Recovering Data From Hard Drives
Overview
Modern computer system hard drives can contain a massive amount of data. So when the hard drive fails, and there are no recent backups available, data recovery is the only option available.
Introduction
A hard drive consists of a number of component parts. Each of which has its own failure modes.
1. Electronics
2. Mechanics
3. Firmware
4. Logical
Electronics
The electronics on a hard disk is the ‘brain’ of the hard drive and a single component failure will render the drive useless. Recovering data from hard drives with electronics failures requires highly skilled electronics engineers who are able to fix the drive temporarily in order to recover the data.
There are also electronic components inside the hard drive that are critical for the correct operation of the hard drive and consists of the head pre-amplifier circuit.
Mechanical
The critical mechanical parts of a hard drive comprise of, the actuator arm, the motor and the platters. (There are other Mechanical parts, vibro-acoustic components, filters, VCM Magnets, etc, but these are less critical).
The majority of mechanical breakdowns involve the Head pre-amplifier. Whilst this is not exactly a mechanical failure, the method that the head pre-amplifier is fixed to the head stack means that when it fails it involves the replacement of the entire head stack assembly.
The next biggest cause of failure is motor failure. This is a very significant problem and requires specialist equipment so that platter alignment is not lost when removing and replacing the motor. Main problems with motors are burnt out coils and seized bearings.
Firmware
The firmware region or System Area (SA) is a section on the hard drive that contains the manufacturer’s proprietary information such as
- ATA Password Information
- Security Data
- ROM overlays.
- SMART Logs
- Zone Tables
- Operational code
- Head maps
- Translator Tables
and many others
For a hard drive to work properly it is vital that the Firmware Zone is error free. Working on the Firmware on a hard drive is a highly skilled job and requires specialist equipment. Making a mistake when changing the information in the Firmware of a hard disk can render a drive useless.
Logical
Logical problems are where there is no physical problem with the hard drive and it is fully functional. Logical problems are where data has become inaccessible for some reason, for example, the user has deleted the files, the computer has come under virus attack. The skill set of the engineer requires knowledge of how the operating system that the data was stored on works. Also, knowledge of the structure of individual file types so that quality of files can be determined on a bulk and individual basis.
Data Recovery from Hard Disk Drives
MjM Data Recovery Ltd
Want Professional Knowledge About Data Recovery Choice – Read these Tips
How to identify data recovery software for your needs.
Data recovery software can be used to recover data that has been lost or files that have been deleted from your computer’s hard disk or a CD or DVD. Since there are several data recovery programs available in the market, you need to select the one that suits you most. This will ofcourse depending on your computer system, whether it is just a personal computer or a large network systems. There are different data recovery softwares in the market that caters to your exact need.
You find the most suitable data recovery software by using the following guidelines:
One, you should look for a data recovery program that is easy to install. Most users have limited knowledge of computers and may not be able to use a program that requires a complex installation procedure.
Two, the software should be compatible with a range of platforms such as Windows 2000, Windows XP, Windows 98 and Windows NT. This will allow you to use the program across a number of operating systems.
Three, the data recovery program should come with clear instructions and should be easy to use. Some programs have options that are not easy to find and users waste a lot of time looking for them.
Four, you should ideally look for a program that allows you to recover data across storage media, like hard disks, CDs, DVDs, or thumb drives. The data recovery program should be capable of recovering all of the data or a part of it and you should be able to use it to recover one file or many files, with ease.
Five, the software should support multiple file systems like FAT, FAT32, and NTFS, because different file systems are used by different operating systems.
Six, some data recovery programs are capable of working as background agents that backup critical data selected by users for protection. These can be more useful than others.
Seven, look for data recovery software that offers a high level of support by means of helpdesk, e-mail or phone. Vendors should provide all relevant information about the software on their website.
Eight, there may be a large number of files that can be recovered and it may take a lot of time to search for a particular file manually. A good data recovery program will have search capabilities and will help you to find files you want to recover easily.
Finally, you may find that some data recovery software are able to locate the files that you are looking for, but are not able to restore them to their original file directory. Look for software that will help you do this.
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Cheap Data Recovery – Don’t You Value Your Data?
Making the right choice in which Data Recovery company to work with can be a bit of a chore at an often crucial time, but getting it right is vitally important to ensure the best success rate.
You need to ensure that the specialist that is handling your data is well trained and conversant with the latest data recovery techniques as drives and techniques do change on a regular basis.
Unfortunately some companies only undertake recovery tasks on an irregular basis and do not have either the skill set or necessary tools to carry out a full recovery of your data.
If the company you choose do not focus on recovery full time then you may bump into capacity problems, so a good question to ask is how many dedicated staff do they have or even can they do server recovery in addition to data recovery if required.
