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Thread: 12.2 checksum errors durinig installation?

  1. #1

    Default 12.2 checksum errors durinig installation?

    Okay, i am a little confused.

    I was trying to install OpenSuSe 12.2 after downloading the ISO-Image from the main page. But when the installation was about to begin there were several errors, telling me that the checksum of some packages was not in order and that there was a risk, there might something wrong with them (that someone tempered with it). That seemed improbable, since i downloaded the image from this very site.

    After some searching somebody in a forum suggested that there might be a problem with my RAM and i should do a Memtest. (Maybe you can see, where this is going...). I tested the Ram and it should be a lot of errors during Memtest86+ Step 7. I tried several combinations of RAMs and still got the same problems. This wasn't totally out of the question, since my main reason for the installation of 12.2 were some stability issues with Windows XP (which didn't show up after a reinstall of XP, by the way).

    So i thought maybe the Motherboard is defect. For some reason i decided to check the Memtest on a different machine. With the same errors...

    On these forum i found out, that there is an annoying bug in Memtest86+, so the test didn't prove anything...

    Since i have no instability issues right now, is there any explanation for the checksum-problems?

    Is something actually corrupt? Is the checksum-test buggy? What should i do?

    Also, just to ease my mind (my paranoid mind sees viruses everywhere...): Is it normal, that my second PC had a PC speaker beep, when the 12.2 boot menu showed up, while my first PC didn't. Is this beep normal behaviour?

  2. #2

    Default Re: 12.2 checksum errors durinig installation?

    Verify your download was okay:

    http://en.opensuse.org/SDBownload_help#Checksums

    If so, verify your burned media (presumably using a DVD) also is okay
    using the media verification when booting from the DVD from the DVD ooot
    menu as I recall (before installing). If that's okay, something else is
    amiss; you should not be getting errors about package verification and
    it's probably some kind of random corruption. Perhaps try the USB stick
    method mentioned on that page.

    Good luck.

  3. #3

    Default Re: 12.2 checksum errors durinig installation?

    Since i don't have the ISO-File anymore. I just burned it to DVD and then deleted the file. (Yeah, stupid, i know). If i select "Test installation media" from the disc, it crashes... So i will redownload the file and check it, before burning again.

    What is the possible reason for this? I thought downloads were supposed to be reliable these days?

    So am i in danger of somebody corrupting my system? Or is it just a usual irregularity, that happens from time to time?

  4. #4

    Default Re: 12.2 checksum errors durinig installation?

    Happens from time to time. Downloads are as reliable as ever, but that
    doesn't mean things have always been perfectly reliable. TCP does a good
    job of ensuring things aren't corrupt, but applications could have bugs,
    or bits could be inadvertently twiddled before/during/after being written
    to the disk (yes, this is pretty rare) or there are a bunch of known
    issues with burn speeds and data readability; long story short, verify the
    download, then verify the slowest burn possible was valid (most burners
    have a checkbox to 'Verify Written Data' or something which makes the
    total time go up, but it's always worth it), and then usually you're fine.
    Usually.

    As a single data point, I haven't had a coaster from a DVD in quite a few
    years, but if you search back through this one forum you'll find a lot of
    others who went through your same situation in some form or another. I'm
    just one person, and there are thousands of openSUSE users (at least) and
    most of us download ISOs multiple times, so it probably happens less often
    than it seems, but people rarely come to this forum just to share,
    "Everything went swimmingly; k, thanks bye" since these are forums to help
    with problems. ;-)

    Anyway, to rule out download problems use protocols made to handle larger
    downloads more reliably (metalink/torrent instead of http/ftp).

    You can always verify your current burn (though I wouldn't bother since
    you already have errors) after the fact using dd to read from your DVD
    device and then piping the output through 'md5sum' or 'sha1sum' or
    whatever you choose to use for comparison. It's pretty geeky to do this,
    but it's a little fun too.

    Good luck.

  5. #5
    Join Date
    Feb 2009
    Location
    Spain
    Posts
    25,547

    Default Re: 12.2 checksum errors durinig installation?

    On 2013-01-01 18:16, Stingray tm wrote:

    > What is the possible reason for this? I thought downloads were supposed
    > to be reliable these days?


    No, they never are, unless you use a protocol that ensures correct
    download, as for example, metalinks or torrent.

    > So am i in danger of somebody corrupting my system? Or is it just a
    > usual irregularity, that happens from time to time?


    Just a chance error, either in the download or in the burning of the media.

    --
    Cheers / Saludos,

    Carlos E. R.
    (from 11.4, with Evergreen, x86_64 "Celadon" (Minas Tirith))

  6. #6

    Default Re: 12.2 checksum errors durinig installation?

    Thanks

    For a second i was worried about some kind of virus, that could infect my pc just by booting the corrupt DVD. (I just had an infection, so i am a bit jumpy about this). But in this case, i just will redownload the file as told.

    Thanks, again

  7. #7
    dd NNTP User

    Default Re: 12.2 checksum errors durinig installation?

    On 01/01/2013 07:06 PM, Stingray tm wrote:

    > For a second i was worried about some kind of virus, that could infect
    > my pc just by booting the corrupt DVD. (I just had an infection, so i am
    > a bit jumpy about this).


    relax.
    there is no virus which attacks Linux..
    i do not have, and have never had an anti-virus program..
    there are no anti-virus programs to guard against Linux viruses.

    --
    dd http://tinyurl.com/DD-Caveat

  8. #8
    josephkk NNTP User

    Default Re: 12.2 checksum errors durinig installation?

    On Tue, 01 Jan 2013 19:17:18 GMT, "dd" <dd@home.dk> wrote:

    >On 01/01/2013 07:06 PM, Stingray tm wrote:
    >
    >> For a second i was worried about some kind of virus, that could infect
    >> my pc just by booting the corrupt DVD. (I just had an infection, so i am
    >> a bit jumpy about this).

    >
    >relax.
    >there is no virus which attacks Linux..
    >i do not have, and have never had an anti-virus program..
    >there are no anti-virus programs to guard against Linux viruses.


    That is not exactly correct. There about some hundreds of them. Many so
    old that they are no longer effective. Quite unlike the MS world where
    there are many millions of them, way too many still potent.

    ?-)

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