Assalam O ALikum,
The Backup utility in Windows XP and in Windows Vista helps you protect your data if your hard disk stops working or your files are accidentally erased. With Backup, you can create a copy of all the data on your hard disk, and then archive it on another storage device, such as a hard disk or a tape.
If the original data on your hard disk is accidentally erased, overwritten, or becomes inaccessible because of a hard disk malfunction, you can restore the data from the disk or the archived copy by using the Restore Wizard or the Automated System Recovery Wizard.
How to use Backup to protect data and restore files and folders
Note You must have administrative or backup operator credentials on your computer to back up and restore files and folders. Backup operators and administrators can back up and restore encrypted files and folders without decrypting the files or folders.
To make sure that you have the latest information about how to use the Backup program in Windows XP and in Windows Vista, visit the following Microsoft Web site:
Use Windows to back up your computer
http://www.microsoft.com/protect/you...ta/backup.mspx
2ndly
Data recovery is the process of salvaging data from damaged, failed, corrupted, or inaccessible secondary storage media when it cannot be accessed normally. Often the data are being salvaged from storage media such as internal or external hard disk drives, solid state drives (SSD), USB flash, storage tapes, CDs, DVDs, RAID, and other electronics. Recovery may be required due to physical damage to the storage device or logical damage to the file system that prevents it from being mounted by the host operating system.
The most common "data recovery" scenario involves an operating system (OS) failure (typically on a single-disk, single-partition, single-OS system), in which case the goal is simply to copy all wanted files to another disk. This can be easily accomplished with a Live CD, most of which provide a means to mount the system drive and backup disks or removable media, and to move the files from the system disk to the backup media with a file manager or optical disc authoring software. Such cases can often be mitigated by disk partitioning and consistently storing valuable data files (or copies of them) on a different partition from the replaceable OS system files.
Another scenario involves a disk-level failure, such as a compromised file system or disk partition or a hard disk failure. In any of these cases, the data cannot be easily read. Depending on the situation, solutions involve repairing the file system, partition table or master boot record, or hard disk recovery techniques ranging from software-based recovery of corrupted data to hardware replacement on a physically damaged disk. If hard disk recovery is necessary, the disk itself has typically failed permanently, and the focus is rather on a one-time recovery, salvaging whatever data can be read.
In a third scenario, files have been "deleted" from a storage medium. Typically, deleted files are not erased immediately; instead, references to them in the directory structure are removed, and the space they occupy is made available for later overwriting. In the meantime, the original file may be restored. Although there is some confusion over the term, "data recovery" may also be used in the context of forensic applications or espionage.
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