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Author Topic: Camera memory cards  (Read 5871 times)

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RankenTech



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    Re: Camera memory cards
    « Reply #15 on: October 09, 2007, 11:42:32 AM »

    [/quote]

    I was wondering about static....

    Are the cards designed somehow to be resistant to ESD with handling?
    Can you just drop one in your pocket and go?     Or do you have to be careful and hold it by the edges?


    [/quote]

    I'll go back to one of my previous posts...I've sent flash cards and drives through washers and dryers, and every single time the media has come out perfect. and just think about how much static electricity builds up in a normal dryer. If the media can survive that, I think it would be safe to handle and stick in your pocket.
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    WillyW

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    Re: Camera memory cards
    « Reply #16 on: October 09, 2007, 11:49:03 AM »

    ... and just think about how much static electricity builds up in a normal dryer. If the media can survive that, I think it would be safe to handle and stick in your pocket.

    Good point.  Obviously, I hadn't thought of it that way.   

    Thanks

    .



    contrex

    • Guest
    Re: Camera memory cards
    « Reply #17 on: October 09, 2007, 11:50:02 AM »
    Then I asked an additional question.
    If you happen to know,  I'd still like to know.

    The slide show will appear on the DVD as a series of .VOB files, just like an ordinary DVD. They will be rather large and impractical to send via email I think.

    Quote
    Are the cards designed somehow to be resistant to ESD with handling?
    Can you just drop one in your pocket and go?     Or do you have to be careful and hold it by the edges?

    They should come with a little plastic case. They should be kept in that when not in use.



    Compact Flash cards have all the pins enclosed so it is rather hard to make contact with the circuitry but I have noticed that SD cards have exposed contacts. One is advised not to touch the exposed contacts, both to avoid tarnishing from skin secretions and possible ESD.

    I must mention that as I live in a moistly temperate zone (Great Britain) and I don't wear nylon clothes and as I have a wool carpet, I have never really experienced any ESD troubles, and I don't know anyone who has. I understand it is more of a problem in other places.

    Quote
    The product to be tested is charged as highly as possible under most critical conditions, usually in dry climate at 23 °C at a
    relative humidity of less than 30 %
    (German static discharge test description)

    Those conditions are pretty d**n unusual around these parts!

    Compact Flash


    Secure Digital


    Flash memory care tips from Kingston, one of the biggest makers
    Quote
    # Replace or recharge batteries in devices after getting a low-battery warning

    Battery discharge is one of the most common problems causing the loss of pictures or other data on Flash storage devices. If a battery dies in the middle of a write operation to the Flash storage device, then not only can the file being written become corrupted, but the entire device may be damaged as well. For example, if the File Allocation Table (FAT) directory file update is incomplete and the FAT file is corrupted, some or all files on the Flash storage device may no longer be accessible.

    However, it may be possible to repair the Flash storage device using commercially available disk recovery software. Even with these recovery programs, some data or files on the Flash storage device may still be lost, but the rest may be recoverable.

    To avoid these problems, carry a spare battery if possible or stop using a device when battery power gets very low.

    # Properly remove your Flash storage device from the host device

    It is important to wait until all operations are completed before removing a Flash storage device from a digital camera or other host device. If the Flash storage device is removed during a write operation, for example, the Flash storage device may be corrupted and data loss may occur.

    Most digital cameras will show a blinking light during Flash write operations, so it is important to wait until all operations are completed.

    On PCs, it is important to stop a DataTraveler's USB connection through Windows (In Windows XP, use the "Safely Remove Hardware" icon in the system tray). For DataTraveler Elite drives, you can use MyTraveler's Eject button. Computers often "cache" data into memory and may delay the write to USB Flash drives. As a rule of thumb, wait a minimum of 2 minutes after you finish writing data to a DataTraveler drive.

    # Properly store Flash cards into their plastic cases and close cap on DataTraveler drives

    Flash storage devices, while quite reliable, can be damaged when dropped on hard surfaces. When not in use, storing Flash storage cards in their clear plastic cases is recommended. DataTraveler drives should be stored with their caps on.

    In addition, static electricity can also damage Flash storage devices. For example, on dry days, a person can generate enough static electricity to cause a spark while touching a door knob or other metal objects (this is called electro-static discharge or ESD).

    Kingston Flash cards and DataTraveler drives are designed to resist high levels of electro-static discharge; however, extreme levels of ESD may cause damage.

    # Do not force Flash storage devices into connectors

    Flash card or USB Flash drive connectors are unidirectional. This means that the Flash storage device must be inserted in one direction only; if you cannot insert the device, do not force it in to prevent damage to the Flash storage device or the socket! For more information on proper insertion of Flash cards or USB Flash drives, consult your host device's user manual.


    # Pack Flash storage devices into carry-on luggage if possible

    Tens of millions of Flash storage devices are in use worldwide, and there have been no verifiable reports of Flash storage damage due to airport X-ray scanners.

    A 2004 study by the International Imaging Industry Association (I3A) verified that today's airport X-ray machines do not appear to be a risk to flash memory cards.1

    As a precaution, Kingston recommends that Flash cards and DataTraveler drives be treated just like unprocessed film and stored in carry-on luggage, as the passenger screening radiation levels are much lower than those used by newer luggage scanning machines.

    # Avoid U.S. Postal Service radiation scanning of mailed packages

    According to the CompactFlash Association, x-ray scanners at airports will not damage CompactFlash cards but radiation scanning by the U.S. Postal Service may damage them.2 Because of this warning by the CompactFlash Association regarding mail irradiation by the U.S. Postal Service, it may be preferable to use a commercial service such as FedEx, UPS, or other private carrier as an alternative to mailing Flash storage devices by U.S. mail.

    # Always make backups of your data

    Flash storage devices are not infallible and can have their data damaged due to factors mentioned above. It is important to backup important information on multiple media or even print them on paper for long-term storage. Do not store important data solely on Flash storage devices.






    WillyW

      Topic Starter


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    Re: Camera memory cards
    « Reply #18 on: October 09, 2007, 12:13:55 PM »

    The slide show will appear on the DVD as a series of .VOB files, just like an ordinary DVD.

    Not having a DVD burner, I am not familiar with ordinary DVDs.
    But,  with that info,  I can look around for more info.   :)     

    Quote
    They will be rather large and impractical to send via email I think.

    I assume there is some sort of software out there to convert a picture so stored, to a .jpg?        If and when the time comes,  I'll ask again then.


    Quote
    Quote
    Are the cards designed somehow to be resistant to ESD with handling?
    Can you just drop one in your pocket and go?     Or do you have to be careful and hold it by the edges?

    They should come with a little plastic case. They should be kept in that when not in use.



    Compact Flash cards have all the pins enclosed so it is rather hard to make contact with the circuitry but I have noticed that SD cards have exposed contacts.

    Never had my hands on an SD card.   But I thought they looked like the contacts were exposed -  similar to the look of regular computer ram cards.

    Quote
    One is advised not to touch the exposed contacts, both to avoid tarnishing from skin secretions and possible ESD.

    Which seems to indicate that running them through the clothes dryer and getting them out without damage/loss is a miracle!   

    Quote
    I must mention that as I live in a moistly temperate zone (Great Britain) and I don't wear nylon clothes and as I have a wool carpet, I have never really experienced any ESD troubles, and I don't know anyone who has. I understand it is more of a problem in other places.

    Fair enough.   

    Quote

    ... much snipped for brevity....


    That's a lot of info!
    Thanks for your time in providing it.    I have not had time to digest it yet -  I'll visit this thread on and off as time permits though.

    Thanks!   That applies to all that have commented/ are about to comment.


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