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even though super fast solid state drives or ssds are all the rage for high
performance pcs these days you still
can't beat a good old-fashioned mechanical hard drive if you need lots
of storage space for not a lot of money but which one do you choose even though
hard drives are all relatively slow compared to ssds you'll still find that
they vary in price performance and features and this isn't just due to
differences in how fast they spin
although that is a significant factor so
the spindle speed denoted in RPM is how many times the disc platters rotate per
minute so all other things being equal then the faster this is the faster data
can be read and written and the lower the seek times or latency are but all
other things aren't equal you see for example some hard drives are made to be
tougher than others you'll often see these marketed as nas grade enterprise
or surveillance drives the idea is that
for these kinds of applications the hard drives they don't get to spin down and
go to sleep like they would if they were installed in a typical desktop they have
to be up and running around the clock i mean think about how web servers need to
be able to serve content 24 hours a day or how surveillance cameras have to
constantly record footage but how exactly do you make a hard drive tougher
and is this a feature that's worth paying extra for let's start by looking
at a simple way that drive manufacturers stabilize their server grade products
they will actually attach the motor that spins the platters to both the top and
the bottom of the drive's housing consumer hard drives by contrast often
anchor the motor only to the bottom of the unit this extra stabilization is
important because nas's and servers typically have many drives spinning and
clicking away next to each other in close quarters which means more
vibration higher end drives also try to avoid
errors with more precise actuators that move the reed and right head around the
disc they'll incorporate stronger magnets inside that can accelerate the
head more quickly and the heads themselves will even be narrower this
means that the empty space between data tracks on the platter can be made
physically larger giving the drive a larger margin for error in the event
that something like a sudden physical shock occurs
and when things do go wrong higher end drives can to an extent compensate for
mishaps many of these hard drives have built-in sensors that can detect shocks
vibrations and even temperature changes which will tell the drive to adjust how
the head positions itself over the platters preventing the drive from
slowing down too much some of them can even get rid of problematic air bubbles
that can form inside the fluid dynamic bearings that helped the platters spin
so that's all pretty cool but if you just need more storage for
your steam library you probably don't need anything more than a typical
consumer grade drive as it won't be exposed to either the physical risks or
the demanding workloads that the more expensive drives are designed for so for
you the viewer it probably does just come down to
performance capacity and price
with that said if you're running a home nas to serve media within your home or
even over the internet a nas drive is probably going to be a good choice and
these can even be a good bet if you're running a raid array in your pc since
the drives tend to be quite close together and nas drives are built to
withstand vibration or if you know for a fact you're only using this hard drive
for archival purposes where you'll be writing to it once and then only really
reading from it over time shingled magnetic storage drives can be a good
bet they're much slower to write to but their read speeds are more than
acceptable and they do tend to be cheaper because manufacturers can get
more density out of the platter by actually overlaying tracks on top of
each other just like shingles hence the name the last edge case for home users
is probably surveillance drives which i guess leads us perfectly to another key
but not very obvious difference from one model to another
firmware hard drive manufacturers can optimize their devices for better
performance in certain workloads and surveillance drives are designed to
handle many simultaneous streams of data concurrently in a way that drives that
were made to boot your operating system simply can't their read speeds might be
a little bit slower but a good surveillance drive will make it more
likely that you can get a positive id on that guy who took your who pudding and
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for watching guys like dislike check out our other videos don't forget to uh oh
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