Select drive or volume to scan

As used in Data Rescue, the term “drive” refers to a whole device, for example an IDE or Firewire disk drive.  A “volume” is a logical part of a drive.  A drive may be partitioned into multiple volumes, or it may contain only one volume – this is determined when the drive was originally configured.  The next figure depicts the storage space available on two disk drives.  The first drive has most of its space allocated to a single volume.  The second has most of its space split between two volumes.

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Figure 6: Drives and Volumes

Each volume resides in a partition of the drive.  Stored within a volume are that volume’s name and all its files, folders, and catalog structures.  The files and folders on a volume are all defined relative to the beginning of that volume on the drive.

In normal Macintosh operation, the user will see on his desktop an icon for each volume, labeled with the volume’s name.  These are names that may be specified or changed by the user; names like “Macintosh HD”, or “My backup disk”, etc.  The drive itself also has a name, defined by the drive manufacturer; names like “IBM-DTLA-307045 Media”, “DMI MAXTOR 6Y060L0 Media”, etc.  In normal Macintosh use the user doesn’t see drive names – only the volume names.  However you will see both when you use Data Rescue, so you need to be aware of them.

Select the drive or volume to be scanned from the list below.