To do a backup to a hard drive, you have two options: either backup to a
file backup set stored on the hard drive or do a Duplicate of your source
hard drive to your backup hard drive.

A file backup set is a single file which contains all the files you have
backed up, and that can be stored on any random access device. Like tape or
disk backup sets, you do standard incremental backups to it and it supports
software data compression. The drawback to a file backup set stored on a
hard drive is that hard drives are not removable media and cannot be stored
off-site for safe-keeping. Also, a file backup set is limited to the maximum
Macintosh file size in OS 8.6 and earlier, which is 2 GB. (File backup sets
in Retrospect for Windows are limited to the file size limit of the drive
the file is stored on, according to the file system. For example, FAT32's
limit is 4 GB, etc.)

To do a backup to a file backup set, simply create a new backup set when
asked to choose one in either the Immediate Backup or script edit window.
>From the popup menu at the top of the backup set creation window, choose
Macintosh File (or just File in Windows). Name the backup set, click New,
and save it on your external hard drive. Make sure your listed backup
destination is the newly-created backup set and then commence the backup.

The other option you have is to do a Duplicate. Following is some basic
information on a Retrospect Duplicate.

What is the difference between backups and Duplicate?

* Backups copy files in a proprietary format only accessible using
Retrospect. Duplicate copies files in standard file format so they can be
opened or used right on the backup disk without having to go through

* Backups can employ compression whereas Duplicate cannot.

* Backups can save old data incrementally so files deleted from the source
are still available in the backup. Duplicate basically keeps a mirror image
of the source so each Duplicate operation destroys previous data and only
retains the current files.

* Duplicates do not retain file sharing or AppleShare privileges.

* Backups can span multiple pieces of media. Duplicates are always a
one-to-one operation; one volume is duplicated to one volume. If you have
multiple volumes to duplicate you will have to define subvolumes on the
destination volume and create multiple scripts for each duplicate operation.

How do you do a Duplicate?

(This can be done manually or with a script).

1. Immediate > Duplicate.
2. Select the hard drive or folder you want copied.
3. Select the hard drive you want to store your data on.
4. Make any necessary changes in options or in what files you want copied
and click Duplicate. It's that simple.

Subsequent Duplicate operations will be incremental, copying and replacing
files that have been modified or are new.

What is the difference between "Replace entire disk" versus "Replace
corresponding files"? (This option is available in the Destination Selection

Replace entire disk will make the destination drive look exactly like the
source drive you are backing up. Any files on the destination drive that is
not on the source drive will be deleted. Use this judiciously.

Replace corresponding files will copy over all files on the source disk to
the destination disk but will not delete files on the destination disk that
are not on the source disk. So new files on the destination disk will not be
touched but corresponding files, even if newer on the destination disk, will
be replaced by the source disk files.

As always, call us if you have questions.


Matthew Tevenan
Technical Support Specialist
Dantz Development Corporation

> From: "Garret J. Cleversley" <[EMAIL PROTECTED]>
> Reply-To: "retro-talk" <[EMAIL PROTECTED]>
> Date: Wed, 05 Jan 2000 07:14:16 -0400
> To: retrospect <[EMAIL PROTECTED]>
> Subject: Backup to Hardrive
> Here's a dumb one. I wanted to back up my network boot drives with a script
> directly to a hard drive on my server. However when I was setting up the
> backup set it doesn't give me the option to select the hard drive. Do I need
> to run a different operation like duplicate drive or something like that
> instead?
> g
> --
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