Electronics, Flash memory, Computer Data recovery from a USB drive that is not showing up.

The case is very interesting because uh um this is a will dispute. So uh the family found this usb drive and they think there’s a wheel on here um. But the drive is not working so it’s, a very simple job, simple controller, so we’re just going to pull the chip off from this drive and put it through vnr and see. If you can recover it, maybe we’ll use flash extract, we’ll see let’s get to it. First and see how we can recover data from this failed. Usb drive, hey what’s, going on uh got another case of flash, and i got two more coming after this video uh. But this one’s gon na be quite simple: it’s, just an eight gigabyte, uh lexar product of china, of course um so here’s the drive here’s the drive, so simple configuration controller and one tsop chips. The controller is a very simple to work with um it’s, an sm3253l uh very easy to work with so uh it’s gon na be a simple job, so let’s get it going, i’ve already tested the drive, it shows up as um just um. It just says the controller serial number but that’s about it. I did some other testing on it. Unfortunately, this one won’t be recoverable uh by just plugging it into usb we’re gon na have to pull the chip and we’re gon na use, either vnr or flash extractor i’m, not sure. Yet, whatever works that’s, what we’re gon na use.

Let me just adjust the camera here, a little bit okay. So the first thing is the usual just getting some low melt, paste and uh, applying it um to the legs here on on both sides of the chip which two i’m gon na use. Today, maybe the exact knife yeah, why not so i’m sure you’ve seen my other videos you want to avoid using too much heat on the chip so i’m going to use low mix. So you know what maybe today i thought something different. Maybe today i’m going to use a bottom heater, i don’t know switch it up a little bit good enough. So let’s get the bottom heater out and try that okay. So we got a bottom here here whoops once we get our bottom here, we’re going to put the drive in the bottom here i’m going to adjust this guy here, put a bit of flux on here, all right again: here’s the bottom heater and this stupid thing. Isn’T working there it is, you can see the display here so we’re gon na set it to probably uh. I don’t know 170.. I think it’s, a safe Music number and let’s see if we can get this guy off here using the bottom here. Let’S do two pairs of tweezers Music. I see some bubbling bubbly bubbly, okay we’re. Almost there yeah yeah it’s getting definitely getting uh. So one side we got and uh the other side and that’s it that’s.

How simple that was with the bottom heater and now we’re gon na flip, this thing off literally flip it off and we got ta move this thing off here: Music, let this thing cool down and here’s a chip. I just need a little bit of cleaning and that’s pretty much it for soldering let’s get some stuff. Okay. Now we need a little bit of um. Go trusty get some of these better soldering situation happening here and uh let’s clean up these legs i’m using uh 460 degrees. Here i don’t want to damage these tips. These tips are very expensive. So at the beginning i was using a very high temperature on these, and someone told me that you should drop the temperature if you want these tips to last longer. So since i’ve dropped, the temperature i’ve been getting a lot of use out of these and besides, why introduce so much heat to the chip on top of that right? Okay, now, just the other side, Music. Okay, that should be good. Now we just clean it up with some alcohol there’s, a lot of flux here, so let’s get this flux out of here. Okay, let’s inspect this chip now under the microscope, so i definitely want to get all that flux out from the crevices there. I mean it’s, not a big deal but it’s my ocd kicking in here yeah. I think that’s looking good. So a few legs needs um. Straightening out let’s get this guy turned over, so let’s see what we have out of alignment.

So this one here, okay, these tweezers are dirty as hell. Okay, let’s keep looking here, so this guy here needs a bit of adjustment and other than that. I think this is looking uh, pretty good, just a few more brushes with the uh brush here. One side – and i see one of the legs is still bent. You know. Flash extractor is a bit finicky with their reader, so you don’t want these legs to be out of alignment, so i just straighten them up a little bit here. Okay, i think that is time to look pretty good, so that is it that’s. The chip removed only eight gigs, so there’s only one chip there. It is here. Another chip here see the camera catches focus on this. It probably let me get some arms in the way. Is it? No? I don’t want wild hands screw that okay here the chip nicely done. Let’S, go over to vnr let’s, put this in the reader and go over to vnr and get this done Music all right, so it wasn’t as simple as i thought it was going to be. That was a bit of an issue um with vnr, so i had to go into flash extract to play around with a little bit and then come back to vnr. I went to the structure so anyway, let’s go see how this was done. So the first thing is, we have to check the configurations the chip was detected.

Configuration was okay, uh played on the voltages a little bit. I looked at the um, the dump and it looked good sorry, nothing but the chip itself. There was some errors there. You can see those white dots uh around there. It doesn’t look too bad it’s there’s, some chips that just looks horrible anyway, i’m dumping, the binary of the chip and i’m just looking for some data, so the dump looks good uh calculate the page size and then the next step to do here is to build A structure of the uh of the flash, so there’s gon na be uh data areas and the air correction section so i’m, just looking for it here, just to figure the size and here’s the size. So now i’m, just gon na copy and paste everything down. Uh. The last thing to do here is to set up the system area, and this system area also has error correction. So we got ta. Add that in as well. So when that’s done we’re going to find error correction, we know the size now, so we can uh. Try some we can see here there’s a bit of a problem there at the end, so you just have to correct it a little bit and when that was corrected, you can see it’s green. So as it looks pretty good now, i was thinking this drive might have er sore uh, but i didn’t uh you’ll, see me in a minute trying to figure out the saw on this flash drive, but that was luxor uh, not soaring here so i’m.

Just using my method of um using markers table to find xor see i’m just trying out different ones, but, like i said no, no xors on this on this flash drive. Um i’m almost done here now, i’m doing error correction. We have to correct errors. This went really quickly. Usually this is slow. This takes days. Sometimes this is so fast there’s, no data there’s, nothing to correct uh. Now it’s, just marker, stable, uh, setting everything up and uh somewhere around. Here i had a problem, so i switched over to uh flash extractor. I want to see uh if i can get a better structure, so there’s a lot of help on the fe forums. If you need help, if you do have flash extractor, if you do buy it uh, if there’s a lot of people there who have maybe similar case to yours, you can go there and you can uh ask for help. Circuit can also help you, if you’re paying uh the support uh for um for flash extractor, but now i’m back in vnr, again uh. I was trying something else again: there’s a lot of stuff that actually happened after i stopped recording um because at the end of this case, you’re gon na see that i actually finished the case in uh flash extractor, but i still wasn’t happy with the results. So i ended up going back into vnr and finishing the case in dnr, but i didn’t record it so we’ll keep going here, and here we are back in fe and there is the data right there.

I had to blur the filenames but that’s the job finish anyway, thanks for watching uh, another flash video coming up next week and then probably one after that anyway, thanks for watching, you know what to do like it share subscribe all that stuff.

What do you think?

Written by freotech


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