Advanced Compression Options

Advanced Compression Options

Assorted options are available on the Advanced page of Compression options.

To access the options on the Advanced page:

1.  Select Options from the Application Menu.

2.  Select the Compression category.

3.  Select the Advanced page.

 

To determine how an archive is dated when it is saved:

Select one of the following options from the Archive date drop-down menu:

SettingWhat It Does

Today's date

Gives the archive the current system date and time

Newest file date

Gives the archive the date and time of the newest file in the archive

Oldest file date

Gives the archive the date and time of the oldest file in the archive

Retain original date

Does not change the archive's date

To split an archive into multiple segments of a specified size:

Select or enter a size for the segment files in the Split size drop-down menu.

The default Auto-Detect setting automatically breaks an archive into segments if you are storing an archive onto removable media, such as floppy disks, or if the destination drive lacks space to store the archive in one piece. Segment files can be as small as 64 KB and as large as 4,928,256KB.

The setting Do not span ensures that an archive is never segmented. The archive is created only if the target location has enough space to store it.

See here for more information about saving an archive in segments.

To set whether to format or erase floppy diskettes before writing an archive to them:

Select one of the following settings from the Diskette format drop-down menu:

SettingWhat It Does

None

Diskettes are not formatted or erased before saving the archive to them. Any files already on the diskette are left there.

Format

Diskettes are formatted before the archive is written to them. Formatting destroys all files on a disk and redraws the sector boundaries that define low-level storage locations. Formatting a disk requires a minute or so to do. If this option is set and an archive spans multiple disks, Smartcrypt formats each disk before writing to it.

Quick

Quick-formats diskettes; re-initializes FAT tables and clears the diskette root directory

Wipe

Deletes all files and directories. Wipe is faster than Quick if the diskette contains only a few files and no subdirectories—for example, if you are reusing a diskette containing only a segment (one file) of an archive split across multiple diskettes.

To convert characters used to mark line endings in ASCII text files to conform to the conventions of a different platform:

Select the style of line ending you want from the End of line drop-down menu:

SettingDescription

None - no conversion

The default. In general, use this setting when extracting files to use on Windows from an archive created on Windows.

DOS/Windows - CR/LF

Substitute the line endings used on DOS and Windows

Mac - CR

Substitute the line endings used on the "classic" Macintosh operating system

Unix - LF

Substitute the line endings used on the UNIX, Linux and Mac OS X operating systems

Note: Different platforms use different characters to mark line endings in ASCII text files (.txt, .htm, and other kinds of files that are not binary files). If the line endings for an ASCII file are wrong for your system, it can affect the display and printing of the file.

Smartcrypt substitutes the specified line endings only for files internally flagged as ASCII files in the archive. Smartcrypt flags ASCII files as such when adding them to an archive, but other compression programs may not. As a result, if the archive was not created using Smartcrypt, it is possible that line endings for ASCII files in the archive will not be converted as specified.

To convert long file names to short file names for files that are added:

Select one of the following settings from the File name conversion drop-down menu:

SettingWhat It Does

No conversion

Adds files using exactly the names they have

Convert to DOS 8.3

Uses DOS conventions to convert long file names to file names having eight characters before the dot and three characters after

Convert to OS/2 8.3

Uses OS/2 conventions to convert long file names to file names having eight characters before the dot and three characters after

To determine what to do with open files:

If a file set for compression is currently open, select one of the following actions from the Open Files drop-down menu:

SettingWhat It Does

Skip

Do not include in archive

Prompt

Ask what to do with this file

Add

Include in archive, Be aware that, depending on the file type and the application,  unsaved data in an open file may not be included in the archive.

To turn off specified file attribute settings for added files:

In the Preserve file attributes group, clear the check box of any attribute type that you want to turn off.

For any attribute box that is checked, Smartcrypt saves the setting—on or off—of that attribute for added files.

The check boxes  in the Other options group control these options:

SettingWhat It Does

Auto Save

Turns on Auto-Save to save changes to archives automatically. Clear to save archives manually.

Store file times

Check to store NTFS Created, Modified, and Accessed date/times. clear to store only Modified date/times.

Use PKZIP 2.04 limitations

Stores the archive so that its files can be extracted using PKZIP version 2.04, a very early version.

This setting disables other options that are incompatible with it, such as strong encryption.

This setting can result in slightly larger ZIP files and limits to 16,383 the number of files that an archive can contain.

Store file names and comments in UTF-8 format

Enables international characters in file names and file comments to display correctly when an archive's contents are viewed or extracted in compatible non-UTF-8 locales.

For example, with the UTF-8 option turned on, you can archive files in a Japanese locale that uses the EUC character set and then correctly view or extract the files in a Japanese locale that uses the Shift-JIS character set. Similarly, you can archive files on a Japanese system using Japanese file names and restore the file names correctly when extracting onto an English system.

If an archive is modified in any way with the UTF-8 option turned on, UTF-8 characters are used in the names of all files in the archive.

In general, use the UTF-8 option when you archive files that contain international (that is, non-English) characters in file names or file comments.

The UTF-8 option and the option Use PKZIP 2.04 limitations (see above) are incompatible and cannot be used together.

Smartcrypt, SecureZIP Server version 8.6 (or later) or SecureZIP for Windows version 11 (or later) is required to extract files added with the UTF-8 option, so use the option only with archives that you expect to be extracted with these (or later) versions of these programs.

Store alternate streams

Keeps any alternate data streams included with the archive. This setting does not affect zone identifier information included by Internet Explorer; this stream is always stored.