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Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

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101–110 of 221 posts

Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

#101
post #98

Earlier quoted context omitted.

The System on Module board is an Inforce 6601 SOM. [0] It uses a Qualcomm Snapdragon 820 and they provide prebuilt Ubuntu Linaro distros for it, preconfigured for the board. The camera manufacturer likely just tossed it straight in as configured and thus didn't know how the full disk encryption was setup. This whole camera design looks like one of those 'we gave this project to some undergrad engineering students who…

I'll admit I only watched a video on it not the report, but it had pictures reportedly redacted at manufacturer request. It showed a teensy 3 and some adafruit qwiic board in there. Obviously the real engineering is in the enclosure. Otherwise it could just be a webcam. But still, it's clearly not a very in depth electrical design. I'm all for SoMs if you can but they don't guarantee you the adventure of custom hardw…

No serious commercial product should be using a Teensy under basically any circumstance.

Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

#102

I see a lot of discussion in this thread stemming from some confusion+not reading the actual report[0]. Some key points: 1. The Camera+Card was encased in a separate enclosure made of titanium+sapphire, and did not seem to be exposed to extreme pressures. 2. The encryption was done via a variant of LUKS/dm-crypt, with the key stored on the NVRAM of a chip (Edited; not in TrustZone). 3. The recovery was done by transp…

0. They were too cheap to use an industrial grade SD. Mind boggling.

Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

#103
post #8

It continues to amaze me how indestructible SDCards are.

It's a solid piece of silicon encased in epoxy, so there's nothing really to get crushed. Contrast this to something like a cellphone that's made of hundreds of separate parts and has void space that will get crushed.

Are consumer grade cards really reliable though? Not so much against physical damage, but of data integrity over extended periods? "Industrial" SD cards can be 10 times or 100 times more expensive than consumer grade cards.

Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

#105

Earlier quoted context omitted.

To add to that. My son got his phone caught in a reclining chair without realizing it. The fact that the phone bent in half instead of destroying the chair is a nice bonus. Replacing the phone was cheap, replacing a chair would not have been — yes, both are insured, but replacing/repairing a chair takes a hell of a lot longer.

I think most would disagree XD. Phones these days are often more expensive than the chair and can be pretty inconvenient to replace, especially if you have nonrecent backups.

Yeah not sure about you guys but me and everyone I know buys their stuff in ikea where a chair definitely doesn't cost more than a good cell phone

Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

#106
post #8

It continues to amaze me how indestructible SDCards are.

It's a solid piece of silicon encased in epoxy, so there's nothing really to get crushed. Contrast this to something like a cellphone that's made of hundreds of separate parts and has void space that will get crushed.

So were the flash chips on the SSDs they found. It didn’t save them.

Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

#107
post #43

Since not everyone reads articles: > Somewhat disappointingly, the images and videos shared in the report were taken in the vicinity of the ROV shop at the Marine Institute, also in Newfoundland. The location was the logistical base for Titanic dive missions. No deep-sea shenanigans around the Titanic wreck were revealed.

Wouldn’t it have been streaming it to disk without creating the file? Kinda like how if your camera dies while it’s recording, there is no recording. You have to manually recreate the file.

I think that’s what they think. It was being recorded by the onboard PC to its SSDs, which were completely destroyed in the implosion.

Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

#108
post #28
post #18

But how did anyone figure out it was a SanDisk SD card? Card details were redacted.

Presumably because it looks identical to a Sandisk extreme pro 512gb, with grey boxes drawn over the logo.

The report has a heavily redacted interview with a submarine expert. Who directed Titanic and The Abyss.

They’re not good at redacting.

Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

#109

Earlier quoted context omitted.

There are some reasons you'd want to encrypt even without a secret key. One is it makes it easier to erase data (just erase the key). It also makes bit flip errors a lot more obvious, which is another way of saying harder to ignore, so that can go either way.

Can't bit flip errors also destroy encrypted volumes much more easily?

I think it depends. Encrypted filesystems typically encrypt contents of each file separately - that way you don't need to read / write the whole disk to read it write any individual file contents. Of course that means metadata may be in plain text or may be separately encrypted - again possibly folder by folder instead of all metadata at once. Exact details would vary with different file system encryption schemes.

Whereas if you image the disk and encrypt the image properly, that gives you all the great confidentially guarantees but no random access.

Re: Titan submersible’s $62 SanDisk memory card found undamaged at wreckage site

#110
Figure 3 from the report- that's an Adafruit sensor module on a 3d printed bit of plastic with a teensy-brand microcontroller just sitting in there! Actually, the entire electronics enclosure appears printed.

Very funny to see in what I assume is a million-dollar product.

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