 and Windows 2000 was described at usage of standard graphic interfaces.
In this, last, article parts will be considered features of customisation of modes of dynamic compression by command line resources, and also efficiency of a compression by program DriveSpace 3 and the built in resources of file system NTFS is parsed .
In the Conclusion totals are presented and some results of usage of dynamic compression are resulted.
Command line method
In operating systems of Windows NT 4.0 and Windows 2000, received a wide circulation among users of personal computers, compression of program objects from the command line is provided. It is carried out by means of special compact command. Syntax of this command is identical to both mentioned operating systems. Distinction consists only in used terms: Windows NT 4.0 — directories, and in Windows 2000 — folders:
Review and change of parametres of file compression on sections NTFS.
COMPACT [/C |/U] [/S [:каталог]] [/A] [/I] [/F] [/Q] [imjafajla [...]]
/C Compression of the selected files. Directories are labelled so that files added later also have been compressed.
/U Expansion of the selected compressed files. Directories are labelled so that files added later have not been compressed.
/S Performance of the specified operation over files in the selected directory and all its subdirectories. The current directory by default uses.
/A Mapping of files with attributes "hidden" and "system". By default these files are skipped.
/I Continuation of performance of the specified operation even after occurrence of errors. By default performance of program COMPACT interrupts at error occurrence.
/F Compulsory compression of all selected files even if some of them are already compressed. By default compressed files are skipped.
/Q Output only the most essential data.
imjafajla
The template of names of files, filename or directory name.
By call without parametres program COMPACT displays a state
Compression for the current directory and all files containing in it.
Input of several names of files or wildcards is admitted.
If some parametres are specified, they are divided by blanks.
Examples of operation with this command (Windows NT 4.0) are more low presented .
- Activation of compact command in the usual not compressed directory:
- Compression — call with kljuchem/c:
- Activation compact in a directory with compressed files:
- Dekompressija — call with kljuchem/e:
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G:\TEXT\BOOK\PROG\C\Builder\Documentation \> compact Review of directory G:\TEXT\BOOK\PROG\C\Builder\Documentation\ The new files added in this directory, will be compressed. 16874446: 16874446 = 1,0 to 1 DG.PDF 14156631: 14156631 = 1,0 to 1 QS.PDF In total files: 2, directories: 1. From them it is compressed: 0, it is not compressed: 2. 31 031 077 byte given in the size are saved in 31 031 077 byte. Degree of compression 1,0 to 1. |
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G:\TEXT\BOOK\PROG\C\Builder\Documentation \> compact/c Installation of a mode of compression of new files for directory G:\TEXT\BOOK\PROG\C\Builder\Documentation \[OK] File compression in G:\TEXT\BOOK\PROG\C\Builder\Documentation\ DG.PDF 16874446: 8966144 = 1,9 to 1 [OK] QS.PDF 14156631: 2811904 = 5,0 to 1 [OK] It is compressed files: 3, in directories: 2 31 031 077 byte given in the size are saved in 11 778 048 byte. Degree of compression 2,6 to 1. |
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G:\TEXT\BOOK\PROG\C\Builder\Documentation \> compact Review of directory G:\TEXT\BOOK\PROG\C\Builder\Documentation\ The new files added in this directory, will be compressed. 16874446: 8968192 = 1.9 to 1 C DG.PDF 14156631: 2811904 = 5.0 to 1 C QS.PDF In total files: 2, directories: 1. From them it is compressed: 2, it is not compressed: 0. 31,031,077 byte given in the size are saved in 11,780,096 byte. Degree of compression 2.6 to 1. |
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G:\TEXT\BOOK\PROG\C\Builder\Documentation \> compact/u Removal of a mode of compression of new files for directory G:\TEXT\BOOK\PROG\C\Builder\Documentation \[OK] Expansion of compressed files in G:\TEXT\BOOK\PROG\C\Builder\Documentation\ DG.PDF [OK] QS.PDF [OK] It is developed compressed files: 3, in directories: 2. |
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