This information is usually backed up on the drive itself, in case the first copy becomes corrupted. This information also includes the exact physical locations (addresses) of the file data on the disk. The info about files and folders contains file records that store filenames, sizes, date/times, and other technical information. This is necessary for the computer to correctly find the necessary data on the partition. The disk service information shown in Figure 2 contains specific information about the partition size, file system type, etc. Figure 2: Logical disk structure Click image to enlarge This division of data from meta-data allows for better disk space management, faster file search and increased reliability.įigure 2 shows a typical logical disk structure. Similarly, each partition or logical disk is divided into two parts: one stores information about the disk (folder structure, file system, etc.) and the other stores the data that comprises those files. The hard drive service data and info about partition structure portion shown in Figure 1 is known as "meta-data." That is, information about the data on the disk (as opposed to the data itself). Figure 1: Hard drive structure Click image to enlarge This is usually referred to as a "partition table" or "partition map."Ī typical partition structure is shown in Figure 1. Information about the partitions on the disk is stored at the beginning of the hard drive.
DATA RESCUE 4 RECOVER FILE TYPES WINDOWS
For example, a physical hard drive for a Windows system may contain two logical disks: one NTFS and another FAT32. Each partition has its own file system type, independent from other partitions on the same physical disk. In the DOS/Windows-based OS families, these partitions are called "logical disks." Logical disks are assigned drive letters and optional descriptive labels. Most modern operating systems divide (or "partition") the entire physical hard drive into one or several independent parts ("partitions"). To understand how files can be recovered from a disk, it helps to understand how files are stored on hard disks before they are lost.
DATA RESCUE 4 RECOVER FILE TYPES HOW TO
We'll also show you how to apply this knowledge to a few common scenarios in order to estimate your chances for a successful file recovery.Īn important article for file recovery from SSD devices: File Recovery Specifics for SSD devices. In this article, we'll take a very high level look at how file recovery works. Professional data recovery usually requires years of experience and deep knowledge of the technical nuances of file systems and disk physics, learning the basics can help you set reasonable expectations for your data recovery software. To help contextualize the answer to this question, it helps to gain a basic understanding of how files are stored on the disk and how they can be recovered. This raises a common question from our users: why? And in some cases, no intact files can be found. Other times, the files and data may be recovered, but the filenames, date/timestamps and folder paths are lost. Many times, it's possible to completely recover lost files from a disk, including the original filenames and folder structure. No two data recovery situations are alike.
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