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Thread: External Hard Drive in car????

  1. #1
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    External Hard Drive in car????

    Hi

    This has probably been asked and answered before, but there are so many threads I can not find the answer.

    The question is simple, I will be getting a USB enabled head unit soon and I want to connect a hard drive.

    I have an external 3.5" hard drive going spare, it is run off of the mains through a transformer that converts the input to 12v DC 1 AMP.

    Can I just take a 12v feed off of my car with an inline fuse and feed it into the hard drive so I can connect it to the head unit?

    Many Thanks.

  2. #2
    Unregistered User ODYSSEY's Avatar
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    No, not directly. Car voltage is unregulated.

    http://www.mp3car.com/wiki/index.php/Power
    ODYSSEY

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  3. #3
    Neither darque nor pervert DarquePervert's Avatar
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    You probably won't be able to use the HDD with the headunit anyway. Most headunits w/ USB won't access a USB HDD.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  4. #4
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    Thanks for the quick replies.

    I have a regulated DC/DC so I can put it through this, but it is a shame that most won't access a hard drive.

    If the hard drive has its own power supply, and is formatted fat 32 the same as a flash card, then why can't it be accessed through USB like a flash card?

    Thanks

  5. #5
    Neither darque nor pervert DarquePervert's Avatar
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    I'm not certain, but I think it's a limitation in the way the headunits are made.
    There is one that I know of that has an aux module that allows connection to a USB HDD. I think it's an Alpine model, but I could very well be wrong. It was posted here on the mp3car forums. Search around and I'm sure you'll find it.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  6. #6
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    I didn't see where you specified what head unit you were installing. The new Kenwood units can handle up to 15,000 songs through the USB port. Not sure why that limitation, but it's what they claim. I don't know if the link will show up, but if not search for "usb" and "Kenwood" on the diymobileaudio.com forum site for more info. here's the tread link: MP3 Mass Storage - Diy Mobile Audio

  7. #7
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    Thanks for the reply.

    I have not specified a unit yet as I am not sure which ones will fully support a hard drive.

    I am getting conflicting informatiom from different sources and the manufacturers do not respond to emails.

    My local so called specialist stores have not got a clue, they are all saying different things and are just trying to fob me off with what they currently have in stock.

  8. #8
    Variable Bitrate john05srt4's Avatar
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    Yes dont power it that way..but if u have an extension cord plug it in the try it..it cant hurt to try to see if it will read the HDD.
    But i dont think it will work like a flash drive would.
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  9. #9
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    Firmware driver

    It is possible that head units with USB ports have a firmware device driver (like a PC device driver but on a chip). No doubt this chip is set to recognize flash drive drivers and not HDD drivers.

    Maybe HDD drivers are not universal and vary from maker to maker. While a flash drive driver is universal to work across platforms and devices. Or even independent of operating systems.

    What you need is a $200 16Gb flash drive from flash-memory-store.com! If your girlfriend wants to play her "adult contemporary" music she can go buy her own 16Gb flash drive.

  10. #10
    Newbie mp3gtr's Avatar
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    There are quite a few head units that support USB HD now. I was originally going to replace mine with a Kenwood KDC-W6534U 149 from amazon. I sure you can get it cheaper somewhere!

    http://www.amazon.co.uk/Kenwood-KDC-.../dp/B000FU8LP6

    This says it supports USB HD.

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