[GRLUG] Mounting USB flash drive (Centos 6.3)

[Dave Chiodo]

Next time mount it *before* you try to write to it. (and be sure to
umount it before you remove it, for removable devices, to allow
everything to by sync'ed)

Yes, linux doesnt use "drive letters".. a filesystem on another
drive/partition/device (wether internal or removable) is grafted on to
the existing filesystem at a specific directory path. (Anything
previously within or below that path is hidden for as long as it is
mounted - generally you only want to mount filesystems on otherwise
*empty* directories.

Some GUI/desktop environments take care of this for removable media
automatically for you, if you let them.


On Tue, Feb 5, 2013 at 11:28 PM, Steve @ HCS
<steveg at branchadventures.org> wrote:
> Yes, that makes a lot of sense.   An interesting thing i did accidentally
> was to write a file to the OS folder before i mounted it.   After mounting,
> it never got sent to the actual drive after i then mounted it.    Kind of in
> limbo land.
> Lessons learned.   Thanks John
>
>
> On 2/5/2013 11:16 PM, John Wesorick wrote:
>
> Linux uses a single filesystem hierarchy. Everything is under / (even
> removable or network drives). When you created the folder and mounted the
> flash drive to /mnt/usbflash you were telling the OS that your flash drive
> can be found at /mnt/usbflash. Without mounting it, Linux can't see it,
> since it isn't in the file system hierarchy. Does that make sense?
>
> On Feb 5, 2013 11:08 PM, "Steve @ HCS" <steveg at branchadventures.org> wrote:
>>
>> Thanks John,
>>
>> Is the folder on the OS,  a hardware abstraction queue?
>>
>> On 2/5/2013 10:53 PM, John Wesorick wrote:
>>
>> I don't understand. You mounted your flash drive to a folder on your OS
>> and wrote to it. That's how it works.
>>
>> On Feb 5, 2013 10:39 PM, "Steve @ HCS" <steveg at branchadventures.org>
>> wrote:
>>>
>>> While i'm out tonight wearing my ignorance on my shoulder,  i was
>>> wondering if someone could provide an explanation of how the below works.
>>>
>>> On a VMware server running Centos, i needed to copy some sql data onto a
>>> flashdrive.  Once the USB host and device are attached to the VM,
>>> in order to be able to write to the flashdrive i:
>>>
>>> fdisk -l    and got the "sdc3" that i needed
>>>
>>> But i just don't understand enough about the OS to know how the below
>>> mounting works.  Why writing to the "usbflash" magically shows up on the
>>> flashdrive is a mystery to my brain.
>>>
>>> mkdir /mnt/usbflash
>>> cp tmp/asdf.sql to the usbflash directory i just created
>>> mount /dev/sdc3 /mnt/usbflash
>>>
>>> P.S. Above is from memory of earlier in the day so hopefully is accurate
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>>
>>
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>> --
>>
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>>
>> Steve Grody - Owner
>>
>> 616-502-2454
>>
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>
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>
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>
> Steve Grody - Owner
>
> 616-502-2454
>
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