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 Sony HE-3 Head Demagnetizer .Reel to Reel etc. US $73.12 
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 NEW Tape Deck Head Demagnetizer Cassette Reel to Ampex US $12.95
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 Tape head demagnetizer Brand new US $24.95
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 Ampex reel to reel accessory kit head demagnetizer tape splicer leader US $50.00
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 Rare Vintage Still Sealed Bagged Realistic Tape Recorder Head Demagnetizer US $9.99
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 VINTAGE NAKAMICHI DM-10 TAPE HEAD DEMAGNETIZER DRAGON CASSETTE REEL TO REEL OLD US $14.00
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 Vintage Sony Head Demagnetizer HE-2 - In Box With Instructions US $19.99
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 Vintage Realistic Tape Head Demagnetizer Cat. No. 44-215 US $3.00
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 Vintage ? Sony HE-2 Head Demagnetizer in Box US $29.99
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 220-240VAC Tape Deck Recorder Head Demagnetizer,Reel to US $13.95
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 Tape Recorder Head Demagnetizer Cassette Reel to Aiwa US $12.95
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 Tape Deck Head Demagnetizer,Reel to,Cassette,SONY,TEAC US $12.95
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 Tape Recorder Head Demagnetizer Cassette Reel to Tascam US $12.95
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 Cassette Deck Tape Recorder Reel to Head Demagnetizer US $12.95
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 NEW WAND Tape Deck Head Demagnetizer Reel to Cassette US $12.95
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 Cassette Tape Recorder Reel to Head Demagnetizer Akai US $12.95
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 Lot of 10,220-240V Tape Deck Recorder Head Demagnetizer US $134.95
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 Recoton Model 61TR Tape Head Demagnetizer US $9.95
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 8 Track Tape Nortronics Head Cleaner / Demagnetizer all 12 volt 8-track Players US $40.01
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 TENCO Head Cleaner / Demagnetizer for home 117v 8-track Players US $40.01
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 Tape Recorder Head Demagnetizer Cassette Reel to Denon US $12.95
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 Vintage Ampex Head DeMagnetizer Model 820 110V AC Power in Original Box US $39.99
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 Vintge Unbranded Tape Head Demagnetizer Untested US $14.99
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 Vintage Ampex Head DeMagnetizer Model 820 W/Original Box US $34.99
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 VINTAGE TEAC E-1 HEAD DEMAGNETIZER US $49.99
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 Hudinco Tape Head Demagnetizer, In Original Box w/papers! US $12.95
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 VINTAGE SANSUI HEAD DEMAGNETIZER SHE-1 NEAR MINT IN BOX US $59.99
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 Brand NEW Head Demagnetizer for Reel to Reel Players & more FREE SHIP US $12.95
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 Brand NEW Head Demagnetizer for cassette decks reel to reel more FREE SHIP US $12.95
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 Brand NEW Head Demagnetizer for Tape Decks & more FREE SHIP US $12.95
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 Tape Deck Recorder Head Demagnetizer,Reel to,Cassette US $13.95
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Head Demagnetizer
Two Basic Concepts In Data Recovery Industry
Generally, data recovery engineers do recovery work using well-known software in this field but they don’t have a clear mind which software/toolkit is suitable for a particular problem. As there is no major of data recovery in this industry and most of the data recovery engineers only have the computer-related background, most of them mostly misunderstand some concepts and work flow of this field. Therefore, your ease of work will grow if you can make a clear difference of the physical data recovery and logical data recovery. One of data recovery process named 3+1 data recovery can help us to define these two different cases.
Data recovery process that leads to recovery or salvaging of data from physically crashed or damaged hard disk is known as Physical Data Recovery. When there is a physical damage with Hard Disk, need of Physical Data Recovery arises. Physical data recovery is the extraction of the raw data from a damaged disc. If a hard drive is not accessible by software such as the system BIOS, Windows' Disk Management, or other disk utilities it can be considered as truly dead and in need of physical data recovery.
In fact, physical data recovery is the most common problem that professional data recovery companies may face up to. Physical damage always causes at least some data loss, and in many cases the logical structures of the file system are damaged as well. A wide variety of failures can cause physical damage to storage media. CD-ROMs can have their metallic substrate or dye layer scratched off; hard disks can suffer any of several mechanical failures, such as head crashes and failed motors; and tapes can simply break.
Meanwhile, physical data recovery is essential when there is a physical problem with the media or plastics which prevents the data from being read normally. This type of recovery may include dealing with issues such as deteriorating magnetic coatings, cracked or broken reels/cartridge shells, creased tape edges, twisted or folded tape, stretched or broken tape, etc. This recovery type also includes capturing the data from media that has mistakenly subjected to adverse conditions such as water, mud, or other debris. While these physical issues are often difficult to handle, recovery of these types can usually be achieved in the high 98+ per cent range.
The chances of successful data recovery depend on the extent of the damage. Data recovery from a platter that has been heated up to Curie temperature (770 degrees Celsius for iron) is not even theoretically possible as this temperature completely demagnetizes the platters. Physical data recovery from a drive that has failed mechanically may not need any subsequent logical reconstruction if it can be successfully repaired, though in practice many physical repairs are followed by logical reconstruction if some data is permanently lost due to damaged disc surfaces.
Most physical damage cannot be repaired by end users. Some physical recoveries are very time consuming and can be expensive. In most cases, physical data recoveries offer excellent probabilities for a successful data recovery. Furthermore, end users generally do not have the hardware or technical expertise required to make these repairs; therefore, data recovery companies are consulted. These firms often use Class 100 clean room facilities to protect the media while repairs are being made. Different recovery experts offer different data recovery rates.
According to our investigation, in physical failures the average recovery time is anywhere from 5 to 10 business days. In rare circumstances it does take longer to recover the data, especially if there is extensive damage to the platters and/or we have to order hard to find components. The time of recovery usually depends on three variables:
1. What type of failure has occurred?
2. What's the extent of the damage?
3. Will it require the ordering of special components?
Now we can come to a conclusion that physical data recovery is a highly sophisticated, and often expensive service.
However, the more common damage type is logical damage to a file system. Logical damage can be caused by power outages, hardware problems (e.g. RAID controllers), driver problems, or system crashes. All of these events leave the file system in an inconsistent state causing such problems as drives reporting negative amounts of free space, system crashes, or physical loss of data.
There are hundreds of logical data recovery software in the market which can do this and some versions are free of charge too. So the main cost of data recovery equipment is the physical recovery tool kit which is professional but expensive. Personally, I recommend the equipments provided by SalvationDATA Technology which are easy to use, cool in functions and cost-competitive.
About the Author
professor of data recovery
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