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- [Teacher] Let's show a
little S.M.A.R.T analysis.

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S.M.A.R.T is a monitoring
system that you can use

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to analyze hard drives.

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It stands

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for "Self-Monitoring, Analysis,
and Reporting Technology."

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So it's a monitoring system included

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with most hard drives that
creates reporting data

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which can be accessed

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within an operating system or
outside the operating system.

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So you can view some basic information

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for S.M.A.R.T based

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hard drives in the
Command Prompt in Windows.

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And so for example, we could use wmic

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and we'd run the wmic

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discdrive,

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space,

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get, space, status command.

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And when we do so it tells us
both drives we have are okay.

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What we have two drives on here.

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We've got a two solid-state drives.

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One is a two and a half inch drive,

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that's where the operating system is,

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and the other is an M.2 drive

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where I keep a lot of data.

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So both are okay.

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So you get basic information there.

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So that means Windows
didn't find any issues.

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If you were to get a
message that said "bad"

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or "unknown" or "caution"
or something similar to that

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then you should do some more analysis.

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Now, there's also third-party tools

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that you can use to get
additional information.

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For example, AIDA64

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for Windows,

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the Disk Utility in macOS,

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GNOME Disks for Linux,

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and another program SpinRite.

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One of the problems with S.M.A.R.T data is

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that it can be unreliable at times

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if there's a lack of support

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with the hardware or with
the third-party application.

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And there's a lot of
information that you'll see.

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So you might, some people might

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incorrectly diagnose the data.

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You have to diagnose carefully.

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So let's take a look at another example.

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This is my NAS box,

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so a Synology NAS box,

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and it's running a RAID 1 Array.

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So network attached storage.

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And this is the software to control it

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and to work with it and configure it.

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And from here you can view S.M.A.R.T data.

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So if we go here

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to our main menu and bring
up the storage manager

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we'll see that our system is healthy

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but we wanna get more
information than just that.

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So we'll go down to HDD/SSD.

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And actually both of these
drives are hard disc drives.

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They're magnetic based drives.

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Click on that and we'll see both drives.

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And it says normal for
both, which is good,

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and you could view
information for either one.

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I'll go to Disc 2 and
we'll go to Health Info.

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And of course you'd wanna do this for both

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but we'll take a look here.

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We'll see the health status is normal

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and the S.M.A.R.T status is normal.

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And we can find more information here,

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and by the way

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the temperature 33 degrees
Celsius is normal and good,

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but we can find more information

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by clicking on the S.M.A.R.T Info tab.

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And you can see lots

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of attributes that are tested
by the drive over time.

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So you have to analyze these carefully

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if there is any issues,

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any types of error status,

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but everything is okay for
these drives right now.

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And again, you wanna watch

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for things "errors", "bad",
"unknown", "cautions",

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and so on.

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And we can initiate tests as well.

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So for example, if we're not sure

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or if one of these particular
attributes had a bad status

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we could go to S.M.A.R.T Test

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and run either a quick
test or an extended test

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which will take a long
time and you'd wanna do

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that off hours.

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But we'll run a quick test right now.

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And we'll start that up.

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Takes about two minutes.

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And so we'll let that run
and come back when it's done.

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Okay. And our test completed

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and it shows it completed as normal.

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So we're in good shape here, but again,

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it should have been that way

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because our S.M.A.R.T info is
showing that in the status.

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But once in a while

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you may wanna do an extended test.

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Perhaps every year or so

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cause hard drives will
have a limited shelf life,

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limited lifespan.

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So consider running tests
like this every six months

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or one year. Periodically
run those extended tests.

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Now, sometimes you might be worried

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about a drive that's making noise.

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If you have a magnetic base drive

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that's making strange
noises, or clicking sounds,

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or grinding noises, then
it's not recommended

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that you do one of these tests,

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especially an extended test,

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cause that might just push
the drive over the edge.

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It might cause damage to it.

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That usage of that extended
test could complete

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the damage that's already there.

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So you wanna watch out for
drives making any noise.

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And you wanna watch out
for power issues as well.

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Some of the S.M.A.R.T data that you get

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in the status might not
actually be the hard drive,

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it could be a power issue.

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It could be an underpowered system

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or a system that's on a grid,

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you know, connected

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to some type of electrical
grid that has dirty power,

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and because of that

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we're getting corrupted
files being written

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to the drive and we're
getting these types of errors.

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So you always wanna check
your electrical connection

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at the AC outlet.

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And for a device like this

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I would always connect it to, you know,

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at least a line conditioner usually.

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In this case, this is connected to a UPS,

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an APC UPS,

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so that we have that line conditioning

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for voltage and we have
backup power as well.

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So if, you know, the power goes out

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this won't just shut down.

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It's set actually to
do a graceful shutdown

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after five minutes.

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Well within the battery power of the UPS.

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So, you know, keep in mind
the power could actually

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be the issue when you see some
problems here in the status.

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So there's a little bit
about S.M.A.R.T analysis.

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Check out some of the tools I mentioned

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and also wmic in the Command Prompt

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and see if your hard drive
can do S.M.A.R.T analysis.

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And that's it for this video.