Top tier data recovery companies will be at the cutting edge and will be carrying out their own research and developments Changes to hard drive specifications or new tools are often unavailable so companies need to self develop.
A very good question to ask to test the water is does the company have its own call out service for raid recovery or server recovery emergencies.If they say no you may want to choose some one else.
Frighteningly some companies will only have a basic workbench to recover your data, you want to ensure at the very least they have a certified (preferably certified to ISO class 3 standards).
Most businesses also need to get their data back as soon as possible as downtime costs money so make sure that the company you work with don’t have to send your drive abroad if they don’t have their own lab facilities.
Suffering a data loss has been known to make a business go under but no matter how urgent the situation do your self and your business a favor and make sure you are giving your data to a company that has the best capability to get it back for you.
Why You Shouldn’t Try Data Recovery Yourself
In the world of computers, data recovery is something we all know and rely on to recover lost of missing data. The process of data recovery is very complicated, one that you should never attempt to do yourself. Hard drives especially, are very fragile and need extra special care when they are worked on. You have to be careful with the small components inside of them, which is why only a trained specialist should be attempting data recovery.
Why You Shouldn’t Try Data Recovery Yourself
When you first take your hard drive to a specialist, they will perform an evaluation then get back to you and tell you the problem, as well as the cost. When most people get their price quote, they immediately think the price is too high. As this happens, the individual will decide to try their own data recovery. This isnt the smartest idea, as it normally results in your data being lost forever. In most cases, where individuals attempt data recovery themselves, the data is so far gone that even the best data recovery specialist cant bring it back.
When the hard drive crashes and data cannot be accessed, most people will think about using a disk repair utility. This isnt a good idea, as the software will normally write to the disk, causing the data that is currently stored to be overwritten. These types of software programs can be very complex, and in most cases, wont fix the problem. They should be avoided at all costs, for the simple fact that they wont bring back your data – they will only make things worse.
Another common mistake people make, that should never be attempted, is to open up the hard drive and try to rebuilt it. Hard drives are full of very delicate components, many of which are very small, and very fragile. The platters are the most sensitive inside of the hard drive, as they are small and contain a layer of magnetized material. This material is very fragile, and sensitive to debris, dust, and especially your fingerprints.
If you dont know how to handle the platters, you can easily scratch their surface, which could indeed damage them forever. There is a spindle inside of the drive, which constantly moves the platters. A motor is there as well, which determines the speed that the platters revolve. The platters store data for the entire drive, which is accessed by an actuator arm. When the hard drive is in operation, the platters and the actuator arm move at very fast speeds, which is why everything has to be perfect.
If you go to tamper with the drive and attempt to rebuild it yourself, youll more than likely damage something. The technicians that work with data recovery on a daily basis are experts with hard drives, and know exactly how to handle the devices. They know how to handle the platters, the actuator arm, and how to put everything back in a complete working fashion. More about Data Recovery.
Data Recovery Things You Need To Know
The computer seems to have taken over the world in a very short period of time and keeping every thing digital is becoming the target for organisations and business around the globe.
It saves storage and space and is more friendly to the environment so we just keep piling more and more data onto our hard drives and storage systems.
Unfortunately drives and raid set ups do go wrong and when they do disaster strikes and years of your data could now be lost especially if you have no back up solution in place.
For a home user this could mean the loss of years of family photo’s as these days we rarely in reality print out all of our photos. Equally you may have other valuable data which has taken you years to put together and if it suddenly goes the loss can be devastating. For a business data loss can be financially crippling.
When a hard drive or server RAID array fails, you need a trusted and registered data recovery operation registered with credit safe and preferably one with its own clean room preferably ISO 3 certified just in case your drive(s) need to be dismantled as a method of retrieving your valuable data.
Many data recovery operations claiming to have been in existence for many years do not have any real facilities facility or track record. And frighteningly many have no background or qualifications to carry out a data recovery task.
Equally they will have no secure areas for making sure your drive does not fall into the wrong hands.
Without correct handling more damage can be done to a drive making what was recoverable data irrecoverable so choose your service provider carefully.
Another thing to confirm if you do need data recovery is where the drive will go if it needs further investigation.
If you are based in the UK for example and the drive has to be sent abroad this will not help you get back up and running in the shortest possible time frame, which is crucial if mission critical data needs recovering.
Business down time cost a fortune so don’t take any risks.
Many IT Professionals will need raid data recovery experts to rebuild and recover the data from all kinds of raid server array and external storage including NAS and San storage drives.
Raid data recovery is an order of magnitude more complex than a standard hard drive recovery and more often than not even a professional computer support engineer will not have the skill set or tools to do this.
In summary always make sure you choose your data recovery company wisely and if you are at all unsure contact your local computer support provider who should be able to recommend a service at the very least.