Memory card keeps ejecting itself

Dear Apple experts,
I have had an iMac with OS x 10.6.7 for a year now and for the last 2 weeks, whenever I connect a memory stick pro duo via a memory card reader, the card keeps ejecting itself every few seconds and an error message comes up "disk drive not ejected properly.
I have tried changing the cable, the memory card and the reader but the problem persists.
Please could you advise?
Many thanks.

try reformatting the card using your camera
and restart your computer
LN
PS - Note that we are not Apple experts - we are Mac users just like yourself who use iPhoto
Message was edited by: LarryHN

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Device removal error..... The card reader ejects itself

Hello, I'm new to macs and purchased a Mac Mini a week ago. Things were going well until I needed to move pictures from a digital camera to my mac.
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If I can't get any prompt answer here, I'm going to call the Genius bar tomorrow morning and ask about the problem. <Edited by Moderator>

More often than not, when a card reader or other similar device disconnects from the USB bus because it is drawing too much power. In a card reader, that would not unusually be triggered not by the card reader itself, but by the insertion of a card causing it to read the content and mount the volume on the Mac's desktop. Part of the problem is that while everything is invariably quoted as USB compatible, many such devices don't entirely comply with the USB standard, resulting in conflicts or load demands which may be borderline, or worse.
You may be able to get more reliable performance from your reader by disconnecting other USB devices when you are trying to use it, or by using it with a powered USB hub. Occasionally, borderline problems can be temporarily resolved by connecting the device to a different port, if necessary switching devices around. Alternatively, it may be that in an attempt to produce a device with the greatest flexibility in terms of media compatibility, they have compromised on components.
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My mac mini is set up with two sata disks installed, one is a 128 ssd and the other a 1tb hdd. Since installing mountain lion, the hdd keeps ejecting itself, and i get a message saying - this hard disk was not properly ejected. then i wont find the disk in finder, or disk utility!. I then have to remove the hdd from the mac mini and plug it into a usb caddy, which finds it no problem, and then when i put it back in the mac mini, it works again!! so the disk is not faulty i dont think. It then works for a period as random as a few hours, to a few weeks and then i will randomly get the "this disk was not ejected properly" message and it has again dissapeared. I use the mac mini as a media centre and it isnt really being pushed hard when the failure happens.
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Hello, Sorry for the late reply.
When i open console after the ejection i get the message:
01/11/2012 22:32:42.000 kernel[0]: Failed to issue COM RESET successfully after 3 attempts. Failing...
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If i do a full shutdown and restart, it finds the disk again no problems, but if i simply choose to restart from the menu, it does not find the disk again.
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Drive information:
SAMSUNG HN-M101MBB:
Capacity:          1 TB (1,000,204,886,016 bytes)
Model:          SAMSUNG HN-M101MBB
Revision:          2AR10001
Serial Number:          S2R8J90B815515
Native Command Queuing:          Yes
Queue Depth:          32
Removable Media:          No
Detachable Drive:          No
BSD Name:          disk1
Rotational Rate:          5400
Medium Type:          Rotational
Bay Name:          Lower
Partition Map Type:          GPT (GUID Partition Table)
S.M.A.R.T. status:          Verified
Volumes:
disk1s1:
Capacity:          209.7 MB (209,715,200 bytes)
BSD Name:          disk1s1
Content:          EFI
living room:
Capacity:          999.86 GB (999,860,912,128 bytes)
Available:          648.66 GB (648,662,093,824 bytes)
Writable:          Yes
File System:          Journaled HFS+
BSD Name:          disk1s2
Mount Point:          /Volumes/living room
Content:          Apple_HFS
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There is a recall on the 15"
Apple Recall
https://www.apple.com/support/macbookpro-videoissues
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How full? how about just image and erase and restore instead? CCC
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Memory card keeps ejecting itself

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