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Thread: 6.2.1 .xsession-errors

  1. #31
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    Quote Originally Posted by utu View Post
    @mecho, re your post #27

    Is there any way to know how many writes have been made
    to a flash card? Or how many are left?
    FWIW - I found an article online a while back (ZDnet) that referenced a study of flash memory durability, stating that "cheap" flash didn't do well, but "name brand" device wear not only exceeded the usual life expectancy (100,000 cycles), but in fact showed no signs of wear - even far beyond that point. Those quality devices have built in anti-wear write algorithms and will seemingly live forever (almost.)

    Cheers!
    Krishna

  2. #32
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    @krishna

    Hi, Krishna.

    I was hoping one of you smart folks knew some magic command
    that would tell me how many write cycles I have left before
    my SD Card self-destructs.

    On HDD's there is some 'smart' logic that gives you some idea
    of the health of an HDD. I was hoping something like that
    applies to flash as well.

    My SD Cards cost $7 each, so it's not a crucial item. I just
    like to be prepared.

    mecho is working hard to conserve his write cycles. That makes
    me think perhaps I should worry too.

  3. #33
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    There is no way really to find out the write cycles of usb flash drives. For this to be possibles they should have some kind of s.m.a.r.t capability built in similar to the hard drives. As Krishna said there are flash drives that can withstand even more then 1 000 000 cycles, but I doubt mine is one of them . There 2 types of flash memory MLC and SLC - SLC being much faster and having longer life, but more expensive. I can not find what type I have And because my laptop has very bad hard drive I use flash 100% of the time - my OS is on it, and I use the HDD only for back-ups and permanent storage

  4. #34
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    @ utu:

    Hopefully you got a name-brand; AFAIK, they put their effort into making the SMARTs on the flash keep the flash chip going - and going, and going...

    Cheers!
    Krishna
    Last edited by krishna.murphy; 08-10-2010 at 04:02 AM. Reason: clarity

  5. #35
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    The attachment, if all goes well shows SanDisk examples
    of Flash Card lifetimes in decades, centuries and millenia.

    Cheers

  6. #36
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    @mecho & krishna

    Oops, my bad.
    File too big for upload.
    Go to SanDisk site and look for WPaperWearLevel1.0-1.pdf.
    This is a 138k pdf file.

    Some neat equations, too.
    Last edited by utu; 08-10-2010 at 03:34 PM.

  7. #37
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    19.5k is a pretty stingy limit for pdf files.
    Who do we know in management we can complain to?
    Last edited by utu; 08-10-2010 at 03:44 PM.

  8. #38
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    Quote Originally Posted by utu View Post
    @mecho & krishna

    Oops, my bad.
    File too big for upload.
    Go to SanDisk site and look for WPaperWearLevel1.0-1.pdf.
    This is a 138k pdf file.

    Some neat equations, too.
    I don't see anything with that name, anywhere on the web (except in this post!) Perhaps you could send the link.

    Cheers!
    Krishna
    Edit/p.s. I eventually found it here, for the reading pleasure of all.
    Last edited by krishna.murphy; 08-10-2010 at 08:18 PM. Reason: More data

  9. #39
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    Enter 'sandisk wear level' in google search box.
    It's the first return entry.
    URL is too long to contend with.

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