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The Comparison Criteria window contains special settings for advanced file comparison.
There is a list of quick sets to choose for predefined comparison criteria:
| · | None - if this is selected, a warning window is shown asking you to confirm if you want the Date modified criteria disabled or not. If this criteria is disabled, Backup4all will only backup files that have the size changed. |
Custom - this is the default option and has several important file properties and attributes selected as comparison criteria (Size, Date modified, Date created, Archived, Hidden, System, Read-Only).
| · | Archive attribute only - if this is selected, a warning window is shown asking you to confirm if you want the Date modified criteria disabled or not. If this criteria is disabled, Backup4all will only backup files that have the archive attribute changed. |
| · | FAT attributes - if this is selected, a set of File Allocation Table attributes will be used for comparison |
| · | NTFS attributes - if this is selected, a set of NTFS (New Technology File System) attributes will be used for comparison. Note that these attributes are available only on Windows NT, Windows 2000, Windows XP, Windows Server 2003 and Windows Vista. Windows version 95, 98, 98SE and ME, cannot natively read NTFS file systems, thus these attributes are disabled. |
Available file properties are:
| · | Size - file size (it is mandatory) |
| · | Date modified - the latest date and time when the file was modified (a warning message is displayed if you uncheck it) |
| · | Date created - the date and time when the file was created |
| · | CRC32 - the most comprehensive criteria because it calculates a checksum based on file contents and compares it with the checksum from the backup (this slows the process) |
Available file attributes are:
| · | Read-Only - file can be read, but not modified or deleted |
| · | Archived (unavailable when the Clear archive bit option is checked from the Backup Properties->Type window) - file attribute used for backup. When a file is created, the archive bit is turned on. When a backup program copies the file, it turns off the archive attribute. |
| · | Hidden - files marked Hidden do not normally display unless the file manager option to display them is selected |
| · | System - files marked System do not normally display unless the file manager option to display them is selected |
| · | Compressed (only NTFS) - file that is made generally much smaller than the original size of file. Decompression occurs automatically when the file is read. The file is compressed again when it is closed or saved. |
| · | Temporary (only NTFS) - the file is being used for temporary storage. |
| · | Encrypted (only NTFS) - file is encrypted on a NTFS volume to protect it from unauthorized access |
| · | Not indexed (only NTFS) - file not indexed by the content indexing service |
| · | Offline (only NTFS) - content of the file is not immediately available. This attribute indicates that the file data has been physically moved to an offline storage. |
| · | Reparse point (only NTFS) - reparse points are used as building blocks by Microsoft and third-parties to enhance NTFS file system behavior. |
| · | Sparse file (only NTFS) - in a sparse file, large ranges of zeroes may not require disk allocation. Space for nonzero data will be allocated as needed as the file is written. |
If you select more than one attribute, Backup4all will consider the file for backup if any of the attributes selected is changed.
Related Topics:
New Backup Wizard and Backup Properties - Advanced
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