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Thread: Auto power off

  1. #1
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    Question Auto power off

    my system is amost done but I still can't figure out what I should do with auto power off the computer when the car is turned off.
    Where can I get the 'shutdown controller' like one from mp3ondemand.com
    Please help me.

  2. #2
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    http://www.mp3car.com/usersites/Maveric/ M.A.V.I.C. System
    Asus MB, PII 266, 192 MB Ram, 6.8" LCD, 6 Disk CD-ROM, 21 Gig HD, All-in-Wonder Video w/ TV Tuner, Irman, Windows ME, Winamp, Cobra III -- All in a custom acrylic case.

    http://www.mp3car.com/usersites/listings/ MP3car Listings - Please add to it! :)

  3. #3
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    WOW!!
    Thank you SOOOOOOOOOOO much Maveric!

  4. #4
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    NP! Glad to help!
    http://www.mp3car.com/usersites/Maveric/ M.A.V.I.C. System
    Asus MB, PII 266, 192 MB Ram, 6.8" LCD, 6 Disk CD-ROM, 21 Gig HD, All-in-Wonder Video w/ TV Tuner, Irman, Windows ME, Winamp, Cobra III -- All in a custom acrylic case.

    http://www.mp3car.com/usersites/listings/ MP3car Listings - Please add to it! :)

  5. #5
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    Question

    Hey, I was wondering if it really mattered about the power off thing, at least under Win98SE?
    I have a 400mhz Celeron running off a 140w inverter hooked to a switched power supply, and when I turn off the car, the puter goes with it. I've disabled ScanDisk, so it just boots up fine. In the case where the machine is just a Windows shell running Winamp, does it really make any difference to shut it down gracefully? Just wondering...

  6. #6
    Oms
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    Based on my personal experience with Windows, you should be fine 99% of the time, and totally screwed when your 1% comes around...

    Also, it's nice to have a delayed power-off, like 10-15 minutes after you've stopped the car. Gives you time to fill up the tank, or dash into a store, etc.
    Custom Linux system on an '89 VW GTI 16V Edition One
    Jogdial volume control, Sony joystick, IR remote...
    Used to be the fastest Linux on the road, until all these NOS types came along...

  7. #7
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    Post

    All you need to do is buy a relay switch from radio shack. In my setup when the radio comes on the computer comes on.

  8. #8
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    Yes, it is VERY!! important to properly shutdown the computer. It might be ok to force shut off computer few times. But if you keep doing that it will cause several problems. such as :

    1. The opened programs might lose its settings and files.
    2. Windows system files will get corrupted(it will fix by scandisk, but if the computer keeps improperly shutdown, the files can not be fixed. you have to reinstall windows)
    3. the most importantly, if the hard drive keeps shut down improperly, it will have FAT files(the hard drive tracks will be corrupted) and the hard drive can not read files. If you have too many FAT files , the computer will not recognize the hard drive, if this thing happens, you are screwed
    Only low level format will fix this problem but if you have too many FAT files, you just have to throw the hard drive. The hard drive is just like a record player , the reading sensor will stop when power got shut off, when the power is back on, it will scratch the disc to move back to staring point.
    Even if you are using DOS , you need to shut down the hard drive properly . Old DOS program used to have shutdown.exe file but I am not sure about windows' DOS.

    These are why it's important to shut down properly.

  9. #9
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    Traxxis: Don't worry about it. I've done it more than two or three times a day for almost a year now. If you're using winamp as the shell and only reading from the hard drive, you can't corrupt anything. Things get corrupted when you're writing to the hard drive and it get's shut off.

    However, accord is right that winamp will not store settings if the power is just cut. I set mine the way I liked it, then closed winamp normally. Now winamp always boots up the way I like it, and none of the settings get changed

  10. #10
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    Originally posted by accord:
    <STRONG>3. the most importantly, if the hard drive keeps shut down improperly, it will have FAT files(the hard drive tracks will be corrupted) and the hard drive can not read files. If you have too many FAT files , the computer will not recognize the hard drive, if this thing happens, you are screwed
    Only low level format will fix this problem but if you have too many FAT files, you just have to throw the hard drive. The hard drive is just like a record player , the reading sensor will stop when power got shut off, when the power is back on, it will scratch the disc to move back to staring point.
    Even if you are using DOS , you need to shut down the hard drive properly . Old DOS program used to have shutdown.exe file but I am not sure about windows' DOS.
    </STRONG>
    I guess I should tell you this:

    FAT = File Allocation Table.

    Having a FAT is good. If you don't have one, then you're hard drive won't work, not the other way around. The hard drive uses the FAT to record where files are on the hard drive. If your FAT is corrupted, then your computer can't find the files on the hard drive.

    And that scratching the drive thing when it gets power back isn't true

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