Hard Drive Data Recovery Software & File Repair Tools

Quick Recovery range of Linux Data Recovery Software can successfully restores linux LVM data if linux LVM partition or volume gets damaged and in case of following cases

• Super Block ,  Inode Table  and Group Descriptor Block gets corrupted
• Partition structures deleted 
• Accidental File Deletions and
• Unexpected System Shutdowns.

Quick Recovery range of Linux Data Recovery Software, recovers files from Red Hat, Mandrake, Turbo, SuSe, Caldera, Debian, Ubuntu and SCO operating systems based on Ext2, Ext3, ReiserFS file systems. Quick Recovery range of recovery software for Linux supports all variants of Linux-based operating systems which leads to a promising venture for linux data recovery services.

Get back your LVM partition data back using Quick Recovery for Linux.

You can easily access your Windows partitions from Linux but to access your Linux partitions from within Windows you require a tiny free utility called Explore2fs. Using this utility you can easily access Linux ext3 or ext2 partitions without any problem. This way you can always get your favorite MP3/video or PDF file stored inside Linux ext3 file system. This utility works on

Windows 95
Windows 98
Windows ME
Windows NT 4.0
Windows 2000
Windows XP
Windows Server 2003

However we don’t recommend to install this utility on a production Linux serer (if you have one) as it does not enforce security permission from windows operating system. One more thing before using this utility make sure you have a backup of all important data.

Download Explore2fs
You can download Explore2fs, the WIN32 explorer for Linux ext2fs partitions here !

You can also use Ext2 Installable File System For Windows which provide Complete reading and writing access to files and directories of volumes with the Ext2 or Ext3 file system. You can download it here.

ReiserFS is a general-purpose, journaled computer file system designed and implemented by a team at Namesys led by Hans Reiser. ReiserFS is currently supported on Linux and may be included in other operating systems in the future. Introduced in version 2.4.1 of the Linux kernel, it was the first journaling file system to be included in the standard kernel.

ReiserFS Features

ReiserFS has fast journaling, which means that you don’t spend your life waiting for fsck every time your laptop battery dies, or the UPS for your mission critical server gets its batteries disconnected accidentally by the UPS company’s service crew, or your kernel was not as ready for prime time as you hoped, or the silly thing decides you mounted it too many times today.

ReiserFS is based on fast balanced trees. Balanced trees are more robust in their performance, and are a more sophisticated algorithmic foundation for a file system. When we started our project, there was a consensus in the industry that balanced trees were too slow for file system usage patterns. We proved that if you just do them right they are better–take a look at the benchmarks. We have fewer worst case performance scenarios than other file systems and generally better overall performance. If you put 100,000 files in one directory, we think its fine; many other file systems try to tell you that you are wrong to want to do it.

ReiserFS is more space efficient. If you write 100 byte files, we pack many of them into one block. Other file systems put each of them into their own block. We don’t have fixed space allocation for inodes. That saves 6% of your disk.

Ext3 & ReiserFS has three kinds of journaling methods

1) Journal Data Writeback
2) Journal Data Ordered
3) Journal Data

By default the the 2nd method is used. To speed things up we will make it use method 1. The price to pay is that it may allow old data to appear in files after a crash and journal recovery.

If in case you face any kind of ReiserFS system crash and need to recover your data from ReiserFS file system then “Quick Recovery for Linux ReiserFS” is the solution.

Recover ReiserFS Files using “Quick Recovery for Linux ReiserFS“.

Introduction

ext3 Filesystem

The ext3 or third extended filesystem is a journalled file system that is commonly used by the Linux operating system. It is the default file system for many popular Linux distributions

Features of ext3 File System

The ext3 file system is essentially an enhanced version of the ext2 file system. These improvements provide the following advantages

Availability

After an unexpected power failure or system crash (also called an unclean system shutdown), each mounted ext2 file system on the machine must be checked for consistency by the e2fsck program. This is a time-consuming process that can delay system boot time significantly, especially with large volumes containing a large number of files. During this time, any data on the volumes is unreachable.

