Per Jessen said the following on 05/16/2011 05:32 AM:

I'm pretty certain harddrives are supposed to take (quite a bit) more than 1G - I think your drive might well still work. Maybe it's just the cable or a connector or something.

On the whole I agree. But take this as a datum: We once measured the impact of a PCB/case that fell from the workbench onto a concrete floor -- 40G. Now that will be moderated if the floor is less hard - wood, carpet or grass. And don't forget, that's the FRAME impact. Instantaneous deceleration. Anything inside a box is like a passenger in a car wearing a seatbelt. The 'stop' isn't quite so instantaneous. When we used boxes and had the accelerometer on the equipment inside rather than hard-strapped to the frame we got results like those Per talks about. I've dropped laptops from desks onto office floors. The result was a cracked case and machine that would not boot But on opening it and re-seating the board and components everything was fine. Another ended up with a cracked screen - that was more serious. Of course of the impact twists the board (or the board with the electronics on top of the drive) and cracks it, that's another matter, and one that can occur in other ways. Just don't try tossing your older CRT-based monitors around :-) -- What is written without effort is in general read without pleasure. -- Samuel Johnson -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Per Jessen wrote:

Anton Aylward wrote:

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Per Jessen said the following on 05/16/2011 05:32 AM:

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I'm pretty certain harddrives are supposed to take (quite a bit) more than 1G - I think your drive might well still work. Maybe it's just the cable or a connector or something.

On the whole I agree. But take this as a datum: We once measured the impact of a PCB/case that fell from the workbench onto a concrete floor -- 40G.

I did think of that, but I had no idea what sort of Gs we might be talking about.

Harddrives are quite sturdy - this is from a fairly recent Seagate 2Tb drive: http://public.jessen.ch/files/seagate-350g.jpeg 40G? Not a problem. -- Per Jessen, Zürich (13.8°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Greg Freemyer wrote:

On Mon, May 16, 2011 at 7:58 AM, Per Jessen wrote:

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Per Jessen wrote:

Harddrives are quite sturdy - this is from a fairly recent Seagate 2Tb drive:

http://public.jessen.ch/files/seagate-350g.jpeg

40G?  Not a problem.

Per,

That depends if the head is flying or retracted.

You may know that many modern laptops have a G sensor. The goal is to identify free fall (0 G) and issue a head retraction command before the drive hits the ground.

Hi Greg I didn't know that - I hope we have Linux support for such sensors :-)

I don't know of any external drive cases that have similar capability, so if they are dropped while powered on, they will likely have a head crash. That is often a end-of-life event!

Good point, I hadn't considered moving a drive whilst powered on. -- Per Jessen, Zürich (15.5°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Greg Freemyer wrote:

You may know that many modern laptops have a G sensor. The goal is to identify free fall (0 G) and issue a head retraction command before the drive hits the ground.

No, it's a con(-spiracy) by laptop manufacturers to make NASA et al have to buy special expensive orbit-proof laptops instead of regular commercial ones. :) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Dave Howorth wrote:

Greg Freemyer wrote:

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You may know that many modern laptops have a G sensor. The goal is to identify free fall (0 G) and issue a head retraction command before the drive hits the ground.

No, it's a con(-spiracy) by laptop manufacturers to make NASA et al have to buy special expensive orbit-proof laptops instead of regular commercial ones. :)

Isn't such a laptop (that refuses to operate the harddisk in 0 G) going to be a bit of an issue in orbit? -- Per Jessen, Zürich (17.4°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

On Mon, May 16, 2011 at 3:31 PM, Felix Miata wrote:

On 2011/05/16 18:51 (GMT+0200) Per Jessen composed:

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Dave Howorth wrote:

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 Greg Freemyer wrote:

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 You may know that many modern laptops have a G sensor.  The goal is  to identify free fall (0 G) and issue a head retraction command  before the drive hits the ground.

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 No, it's a con(-spiracy) by laptop manufacturers to make NASA et al  have to buy special expensive orbit-proof laptops instead of regular  commercial ones. :)

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Isn't such a laptop (that refuses to operate the harddisk in 0 G) going to be a bit of an issue in orbit?

You really think NASA's laptops would use lowly HDs instead of much more expensive SSDs?

By SSD, do you mean core memory from the 60's? Everything I've ever heard about NASA is the tech that goes up to space is typically 10+ years old on the day of launch. So, a modern SSD seems way too new for them. FYI: They did have a traditional rotating disk on the Challenger that exploded 25 years ago. I think this is a picture: http://blogs.newsgator.com/photos/uncategorized/2008/05/12/challenger_drive_... And yes, they did get data off of it. Greg -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2011-05-16 13:38, Anton Aylward wrote:

Just don't try tossing your older CRT-based monitors around

A shop owner demonstrated to me how good the packaging was by throwing around a box with a CRT inside... - -- Cheers / Saludos, Carlos E. R. (from 11.2 x86_64 "Emerald" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org/ iEYEARECAAYFAk3RbRcACgkQtTMYHG2NR9Xy5wCcDIygjNAKGrxdwxEBMwkZ5udM MFgAn3CvzLg5WkdVwgPhW1QI+xCROsSC =V7jy -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

On 16/05/11 12:13, Felix Miata wrote:

On 2011/05/16 11:02 (GMT+0200) James Hatridge composed:

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I got one of the cheap IOmega 1tb external HDs. Well I drop the !"§$! thing and now it will not work. Do you guys think if I break it open that the disk might still be usable? I really would like to get my data off the disk.

I'd say the odds are quite high that thing has a standard HD inside that you can take out and connect directly to a motherboard port, or put inside a generic external case to use as USB, Firewire or eSATA.

Beware it might be a 2.5" notebook size drive rather than the standard 3.5" desktop form factor. Unlikely for a 1TB drive, but based on the dimensions of the case you should be able to tell. If its 2.5" and SATA the connections will still be the same, but it won't fit nicely inside any docks / your desktop case. Tejas -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Hi all,

On 2011/05/17 07:45 (GMT+0200) James Hatridge composed:

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Thanks to everyone! I broke open the case and put the HD in my system and it works fine now.

What did you find inside? WD? Samsung? Seagate? Hitachi? Brandless? Other? SATA?

Does it have a typical branding label on it, complete with date of manufacture? Or was it an Iomega label, or no label?

How easy was it to break open?

It was easy to open, it was just snapped together. It had a good Samsung Sata HD in it. I put it in an empty 3.5 slot I had in my system and plugged it in. All I had to do was give it a mount point. Now it works fine. JIM -- The US was colonized by the religious, political, economic, and criminal rejects of every country in the world. We have been carefully breeding insane, obsessive, fanatic lunatics with each other for over 400 years, resulting in the glorious strain of humanity known as "Americans". You have to expect some... peculiarities. -Mark Damon Hughes -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org