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Memory errors. Hardware?

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I need your advise. I think I have hardware faults in memory and wonder what to do next. This is wat happended:
More crashes en freezes each day. I was using 1.0.04 then. Did an update to 1.0.05 but that didn't help. A few weeks later I could not upload to internal memory any more (Calibre). When connected to PC the partitions (SETTING and READER) showed only after several minutes and when accessing I got read/write errors. In the (Ubuntu Linux) syslog lots of lines like this:

Nov 13 15:40:04 bovist kernel: [15735.172596] Buffer I/O error on device sdh, logical block 944
Nov 13 15:40:04 bovist kernel: [15735.172600] Buffer I/O error on device sdh, logical block 945
Nov 13 15:40:04 bovist kernel: [15735.172604] Buffer I/O error on device sdh, logical block 946


I hoped that formatting would help (maybe would flag bad blocks ...) so I did: Settings > Initialization > Format Memory > Internal Memory. That gave an endless loop. I interrupted it and output of an "ls -l /media/READER" when connected to Linux PC gave:

d????????? ? ? ? ? ? Books
d????????? ? ? ? ? ? DCIM
d????????? ? ? ? ? ? download
-rw-r--r-- 1 nextstep nextstep 258 Nov 9 20:23 driveinfo.calibre
-rw-r--r-- 1 nextstep nextstep 193953 May 29 20:37 metadata.calibre
d????????? ? ? ? ? ? Sony_Reader


So clearly the formatting did not result in a healthy situation. I also tried to format the READER partition in Linux (FAT; I definitely did not touch the SETTING partition). Also gave I/O errors.

I also noticed that Settings > About > Device Information resulted in a freeze. I could interrupt that by pushing the Power button: "The application Settings has stopped unexpectedly. Please try again." Then I could click a "Force close" button. Does this indicate that the SETTING partition is also corrupt? I can imagine that device info in retrieved from there (?).

I contacted the shop. Definitely no warranty any more. PRS-T1 seems to have 1 year warranty. Other models maybe 2 years. I bought my reader 2 years plus een few weeks back :-(

Now I could send it back to the shop and ask for a repair. Maximum costs (for inspection only!) is about 20 or 30 euros. Do you think that there is any chance that they can/will repair memory for a reasonable price? I myself doubt it. I heard the memory on the Sony is soldered on the mainboard (heard that some Kobo's have an internal sD-card). Is this correct?
So I wonder I should send it to the shop.

If I decide not: what can I do myself? Can I boot from some sort of rescue image and try to check the memory and mark bad blocks in it? Any chance of success?
I read something about recovering console in http://wiki.mobileread.com/wiki/PRST...covery_Console and tried the recipe for Linux but could not figure out the serial device name - did not see anything like /dev/tty* with dmesg after connecting the reader via USB. Can anyone give me some clues what to look for?
Any help in getting this thing working again is appreciated. I cannot bring myself to throw it in the bin already.

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