The journaling provided by the ext3 file system means that this sort of file system check is no longer necessary after an unclean system shutdown. The only time a consistency check occurs using ext3 is in certain rare hardware failure cases, such as hard drive failures. The time to recover an ext3 file system after an unclean system shutdown does not depend on the size of the file system or the number of files; rather, it depends on the size of the journal used to maintain consistency. The default journal size takes about a second to recover, depending on the speed of the hardware.

Data Integrity

The ext3 file system provides stronger data integrity in the event that an unclean system shutdown occurs. The ext3 file system allows you to choose the type and level of protection that your data receives. By default, Most Linux Distributions configures ext3 volumes to keep a high level of data consistency with regard to the state of the file system.

Speed

Despite writing some data more than once, ext3 has a higher throughput in most cases than ext2 because ext3’s journaling optimizes hard drive head motion. You can choose from three journaling modes to optimize speed, but doing so means trade offs in regards to data integrity.

Easy Transition

It is easy to change from ext2 to ext3 and gain the benefits of a robust journaling file system without reformatting. See the Section called Converting to an ext3 File System for more on how to perform this task.

If in case your linux system crashes and you need to recover data from ext3 partition then try using Quick Recovery for Linux to get back data and files.

We at Unistal Systems provide data recovery software and services to salvage data from crashed hard drive. We are equipped with Class 100 Clean Room Labs to perform the precise data recovery to get back data from crashed hard drives. Our services are highly recommended by Government Organizations, Intelligence Agencies, Forensic Experts, Defence Establishments etc. We are in service since 1994 and have gained vast exposure to the data recovery cases. Our success rates are almost 97%.

If you ever had a disk crash and need to salvage data from your crashed disk then contact our data recovery labs for FREE data recovery quote.

Unistal’s – Product Electronic Download, Installation & Registration

Thank you for purchasing Unistal’s Software Products.

Note: Please follow the registration process carefully. Your installation is incomplete until you complete the product registration process. This software will work only on the number of computers it is licensed for. Please install the software only on the computer it is intended to be installed.

After placing an online order, user gets following details:

• Link from where the product can be downloaded.
• Product Key number, which will be used to activate the software.
  To download the software, Please Click on the download link of the product.

Once the downloading is completed, please click on the self-extracting file to start the installation process.

At the end of installation process, a   Registration Form is displayed.

Snapshot of Product Registration Page

Please enter an active Email ID and the Product Key Number (…………………….) and Submit the form.

After submitting the registration form, you will receive an Email in a few minutes (within one hour) having the Activation Password .

Click on the Product icon from the desktop and enter the Activation Password and Key Number.

Now you are ready to use Unistal’s software. 

For Computer without Internet Connection (or if Internet is not active)

After the Installation process, since there is no Internet connection,

• An executable file by the name of Registration.exe will be created on the desktop.
• Please Copy this Registration.exe file to a  floppy and carry this floppy along with the Product Key Number to a computer having Internet Connection.
• Copy Registration.exe file from the floppy to the desktop of the computer having internet connection and click on it.
• Internet explorer will now open registration page.
• Please enter your company details, Product Key Number and Email ID here. Please enter a valid and configured Email ID since you will be receiving the activation password on this email.
• Once, you’ve filled up the registration form please Click on Submit button.
• Now, You will receive an email containing the Activation Password. Please Note it down.
• Now carry this password back to the computer where you have installed the software.
• When you run the software, it will ask for the activation password. Please enter the received activation password to complete the registration process.

Quick Recovery recovers files from logically damaged or formatted drives. Quick Recovery offers two separate, fully automated data recovery mechanisms to maximize your chances of success. One mechanism works with files of any type, the other one recovers JPEG (JPG), PNG, GIF, TIFF, BMP, MS Office (DOC, XLS, PPT), Acrobat (PDF), ZIP. Specifically supports FAT12, FAT16, FAT32, and NTFS, Ext2fs, Ext3fs, All version’s of Novell Operating System file systems, All flavours of Linux Operating System and RAID Technologies.

Quick Recovery works not only on hard drives, floppy disks, CDs, and DVDs, but also on CompactFlash cards, SmartMedia cards, memory sticks, pen Drives etc.

