30 October, 2014

Your smartphone autorestarts, you lose data? Possible problem, internal memory damaged on your smartphone

I had a Samsung Galaxy SCL i9003 began to malfunction; I just restarted, lost contacts, program settings, etc. 
After searching the web, it turned out that the internal FLASH memory chip, using, being of low quality, began to fail. 
Such memories theoretically not lose their data for up to 10 years, but if damaged by use (allow a limited number of cycles, about 100,000 or more), you may not withhold good data and "forget" . It can happen to any phone that uses them, and sooner or later any "smartphone", tablet, ebook, etc with internal flash now have this problem.
To check it, it is best to use this freeware program h2testw . We connect the phone in "mass storage" mode and run mode continuous writing and then read until an error appears, checking the box for "endless verify" (to select target drive select):

For me it took me two hours to give the error message that a party had failed:
. The media is likely to be defective 1.5 GByte OK (3188735 sectors) LOST DATA 0.5 Kbytes (sector 1) Details: 0 KByte overwritten (0 sectors) 0 KByte slightly changed (<8 bit / sector 0 sectors) 0.5 KByte corrupted ( sector 1) 0 KByte aliased memory (0 sectors) First error at offset: 0x0000000026ca0000 Expected: 0x0000000026ca0000 Found: H2testw 0x866804f043425355 version 1.3 Reading speed: 18.8 MByte / s H2testw v1.4
It was under warranty, but the service the first time I returned, I had to give it back, enclosing a sheet with the same analysis to verify it themselves. It is unacceptable not thoroughly test a mobile that you get back from that point to failure of memory; they just updated and if you were to use so I would spend the same, losing programs, contacts, etc ... 
Finally I changed it with a new one, but they could also just change the motherboard. 

If you do not have collateral, you can always try this method, which involves canceling the internal memory card and use only the external SD and internal memory, as indicated by at XDA Developers . 

  1. Remove the faulty memory (pull it from the motherboard, is the largest of all chip, see the photo on XDA).
  2. If the phone does not start, reinstall one rooteada ROM or rooted kernel (in this blog are no entries on how to do ).
  3. Replace system / etc / vold.fstab by this other using Solid Explorer for example.

It also seems that there is another option without removing memory fitness . Luck! 

Update: Apparently also happens to Gallaxy Samsung S3 ; a model of memory chip is damaged at 5 or 6 months of use, probocando a 'sudden death' not booting the next time. I fear flash memories are not prepared for the job that submits the Operating System ...

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