is there a separate boot track/partisan to dos then? cause if you hit F8 on boot it lets you boot straight to dos or is that still just a process over a windows os??? thx...
Posted on 05/10/2008 6:02:08 AM PDT by shove_it
Jon Edwards often manages what appears impossible. He has recovered precious data from computers wrecked in floods and fires and dumped in lakes. Now Edwards may have set a new standard: He found information on a melted disk drive that fell from the sky when space shuttle Columbia disintegrated in 2003.
"When we got it, it was two hunks of metal stuck together. We couldn't even tell it was a hard drive. It was burned and the edges were melted," said Edwards, an engineer at Kroll Ontrack Inc., outside Minneapolis. "It looked pretty bad at first glance, but we always give it a shot."[...]
(Excerpt) Read more at news.yahoo.com ...
Presumably, that is above the Curie point for magnetic recording media.
Now I'm wondering if some of the floppies whose cases curled/warped during our house fire might not still be readable...
Don’t confuse CMD.EXE with DOS - that is actually a DOS command shell running on top of Windows, not the other way around.
is there a separate boot track/partisan to dos then? cause if you hit F8 on boot it lets you boot straight to dos or is that still just a process over a windows os??? thx...
That’s a warning to all those money launderers that the info is out there and some how some way it will be recovered.
That's going to be pretty subjective. Whoever made these drives may have to best coating on their drives measured by how well they retain data when overheated. Gaining that may be at the expense of data capacity or access speed. Unless you can afford what it costs get data off a failed drive, for backup media you'd probably be better off looking at criteria like the reliability of the electronics and mechanical components, than the thermal resiliance of the surface media. MTBF is supposed to be an objective measure of that, but I take weigh manufacturer's numbers against their reputations.
Looks like the drive got hot enough to desolder the surface mount IC shown in the foreground.
Interesting that the heat didn’t demagnetize the platters.
Come to think of it, I used an early IBM DOS for a while. It was an operating system for the IBM System/360 computer line.
You also had the option of “TOS,” the Tape Operating System.
[Just to be clear, the DOS mentioned above appeared about twenty years before the PC’s DOS and had nothing to do with it.]
Can you imagine today's media reaction to such a speech as Washington gave 200 years ago?
"well,i mean,he used, like, lots of big words nobody knows,uhhh, ...let's go to Dan for commentary..."
Time to update the Bradbury classic!
I hear the best way is to drill multiple times through all the platters. Or a very strong magnet.
Why is that?
The (apparently paper) stickers on the outside of the HD case are intact. If they are, indeed, paper, that means the exterior of the case never reached Bradbury's classic Fahrenheit 451"... '-)
The kapton film that the IC was mounted on can withstand short-term temperatures in excess of the melting point of solder. That’s how they attach the IC.
To get accelerated off the substrate, it would have taken probably 1000 G’s, and the chip and stubstrate would have ended up in tiny little pieces.
I was thinking along the lines of the new way to store books, and “Fahrenheit 361.”
< }B^)
I wonder whether it was the shock of impact, the heat melting the solder, or both that caused that IC chip (bottom of the second picture) to become loose like that.
The solder doesn’t look like it was flowing so it’s possible that the chip sheered off the board from the impact or the solder might simply have softened a little and then the impact popped it off. But if it really melted, I wouldn’t expect the remaining solder on the board to be so neat.
An esoteric piece of info, a 340mb drive will be broken down into 4K-8K chunksin DOS so the data could be recovered in large contiguous chunks.
Assuming the use of 63/37 Pb/Sn (eutectic) solder, that drive saw temps in excess of 183C.
I was misthinking the chip was a plug in, like a card. D’oh!
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