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Mount/Unmount SD Card Procedure

Discussion in 'Android General Discussions' started by TxDoc, Dec 12, 2009.

  1. TxDoc
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    TxDoc Member

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    Did a search and did not find what I wanted to find.. Can someone explain the proper procedure for mounting/unmounting an SD card. And, explain when and why this is necessary.

    Thanks
  2. dezymond
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    dezymond RS Lead Premium Member

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    you need to mount an SD so the computer can read it

    you need to unmount it so the Droid can read it

    edit: oh yes the procedure
    1. plug in the droid to your computer
    2. pull down the manager (the bar on top with the time, sorry don't know the name, can't recall right now)
    3. hit "usb connected"
    4. window pops up on your computer showing you the contents of the SD card
    5. hit "turn off usb storage" when you're done
    6. disconnect usb cable (if you want) and then your Droid can read the SD card again
    Last edited: Dec 12, 2009
  3. freeloader
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    freeloader New Member

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    unless your talking about from the droid itself and not using your pc. in which case use sdrescan from the market. i use it when adding photos to my sdcard and wanting them to show up on the gallery without rebooting. (same goes for music)

    edit: or when adding .nomedia to a directory on my sd card.
  4. iiimegamaniii
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    iiimegamaniii New Member

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    +1 with what Dezy said.

    Coming from a strict Windows-background, apparently the DROID cannot view the file structure of the phone and PC like WinMobile / Windows can at the same time or synced. One can see one while the other can't. Took me a couple minutes to figure out this behavior.

    - Mega
  5. cgarnes
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    cgarnes New Member

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    Excellent comments! Well done!
  6. Backnblack
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    Backnblack Premium Member Premium Member

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    You do not need to unmount it...It does that when un-pluged from the USB cable...
  7. fmserc
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    fmserc New Member

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    you also need to mount if you're using a car audio cd player that has a usb connection... found that out with my kenwood deck.
  8. hookbill
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    hookbill Premium Member Premium Member

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    You do if you're using a mac. And why not unmount on the PC? Its what you're suppose to do.
  9. dezymond
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    dezymond RS Lead Premium Member

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    Yes, you don't necessarily NEED too, but I find it as kind of rough on the Droid. To me it's kind of like unplugging your computer without properly shutting it down, you don't know the consequences. If I know I can unmount it while it's still plugged in, and since it deals with transferring files, I feel that if I manually unmount it while it's still plugged in, I feel more assured my files won't go crazy or anything...just me i guess.
  10. fmserc
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    fmserc New Member

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    that's kinda like saying that you have to "eject" a thumb drive before pulling it out of the usb slot. i've been using the same 512kb thumb drive on over 600 different computers to install certificates for users at my old job. i've never once ejected. it's flash memory, it doesn't require to be saved etc... mac's don't autosave or keep a cache copy of whatever you're doing with your flash drive.

    mac - eject
    everything else - don't worry about it, just pull the plug!
  11. Martin030908
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    Martin030908 Super Moderator

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    discovered SDrescan today... great app! beats a power cycle :)
    Last edited: Dec 14, 2009
  12. kcs32787
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    kcs32787 New Member

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    thanks so much for SDrescan. i had been looking for something like that for a while now!
  13. TxDoc
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    TxDoc Member

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    Thanks very much for the replies. Very helpful. I thought I had post a "thanks", but apparently, I was wrong. So.. Thanks :)
  14. nunka
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    nunka New Member

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    With a flash drive that small---probably formatted as FAT16/32---you're right, mounting and unmounting doesn't matter. Many people format larger flash drives as NTFS, a filesystem that doesn't always complete its write operations as soon as you'd think it would. When you unplug an NTFS drive without unmounting, there may still be data cached in your memory that hasn't been properly written to the flash drive. You definitely risk corrupting the files on your flash drive if you don't unmount it.

    Of course, most people who format flash drives to NTFS are probably already aware of that, as well as the additional hardware stress caused by NTFS... at least, that's the hope.
    Last edited: Jan 2, 2010
  15. Laurence5905
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    Laurence5905 New Member

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    Hmmm.... That's weird, because I've never had any problems with needing a reboot to force the new data on the SD card to be scanned... When I transfer music or videos to the SD card, it's automatically scanned the first time I open up the Music app or the Gallery app... If I transfer a bunch of music (like the first time I put music on my Droid - 8GB's worth) it might actually take a few minutes to complete the scanning... But I've never been forced to reboot (or run a separate "scanning" app) to make it happen...
  16. Raeuber
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    Raeuber New Member

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    SDrescan is great to add media to the music player, but it doesn't fix listings after they have been renamed. You have to deleted them off the SD card, run a rescan then add them again and do another scan. What a nuisance. Uninstalled the app........
  17. cuskit
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    cuskit New Member

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    On my Mac, if I don't unmount (eject disc) first, and pull the plug - immediately a window pops up with "possible damaged data" etc. That's the least of it. Sometimes (yea - I live dangerously) when just unplugging it freezes up ALL usb devices (including my keyboard) because of an "improper unmount". I have a G5 Tower..

    So - I choose to follow protocol now and "eject" my disc first. After that I can safely unplug my USB cord. And give a sigh of relief! ;)

    Safe in Jersey - Cuskit
  18. jbs224
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    jbs224 New Member

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    I understand there is a difference of opinion as to whether you should "unmount" or simply pull the USB cable out of the Droid. What I was not clear on, is if you choose to unmount, how do you do it, from the PC or the Droid? If you select USB bar line on Droid and select turn off, it tells you to unmount, but I'm not clear how to do this. The manual says to use the "safely remove hardware feature." What the heck is this? Any clear guidance from all of you gurus would be great, as I am green as green gets. Thanks.
  19. cuskit
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    cuskit New Member

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    Mounting and unmounting your card is speaking of "ejecting" the image of the card from your computer before pulling the cable. Not sure about a PC, but on a Mac, once you choose (on the phone) to mount the disk - you will see it appear on your desktop computer. At that point you can copy, delete, load or unload photos, music, files, etc to and from the disk. When finished - you simply drag the icon to the trash (which effectively ejects the disk) or highlight it and choose eject from your toolbar. After that, you can safely remove the USB wire. I'm sure a PC has a similar procedure.

    Does this help?

    cuskit
  20. cchhiipp
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    cchhiipp New Member

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    To unmount when connected to the PC, on your Droid, drag down your notification menu and tap on "unmount". Then it's safe to unplug from the PC.
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