Message about disk eject, but disk is mounted

On my MacBook Pro, with two external hard drives mounted, I get this message about 3 times a day:
“The disk was not ejected properly.”
Most often, this occurs when I am not using the computer, but it is on. When I see the message, I check the Finder and see that both my disks are mounted and available. I have then looked at Console, to see if there is anything understandable in he console log, but I don't really know what to look for, and haven't seen things that look related to this problem.
I cannot even identify which of the two drives is involved. I plan to unmount one of them and see if the symtoms continue, and if not, reverse the mounting.
In Energy Saver prefs, I have Put the hard disks to sleep when possible unchecked.
Anyone solved this ??

I'm getting the same error. I tried to purchase a movie and iTunes told me I didn't have enough store credits, even though I was attempting to use my credit card. I finally was able to click the 'buy now'; but now it won't download the movies, giving me the same error and a message window which states:
There was a problem downloading "x movie".
The disk you are attempting to use is full.

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"disk not ejected properly" but is still mounted on desktop?

Hi,
I get a "The disk was not ejected properly" message, yet if I go to the Finder's desktop the drive is still mounted and accessible and read/write works fine.
I've witnessed it happen once while viewing the desktop. The drive disappears momentarily for about 1.5 - 2 seconds, then shows up again. So It DOES eject, but it instantly re-mounts, and I mean in under 2 seconds and I've neder experienced a drive intentioanlly unmount/remount this fast in my life. It does happen more often when waking from sleep, but not only in that instance.
Been having this bug since OS X Lion and on to the current version of Marveicks. I am posting this under Mavericks because it's not hardware specific to anything other than USB and LaCie. I am experiencing it on multiple machines, different models, with different external LaCie drives of differing types, with different USB cables. This does not only happen when waking from sleep (as most threads seem to indicate), it sometimes happens for no reason.
The common factors:
All the external drives are LaCie drives (though vastly different models).
Both affected Macs are 2012+ models with Thunderbolt interphases and USB 3 ports (am using USB ports for USB drives, no Thunderbolt adaptors).
I could suspect LaCie, but since it's new since Lion... well you get the picture. Something leads me to suspect a bug in OS X USB protocol, possibly on software, maybe even in firmware. Might be linked to energy saving. I have "sleep drives when possible" enabled, and though it might help to turn that off (I haven't tested yet) I just don't feel I should need to, I want unused drives to spin down and save energy.

Hello there The Heftster,
It sounds like your external drives are periodically disconnecting on their own from the computer causing the prompt saying that the drive was not ejected properly. I would start by resetting the PRAM on your computer with this article:
OS X Mavericks: Reset your computer’s PRAM
http://support.apple.com/kb/ph14222
Shut down your Mac.
Locate the following keys on the keyboard: Option, Command (⌘), P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on your Mac.
Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the gray screen appears.Continue holding the keys down until your Mac restarts, and you hear the startup sound for the second time.
Release the keys.
Resetting PRAM may change some system settings and preferences. Use System Preferences to restore your settings.
As well as the SMC on your computer:
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/ht3964
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
Thank you for using Apple Support Communities.
Take care,
Sterling

Why do I keep getting the message "The disk was not ejected properly." (There is no disk in the iMac)!

For about the last two to three months, every time I wake up my iMac from sleeping, I always get the message "The disk was not ejected properly."
There is no disk in my iMac!
This is no big problem to me, as all I do is hit the "enter" key, and it disappears until the next time I wake it from a sleep.
But, WHY is this happening?

Hi WZZZ. I don't know what to look for when I opened per your instructions, but here's the images:
Two more snaps to come:

Error message: The disk was not ejected properly.

A client has this message popping up periodically, even though no mounted disks have been unplugged or switched off. All mounted disks continue to be visible and functioning. It goes away when he clicks OK, but it keeps coming back, for no apparent reason. Sometimes it happens every half hour or so, sometimes not for days at a time. Can't figure out what's causing it.
He's using a Mac Pro 5,1, with three Western Digital external drives attached. Running the most current version of Mountain Lion.
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Hi Dominic,
If this is still not mounting, it may be worth trying a PRAM reset...
http://support.apple.com/kb/ht1379
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I installed google chrome and added it to my applications folder and it works but my desktop still has the icon of the chrome volume/disk and when i right click it gives an option to eject but it will not delete how can I get rid of it?

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Barney-15E:
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Popping error message "The disk was not ejected properly"

Although I am rejecting my external hard disks, still when I unplug them the error message "The disk was not ejected properly" pops up.
Worth to note that disks are not in sleep.
My McPro is running OS X Lion.

I've been following this issue for a long time on one of the other Apple forum discussions. A suggestion was made to install an app called Jettison (by St. Clair Software). Since doing this two days ago, I have not seen the infamous "improper ejection" error message. Jettison seems to do, automatically without any effort on my part, exactly what the developer says: "Jettison eliminates the hassle of manually ejecting external drives before you put your MacBook to sleep and remounting them when it wakes."
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Message about disk eject, but disk is mounted

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