Quick Recovery will recover your data if the hard drive’s partition table, boot record, FAT/MFT or root directory, Inode Table, Super Block and Group Descriptor Block meta tags are overwritten lost or damaged or if DET (Directory Entry Table) meta tags are overwritten.
 

What is Data ?

Files created by a computer user/application for the purpose of analyzing information. It is a work of art, creativity or outcome of any sort of specialization. Data is an invaluable asset. It is the most expensive, in-dispensable part of the computer system. If destroyed it rarely possible to recreate it to its original state.

What is Data Loss?

Data loss can be defined as a situation caused by various known or unknown reasons when file(s) are not visible/accessible in the file system. The causes of this could be many. When data loss occurs, it is widely accepted that it is lost for ever! Data recovery can be done out of most cases of data loss. When data is lost, it is because if is de-linked from the existing file system or the existing file system itself gets corrupted or changed.

The most common causes of data loss are:

Physical Data Loss: 

Hard disk drives store data on one or more metal oxide platters. These platters, which spin at a rate of 3600-10,000 revolutions per minute, hold magnetic charges. A read/write head attached to an actuator arm actually floats on a cushion of air, 1-2 micro-inches (one millionth of an inch) above the surface of the platters. Data flows to and from these heads via electrical connections. Any force that alters this process may cause data loss to occur.

More data is being stored in smaller spaces. Ten years ago hard drives stored 40 Megabytes (MB) of data. Today’s hard drives store up to Terabytes (TB) on a smaller surface than the drives of a decade ago. Increasing storage capacities amplify the impact of data loss. As more and more data is stored in smaller and denser areas, mechanical precision becomes crucial.

As a part of this advancing technology, the drive tolerance (distance between the read/write head and the platter where data is stored) is steadily decreasing. A slight nudge, a power surge or a contaminant introduced into the drive may cause the head to touch the platter, resulting in a head crash. In some situations, the data residing in the area touched by the head may be permanently destroyed.

The current tolerance drives is 1-2 micro-inches (millionths of an inch). Comparatively, a speck of dust is 4-8 micro inches and human hair 10 micro-inches. Contaminants of this size can cause serious data damage.

These Physical Data Loss cases include:
•  Hard disk not detecting
•  Media surface damage
•  Bad sectors throughout the disk
•  Logic Card Burnt
•  Servo motor burn
•  Head Crash

Logical Data Loss: 

Following are the main reasons of Logical data loss:

•  Accidental file deletion
•  Computer viruses and worms
•  Damage due to a power failure or surge
•  Software program failures
•  Corrupt or missing critical file system structures
•  Partitioning or boot-up problems
•  Internal & External Sabotage
•  Drives that have been Fdisked or formatted
•  Application crash
•  System shutdown
•  Hard disk or media failure

Data recovery is a process of searching lost data from portions of existing/previously existing file system or from raw sectors and retrieving them with their original structure intact. The most common data recovery process involves the following stages; Analysis of the file system and assembling boot sector, partition table and allocation structures of the system area.

Simulating an intelligent file system from the searched pieces of crashed file system. Searching and linking folders from the disk to the simulated file system. Displaying searched and simulated file system. Saving the selected files to another disk.

More complex data recovery cases require searches and simulations of lost and overwritten partitions or searching for headers / end of file markers of various data files from all sectors of the disk and tagging them as files.

Quick Recovery is a leading data recovery tool for Hard Disk Drive, Floppy Disk, CD-ROM, CD-R/W, Pen Drive, Flash Drive, Memory Cards, Digital Media, ZIP Drive and Other Storage Media. This program uses advanced disk reading to get to the data. Using Quick Recovery is safe since it does not perform any modify or overwrite operation on your original disk or files. All data is rescued to a user-defined, secondary location.

Qualities of Quick Recovery Software :

• Continuous optimization and R&D since 1993 by data recovery specialists and system programmers.

• Quick Recovery has matured exponentially after incorporating more than 19000 data recovery cases of various types.

• Being used by more than 250 commercial data recovery centers all across the world.

• Quick recovery is very popular amongst computer repair and service firms who offer computer maintenance and software maintenance contract to their clients.

