This document provides an example of using Data Compass software to recover data from a hard disk drive (HDD) with serious bad sectors in the data area. It describes connecting the HDD as a slave drive which causes the operating system to crash. Data Compass is then used to image the entire HDD and bypass the operating system. The software scans the drive and detects multiple bad sectors distributed across the drive. Data Compass can access and recover data from the drive where other recovery methods have failed due to the bad sectors. Settings like disabling writing and enabling different reading modes are adjusted for optimal data recovery from the damaged drive.
Image From Hdd With Severe Bad Sectors in Data Area
1. SalvationDATA Data Recovery Example Application:
Image from the HDD with serious bad sectors in the Data Area by Data Compass
What failures can Data Compass help to solve?
1.Logical Malfunctions
Partition Loss
File loss or destruction
Virus attack
Accidental formation
Accidental deletion or clone
2. Physical malfunctions
Data recovery from a drive with physical defects within the firmware Service Area, unrecoverable using
conventional processes. (Note: IBM/Hitachi drives are currently supported and other brands will come with this
feature in the near future)
Data Recovery from drives with severe defects in the firmware service area using hot swap by Data Compass
Based on that the data area can be accessed by DC and DC can recover data from quot;clickingquot; drives caused
by poor performance of the Read/Write head assembly or degraded magnetism of the servo information on the
platter surface.
Data recovery from drives with a wide distribution of bad sectors where Logical Recovery software has been
unsuccessful.
Data recovery from drives with multiple bad sectors or unstable read caused by poor head exchange
Data recovery from drives whose heads or motors are unstable Recover target data fast when there are
multiple bad sectors or unstable read or bad sectors caused by poor head replacement.
For hard disk image, DC is the best choice.
What malfunctions Data Compass cannot handle directly
To drives with very severe or complete physical damage, DC cannot recover data directly. The following are some
examples:
PCB burnt
Complete head or motor damage
Severe scratches on the disk data areas
The HDD was overall cleared or the target data area was covered.
The data in the data area cannot be viewed by DC
Firstly, Let's examine the disk by its appearance to find out if it was stroke or disassembled. You may ask the
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customer for detailed information or check if the screws were twisted off. These physical examination on the patient
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disk is very important and necessary before connecting to power. Because some physical damages to disks are
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fatal and unrecoverable.
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SalvationDAT A Technology, LLC.
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Fax:(+86) 28 68107757 Http://www.salvationdata.com Unauthorized copy or distribution of this document is prohibited.
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6. SalvationDATA Data Recovery example application
After setting the parameters, you can switch to Sector View interface and inspect the content of any section. Once
you input any LBA in DEC or HEX (DEC means Decimal number, HEX means hexadecimal), system will
automatically show a corresponding numerical in another frame
If the data are all shown as 4040, then it means the current sector is corrupted. It is because that if the data cannot
be read out, the system will define it as 4040.
If the data we see are not 4040, and we can read the content, then we can use Data Compass Explorer
(Abbreviation: DCEXP) to copy the data. Press DC Explorer or double click the DCEXP.EXE file in the installation
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directory, this program will be launched automatically.
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SalvationDAT A Technology, LLC.
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Fax:(+86) 28 68107757 Http://www.salvationdata.com Unauthorized copy or distribution of this document is prohibited.
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10. SalvationDATA Data Recovery example application
In this case study, the effective data is imaged to a connected external WD 120G HD. When clicking quot;Create Taskquot;
to execute the image command, a window will pop up and shows quot;Creating Bitmap, please wait quot;. Please note
that when imaging the effective data , it may take some time to be responded, please wait patiently then till the
image is complete. Besides, when imaging effective data, it doesn't mean the capacity of target should be larger
than the effective data. It is because while creating the Bitmap, it will allocate the size according to the partition (not
the disk). So please make sure that the capacity of the target disk is larger than the partition where the effective
data stored.
Till the Bitmap is created successfully, it will redirect to the next screen. Please click quot;Startquot; button and begin
imaging. There are parameters of image which you can select on the left quot;Set Upquot; panel: Block Size, Timeout (MS).
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Also you can choosequot; Known Bad Sector Retryquot; option and it can work together with the quot;Retry Timesquot; in the Data
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Compass Panel menu.
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SalvationDAT A Technology, LLC.
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Fax:(+86) 28 68107757 Http://www.salvationdata.com Unauthorized copy or distribution of this document is prohibited.
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11. SalvationDATA Data Recovery example application
On the right upper panel, the default setting is that the four options are selected: quick obverse image; quick
reverse image; intensive obverse image and intensive reverse image. While running the DC Explorer, it will image
according to the default setting: quick obverse image and skip the bad sectors, then quick reverse image till find the
bad sector again. After the quick obverse and reverse image both are completed, for the nonretrieved bad sectors,
the program will make another the intensive obverse and reverse images.
In the process of image, it can show LBA value of any sector by left clicking on any sector on the disk map.
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SalvationDAT A Technology, LLC.
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Fax:(+86) 28 68107757 Http://www.salvationdata.com Unauthorized copy or distribution of this document is prohibited.
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13. SalvationDATA Data Recovery example application
So far, the complete data recovery process is done and retrieve the data! Data Compass is a professional data
recovery tool and we have the complete intellectual property rights for this equipment. It is not only designed to
solve the logical malfunction, but also more lean to recover data from defective HDDs which have physical
malfunction. Such as physical damage on sectors, read instability, and firmware corruption
The purpose of our development is to change the traditional data recovery ideas and methodib
Today, the 21st century, we are in a data era more than information era. User's data volume is rapidly increasing
along with upgrading of storage products. The HDD 80G, 120G, 160G, we all thought it was enough for use not
long ago, is disappearing
With the tremendous growth of electronic data, our file container is becoming empty. However, on the other hand,
followed by this, there is more chance to lose data stored in media. Furthermore, as the density of media becoming
higher and higher, the need of data recovery cannot be met by the traditional data recovery method For example a
500G hard drive, and the ordinary imaging speed is 2G per minute, it will at least take 4 hours to complete imaging
work. If the defective hard driver with severe physical problem, the time of imaging will be unable to calculated.
Data Compass applied with 9 patent technologies, especially with Shadow disk technology and SA emulation
technology which laid solid foundation for directly extracting data from defective HDD, it is greatly improve the data
recovery success rate and efficiency
Data Compass will change the traditional data recovery mode, and represent a new data recovery trend
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SalvationDAT A Technology, LLC.
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Fax:(+86) 28 68107757 Http://www.salvationdata.com Unauthorized copy or distribution of this document is prohibited.
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