Archive for the ‘Hard Drive Repair’ Category

Hard Drive Data Recovery

Friday, February 6th, 2009

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Boot Sector Viruses Can Damage HDD.

Before discussing what a boot sector virus does, let’s first take a look at what a boot sector is. A floppy disk or hard drive is comprised of many segments and clusters of segments, which (in the case of a hard drive) may be separate by partitions. There has to be a way to find all the data spread across these segments, hence the boot sector operates as a virtual rendition of a library’s Dewey Decimal system. Each disk also has a Master Boot Record or (MBR) that locates and runs the first of any necessary operating system files needed to facilitate operation of the disk. When a disk is read, it first seeks the MBR, which then passes control to the boot sector, which in turn provides pertinent information regarding what is located on the disk and where it is located. The boot sector also maintains the information that identifies the type and version of the operating system the disk was formatted with.

This is a highly simplistic overview of the boot sector function, but it serves our purpose well as it underscores the critical nature of the MBR and boot sector.

Obviously, a boot sector or MBR virus that invades this space on the disk puts the entire operation of that disk at risk.

A boot sector virus is spread via infected floppy disks. This typically occurs when users inadvertently leave a floppy disk in drive A. When the system is next started, the PC will attempt to boot from the floppy. If the disk is infected with a boot sector virus, that virus will infect the boot sector of the user’s local drive (C). Unless the floppy disk happens to be a bootable system disk, the user will simply see a standard warning that the drive contains a “non-system disk or disk error” and the user will be prompted to “replace the disk and press any key when ready”.

This is a standard error message and is not in and of itself indicative of a boot sector infection. All it means is that a non-bootable disk is contained in the drive the computer is first trying to boot from.

Most users will realize a floppy has been left in the drive, remove it, and reboot the system, unaware they may have just infected their system with a boot sector virus. Of course, if the disk was bootable, they would not receive the error noted above, but will simply be booted to a DOS screen.

Care should be taken to ensure that any bootable floppies have been checked for the presence of boot sector viruses and these disks should be write-protected to ensure no future infection takes place.

Even non-bootable disks can spread a boot sector infection when they are accessed. Further, a boot sector infected hard drive will also infect any floppies used in the system. Where applicable, use write-protected floppies to protect against this.

To write-protect a floppy disk, hold it so that the metal plate is facing downwards. Along the top edge there may be an “open” square. Look closely and you will find a small cover that can be pushed back and forth over the open square. If the cover is closed, i.e. the square is covered, the disk can be written to. If the cover is open, i.e. the square is not covered, the disk cannot be written to and is considered write-protected.

Of course, you would not want to write-protect floppies you use to copy files to, as you would receive a write protection error the next time you attempted the copy.

Most of today’s PCs no longer seek out the floppy drive during bootup, instead using the CD-ROM drive as the first boot device. This can be configured via the system CMOS screen to change the boot sequence to check the hard drive first, the CD-ROM drive second, and the floppy drive third, if at all.

Changing settings in CMOS incorrectly can result in system failure and should not be attempted by inexperienced users. Instructions for accessing the CMOS configuration screen for your PC can generally be found in the motherboard manual.

The first boot sector virus was discovered in 1986. Dubbed Brain, the virus originated in Pakistan and operated in full-stealth mode, infecting 360Kb floppies.

Perhaps the most infamous of this class of viruses was the Michelangelo virus discovered in March 1991. Michelangelo was a MBR and boot sector infector with a March 6th payload overwriting critical drive sectors. Michelangelo was the first virus to attract a large amount of media focus.

Article source from:-http://hdddatarecovery.blogspot.com/2008/12/boot-sector-viruses-can-damage-hdd.html

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Hard Drive Recovery 1.7.3 Publisher’s Description

Monday, January 19th, 2009

Fix damaged hard drives and restore partitions, unformat disks and undelete files in one safe, easy and straightforward operation. The Data Recovery Wizard featured in Mareew Data Recovery makes it possible for anyone to recover disks and data, undelete files and restore access to damaged media.

The recovery wizard makes it easily possible to fix inaccessible disks, recover data or undelete erased files with a simple step-by-step interface. Just click on a disk that used to contain your files and data, and let Mareew Data Recovery do the rest!

Easy to use does not mean simple. Under the hood, Mareew Data Recovery features a set of powerful data recovery technologies that, combined, yield the most satisfactory result. The Power Search technology makes it possible to locate documents that were lost or deleted ages ago, with no traces left anywhere in the file system. Combining low-level access techniques with signature-based pattern matching, PowerSearch returns the most complete list of documents. Supporting over a hundred file formats from Microsoft Office to digital pictures, the addition of PowerSearch makes Mareew Data Recovery a truly universal and a highly competitive data recovery tool.

The Live Preview feature is a welcome addition that makes it possible to list the contents of a damaged disk and preview each deleted document before the recovery. No need to pay for the product that can?t recover your files and data!

Mareew Data Recovery works in all 32-bit versions of Windows from Windows 95 to Vista, and supports a variety of media storage devices. Hard disks and USB drives, memory cards and digital cameras, SD, MMC, Flash and many more stand-alone devices can be recovered with Mareew Data Recovery. Even more, the RAID arrays and Dynamic Disks are fully supported! Mareew Data Recovery recovers disks and media formatted with any version of FAT and any revision of NTFS, making for a truly universal data recovery tool. Try it fee at www.mareew.com

 

Requirements: A standard Win PC

 

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Vista NTFS Hard Drive Recovery 1.1

Saturday, January 17th, 2009

Windows Vista NTFS hard drive recovery software is an advanced Disk Recovery NTFS tool to salvage NTFS data from logically corrupted, bad sector affected or virus infected hard disk drive.

NTFS drive recovery utility rescue NTFS data from inaccessible root directory and boot sector. Undelete NTFS Software is best partition recovery tool to fix NTFS files and rescue NTFS partition data within few clicks.

NTFS Volume recovery software provides effective solution to salvage lost or deleted files from NTFS/NTFS5 partition based Windows OS. Vista NTFS Hard Drive Recovery Tool helps to salvage your lost crucial data, damaged or corrupted MFT (Master File Table), MBR (Master Boot Record) and partition table.

 

Get back NTFS files and rescue NTFS drive data by using Undelete NTFS Data Recovery Software. Features of Vista NTFS Hard Drive Recovery : * NTFS data salvage software provides attractive graphical user interface. *

Undelete NTFS tool does not require any technical skill to operate. * Windows Vista NTFS files rescue utility salvage all deleted data from formatted disk drive.

* Windows NTFS data restoration tool recovers unerase NTFS data from corrupted NTFS hard disk drive. * NTFS data recovery utility provides recovery after deletion of files from recycle bin, using Shift+Del key or virus attack.

* NTFS drive recovery software recovers data even if drive not formatted message is being displayed on your laptop/desktop screen.

 

Windows Vista NTFS hard drive recovery utility retrieves data, files and folder even if system displays an error message such as invalid command, hard drive failure and disk error etc.

NTFS data recovery software restore NTFS data which are permanently deleted from computer system. Vista NTFS Hard Drive Recovery

Software supports recovery from all windows operating system such as Windows 95, 98, 2000, Me, NT, XP, 2003 Server and Windows Vista.

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