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ISecureDat provides several backup types for your data files.
Select the one you feel best suites your needs.
Incremental:
This backup method is recommended for general files and Exchange Server Data (Mailboxes).
This system does a full backup the first time it runs and then backs up only new files.
Entire files will be backed up which have been modified since the last backup. Then, after
they are backed up, the files will be marked on the disk as having been backed up. This is
often the default and most widely-used method of backing up data files.
Differential:
Entire files will be backed up which have been modified since the last backup, the same as
incremental. However, after the files are backed up, they will not be marked as having been
backed up. The reason for this option is in case you also want to do tape backups as well
as remote backups. Since your tape backup software relies on the marks placed on the files
to determine which files need to be backed up, you don't want marks added before the
tape backups are made.
All plans are initially set to provide a BitBack backup. If you actually require a
differential backup for the reasons stated above, simply select the option on the
"specification" page.
Full:
Entire files will be backed up regardless of whether they have been changed or not since
their last backup. This is the least-used option because it results in the largest backup
sets and the longest on-line times.
BitBackup:
BitBackup is considered a special form of incremental backup. The first time that a
BitBackup set is executed all files in the selection list are backed up - irrespective of
the archive flag on the files. However, in subsequent runs, only files which change (as
indicated by the file archive flag) are backed up.
This option creates sub-file or "patch" backups which creates the smallest backup
and takes the least amount of time. It is the recommended default setting for large files
such as databases, Outlook personal storage files (PST files - email), large documents and
any other data files which change only modestly each day. These are all ideal candidates
for a BitBackup.
Warning: Due to disk cache requirements, use of the BitBackup feature on PCs with
less than 5 GB of free disk storage is not recommended. Keep in mind that the requirements
for local storage typically requires one-and-half times the disk space as the original data
size. If the total size comes to 10 GB, be sure to have at lease 15 GB of free space for
the local store.
This is the recommended backup method used for SQL Server (databases). go here for a more detailed understanding of how BitBackup works
(PDF).
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