Physical Concerns for Data Depending on the type of physical media on which our data is stored, any number of adverse physical conditions may be problematic or harmful to their integrity. Such media are often sensitive to temperature, humidity, magnetic fields, electricity, impact, and more, with each type of media having its particular strong and weak points. Magnetic media, whether we refer to hard drives, tapes, floppy disks, or otherwise, generally involves some variety of movement and magnetically sensitive material on which the data is recorded. The combination of magnetic sensitivity and moving parts often makes such storage media fragile in one way or another. In most cases, strong magnetic fields can harm the integrity of data stored on magnetic media, with media outside of metal casing, such as magnetic tapes, being even more sensitive to such disruption. Additionally, jolting such media
while it is in motion, typically while it is being read from or written to, can have
a variety of undesirable effects, often rendering the media unusable.
Flash media, referring to the general category of media that stores data on nonvolatile memory chips, is actually rather hardy in nature. If we can avoid impacts
that might directly crush the chips on which the data is stored and we do not
expose them to electrical shocks, they will generally withstand conditions that
many other types of media will not. They are not terribly sensitive to temperature ranges below what would actually destroy the housing, and will often survive brief immersion in liquid, if properly dried afterward. Some flash drives are
designed specifically to survive extreme conditions that would normally destroy
such media, for those that might consider such conditions to be a potential issue.
Optical media, such as CDs and DVDs, is fairly fragile, as those with small children can attest to. Even small scratches on the surface of the media may render
it unusable. It is also very temperature sensitive, being constructed largely of
plastic and thin metal foil. Outside of a protected environment, such as a purpose-built media storage vault, any of a variety of threats may destroy the data
on such media.An additional factor that can potentially cause concern when dealing with storage media over an extended period of time is that of technical obsolescence.
Type of storage media, software, interfaces, and other factors can affect our ability to read stored data. For example, at the time of this writing, Sony is planning
to end production of floppy diskettes in March 2011, after having been responsible for 70 percent of the remaining production of such media [3]. Although
floppy diskettes are only now completely fading from use, many new computers no longer come equipped with drives to read them. In a few short years,
finding hardware to read these disks will become very difficult indeed.
Physical Concerns for Data Depending on the type of physical media on which our data is stored, any number of adverse physical conditions may be problematic or harmful to their integrity. Such media are often sensitive to temperature, humidity, magnetic fields, electricity, impact, and more, with each type of media having its particular strong and weak points. Magnetic media, whether we refer to hard drives, tapes, floppy disks, or otherwise, generally involves some variety of movement and magnetically sensitive material on which the data is recorded. The combination of magnetic sensitivity and moving parts often makes such storage media fragile in one way or another. In most cases, strong magnetic fields can harm the integrity of data stored on magnetic media, with media outside of metal casing, such as magnetic tapes, being even more sensitive to such disruption. Additionally, jolting such media
while it is in motion, typically while it is being read from or written to, can have
a variety of undesirable effects, often rendering the media unusable.
Flash media, referring to the general category of media that stores data on nonvolatile memory chips, is actually rather hardy in nature. If we can avoid impacts
that might directly crush the chips on which the data is stored and we do not
expose them to electrical shocks, they will generally withstand conditions that
many other types of media will not. They are not terribly sensitive to temperature ranges below what would actually destroy the housing, and will often survive brief immersion in liquid, if properly dried afterward. Some flash drives are
designed specifically to survive extreme conditions that would normally destroy
such media, for those that might consider such conditions to be a potential issue.
Optical media, such as CDs and DVDs, is fairly fragile, as those with small children can attest to. Even small scratches on the surface of the media may render
it unusable. It is also very temperature sensitive, being constructed largely of
plastic and thin metal foil. Outside of a protected environment, such as a purpose-built media storage vault, any of a variety of threats may destroy the data
on such media.An additional factor that can potentially cause concern when dealing with storage media over an extended period of time is that of technical obsolescence.
Type of storage media, software, interfaces, and other factors can affect our ability to read stored data. For example, at the time of this writing, Sony is planning
to end production of floppy diskettes in March 2011, after having been responsible for 70 percent of the remaining production of such media [3]. Although
floppy diskettes are only now completely fading from use, many new computers no longer come equipped with drives to read them. In a few short years,
finding hardware to read these disks will become very difficult indeed.
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