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 Post subject: Good time to get rid of older hard drive?
 Post Posted: Mon Oct 21, 2013 7:07 pm 
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Scott, when would it be a good time to get rid of an older hard drive that seems to be working OK for the time being, particularly when its not a RAID-class drive, a solid-state drive, or a hybrid drive?


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Mon Oct 21, 2013 7:24 pm 
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I only get rid of one when it exhibits any signs of failure, or is of insufficient capacity do the job and I don't think I'll need it as a spare. When that happens I like to take them apart and save the platters and magnets. Scott.


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Tue Oct 22, 2013 10:20 am 
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Would a 40GB hard drive be inadequate in this day and age?

There is such a thing as "the click of death," right?


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Tue Oct 22, 2013 11:01 am 
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Quote:
Would a 40GB hard drive be inadequate in this day and age?

That depends on your requirements. One of my servers with 4TB of data storage currently boots from a 40GB drive and that drive still has 30GB free (only 10GB are used), so for that system even a 20GB drive would be more than adequate.

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There is such a thing as "the click of death," right?

Failing hard drives can make many sounds including clicking, clunking, knocking, chattering, screeching, screaming, squealing, humming, buzzing, thrashing, grinding, scratching, beeping and even siren sounds. Scott.


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Tue Oct 22, 2013 11:40 am 
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If I has a single spare 40GB drive I'd use it to backup my most precious files and leave it in a drawer.


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Wed Oct 30, 2013 12:18 am 
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Quote:
When that happens I like to take them apart and save the platters and magnets.
I know what you use the magnets for, but what about the platters? And do you have any specific tools you like to use?
Evan


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Wed Oct 30, 2013 12:14 pm 
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I don't really have a use for the platters, I just think they are cool. They are perfect mirrors, and outside on a sunny day you can create some amazing solar beams. They are so perfectly smooth that in some cases when stacked the stiction will be so severe that they can be very difficult to separate. Most HDDs are assembled with TORX screws, so you will want a good set of TORX bits to remove them. Newer HDDs use several of the smaller sizes T5 through T10, which are not common at most places that sell conventional tools. Scott.


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Thu Oct 31, 2013 12:43 am 
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Thanks for the heads up on Wiha tools. Do you think $10 for an IDE HDD just to take apart is worth it?

Evan


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Thu Oct 31, 2013 10:01 am 
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When I look at the pile of old drives I have laying around here I'd have to say no! Tell a few of your friends and associates that you'll be happy to recycle any old computers they have and soon enough you'll be inundated with them. Scott.


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Tue Nov 19, 2013 8:26 pm 
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I just took apart server HDD that was going to be shredded. The actuator magnets are super strong. Are there other magnets you retrieve from old HDDs?

Evan


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Tue Nov 19, 2013 8:36 pm 
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That's it, the actuator magnets are ones we're talking about. The hard part is separating the magnets from the metal backing plates they are often glued to. I use a very thin knife and a small hammer to tap it in-between the plate and the magnet. Sometimes the glue will take off some of the protective coating on the magnet when it comes off. In some cases I just leave them on the backing plates. Scott.


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Tue Nov 19, 2013 9:21 pm 
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Quote:
The hard part is separating the magnets from the metal backing plates they are often glued to.
Looks like that is where I'm at...

Evan


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Tue Nov 19, 2013 9:33 pm 
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I think I need a knife...


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Actuator Magnet.jpg
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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Wed Nov 20, 2013 1:11 pm 
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Evan wrote:
....what about the platters?....

Thanks Evan. That is exactly what I was going to ask. :-)


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Wed Dec 11, 2013 9:43 pm 
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I've noticed at least three different sizes of magnets in a few different 3.5" drives. Are the larger magnets needed for faster seek times or higher areal density? The two smaller magnets came from single-platter 7,200rpm desktop drives while the larger one (pictures above) came from a multi-platter 10,000rpm server drive.


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Wed Dec 11, 2013 10:14 pm 
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I believe the magnets are sized primarily according to the mass of the actuator assembly, which includes the voice coils, arms and heads. Given everything else being equal, I would expect drives with faster seek times to use somewhat larger magnets as well. Scott.

PS: You can get powerful NIB magnets in various shapes here, including some that are so strong they are considered dangerous.


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Wed Dec 11, 2013 10:29 pm 
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Like I said, the server drive 3 or 4 platters with a head/arm for each side plus it had a higher rpm. Interestingly the other two magnets come from the exact same model drive. They are both a Seagate Barracuda 7200.9 80GB drive. The only difference (on the label) other than serial numbers are the mfr date and site code. One has a manufactured in Thailand in Feb. 2007 and it's magnet has about twice the surface area as the one manufactured in Sep. 2006. I wonder if it's just a supply/demand issue or the actuar arms are different.

I have about a dozen or so more of these left so maybe I can find a trend.


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Wed Dec 11, 2013 11:03 pm 
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I'll take two of these, please.

Evan


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Thu Jul 03, 2014 5:14 pm 
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I know this an old thread, but I have to ask.... what are the magnets so useful for?

I can't remember the last time I needed a magnet, let alone one so powerful it might hurt me!

Just curious.

Mike


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Thu Jul 03, 2014 5:41 pm 
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If you search around the forums enough you'll find several examples from Scott as to their money saving uses in cars to the not so legal uses by others (assuming hyperlinks still point to valid info).

Evan


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Thu Jul 03, 2014 7:24 pm 
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I use them on engine oil filters, transmission drain pans and differential inspection covers on all of my vehicles. Scott.


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Sun Jul 06, 2014 5:39 pm 
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Thanks Scott,

I have absolutely no idea how magnets would be useful in the scenarios you describe, but that's down to my complete ignorance of how automobiles work! I just take mine to a local garage.

What I would say to the original poster is this. Would you find a 40gb USB drive useful? If so, why not a spare 40gb hard drive - especially if you already own it. Just put it into a USB caddy and it's ready to go. Personally I don't bother screwing the case together, so I can swap drives in seconds.

M


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Sun Jul 06, 2014 6:38 pm 
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Mike! The Magnets are used to catch small metal filings in the oil, when the... Oil does not catch all the filings.

Yeah.

I'd advise you change your oil. I'd find the correct oil by getting on the forum of your car and asking that question as your first post.

;)


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 Post subject: Re: Good time to get rid of older hard drive?
 Post Posted: Sun Jul 06, 2014 7:15 pm 
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Thanks David,

The oil gets changed regularly. I just leave it to someone who knows what he's doing!

Odd how we ended up discussing motor oil in a thread about ageing hard drives though....

Mike


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