• Quick recovery has unique Guided file excavation technology which bypasses the operating system functionalities to simulate partially overwritten file systems or partitions.

• Automatically diagnoses the best and shortest method to recover data in a crashed computer hard disk.

• Free data recovery analyzer that displays the best results that are possible in recovering data from the disk.

• Effective bad sector management helps to manage and skip multiple bad sectors found during the recovery process. Extracts data even if a few bytes in a bad sector are good.

• Gives the Quick Recovery user exhaustive file saving options like, save only deleted files, save files have a particular date stamp range or invert selection saving etc.

• Data recovery interface for all types of file systems have similar looks and recovery steps.

Unique Features

Quick Recovery recovers files from logically damaged or formatted drives. Quick Recovery offers two separate, fully automated data recovery mechanisms to maximize your chances of success. One mechanism works with files of any type, the other one recovers JPEG (JPG), PNG, GIF, TIFF, BMP, MS Office (DOC, XLS, PPT), Acrobat (PDF), ZIP. Specifically supports FAT12, FAT16, FAT32, and NTFS, Ext2fs, Ext3fs, All version’s of Novell Operating System file systems.

Quick Recovery works not only on hard drives, floppy disks, CDs, and DVDs, but also on CompactFlash cards, SmartMedia cards, memory sticks, pen drives etc.

Quick Recovery also allows you to recover digital photos accidentally deleted from digital camera memory. There exists a vast variety of digital camera and associated media types, which are supported by Quick Recovery e.g. CompactFlash, MemoryStick, SmartMedia and so on, accessible by means of operating system. You need to use your camera or the appropriate card reader to perform Data Recovery which you normally use to transfer images from camera to PC.

Quick Recovery provides an easy recovery procedure to recover all the data from logically crashed disks or accidentally deleted files. The software is a safe and affordable do-it-yourself file-recover solution to recover deleted files from all types of hard drives and other types of fixed media. File Recover supports IDE/ATA/SCSI drives and drives larger than 8GB. The program supports long file names and is easy to use.

Quick Recovery’s active file recovery panel display interface allows you to find, preview, and recover lost or deleted files . It scans computer hard drives in minutes and displays all recoverable files.

Quick Recovery can recover files that were damaged by virus or accidentally deleted from Windows Explorer, the Recycled Bin, the DOS command line, or a network share along with original folder names and file Create and Modified dates. It supports reformatted volumes or broken hardware/software RAID volumes as well as Unicode filenames and more.

If you’ve lost your data and you want to get data back, you need Quick Recovery to recover your data in an efficient way.

Quick Recovery will recover your data if the hard drive’s partition table, boot record, FAT/MFT or root directory, Inode Table, Super Block and Group Descriptor Block meta tags are overwritten lost or damaged or if DET (Directory Entry Table) meta tags are overwritten.

What is RAID?
RAID is an acronym for Redundant Array of Inexpensive Disks. It is a method of combining several hard disk drives into one unit. This method offers fault tolerance (the ability of a system to continue to perform functions even when one or more hard disk drives have failed) and higher protection against data loss than a single hard drive.

Need for RAID?
RAID provides real-time data recovery when a hard drive fails, increasing system uptime and network availability while protecting against loss of data. Another advantage of the system is that multiple disks working together increase overall system performance. Any individual or company could benefit from having a RAID RECOVERY system in place.

Different Levels of RAID
There are several different levels of RAID available. Each level offers various advantages in terms of data availability, cost and performance. Your best bet is to assess your needs in order to determine which level works best for you.

The most popular RAID systems are the following:

RAID 0 - Data striping (no data protection)
The benefit of this system is that it offers the highest performance.

RAID 1- Disk Mirroring (provides data protection by duplicating all data from a primary drive on a secondary drive).
The benefit of this system is it offers the highest data protection.

RAID 0/1- This combines both Raids 0 and 1.
The benefit here is highest performance + highest data protection.

RAID 5 - Data striping with distributed parity (a form of data protection that recreates the data of failed drive in a disk array).
This system offers the best cost performance for multidrive environments. Having a RAID system installed can provide peace of mind. With RAID installed you can rest assured that even in the event of a system failure your important data will be safe.