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Windows 7: Trouble with removable drive disappearing

14 Oct 2010   #1
mpcrsc562

Windows 7 Ultimate x64
 
 
Trouble with removable drive disappearing

Good day all!

On my new toy, my Aspire One 532h, I have a problem with an SD card disappearing from Windows. Let me explain:

As I stated, this is an Aspire One 532h, Intel Atom N450, 1 GB DDR2-667 memory, 250 GB HDD, Windows 7 Starter. It has an integrated card reader that is run by ENE Card Reader drivers (Service & Support). Because my specific model cannot upgrade past 1 GB system memory (sucks!), I have been using ReadyBoost to help performance. I have found that formatting SD cards to exFAT helps Windows to use these cards for ReadyBoost. At one time, I used a 4 GB SD card and an 8 GB flash drive for ReadyBoost with no problems -- except for the flash drive protruding from the pc. I found a 16 GB SDHC Class 6 card for a good deal. I formatted it to exFAT, inserted it and selected to use it for ReadyBoost. All was well at first. About 3 minutes later, I hear the Windows Device Disconnect sound. I check Explorer and the card/drive is gone. I remove the card, wait for a second, then reinsert the card. It is recognized and again about 3 minutes later, the card/drive disappears. I tried an 8 GB SDHC card (which I am using right now) and have had absolutely no problems.

My question for those who have any Aspire One experience or netbook experience in general: With this ENE card reader, is there a size limitation on SD/MS/xD/MMC cards that can be used? A sixteen gigabyte card won't work and I have no problems with any size below that. Each card--from the 16 GB down to the 4 GB--has been formatted as exFAT. Maybe I'm not phrasing my search right, but I have not been able to find any info on this.


My System SpecsSystem Spec
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14 Oct 2010   #2
LiquidSnak

W7 Professional x64
 
 

Have you tried multiple 16GB cards? And yes, there are size limitations on cards sometimes, but usually in hardware such as phones and cameras.
My System SpecsSystem Spec
14 Oct 2010   #3
Bill2

Windows 7 x64 pro/ Windows 7 x86 Pro/ XP SP3 x86
 
 

Does this card work as readyboost in the first few minutes that it is seen by the computer? It may not be readyboost compatible. Check in the card's properties whether Readyboost tab shows up.

Also, for readyboost to work the card must meet a minimum speed criterion. As per wiki the device must be capable of 2.5 MB/s read speeds for 4 KB random reads spread uniformly across the entire device and 1.75 MB/s write speeds for 512 KB random writes spread uniformly across the device.

Another issue could the internal card reader. Check on another machine or an external card reader.
My System SpecsSystem Spec
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14 Oct 2010   #4
mpcrsc562

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by Bill2 View Post
Does this card work as readyboost in the first few minutes that it is seen by the computer? It may not be readyboost compatible. Check in the card's properties whether Readyboost tab shows up.

Also, for readyboost to work the card must meet a minimum speed criterion. As per wiki the device must be capable of 2.5 MB/s read speeds for 4 KB random reads spread uniformly across the entire device and 1.75 MB/s write speeds for 512 KB random writes spread uniformly across the device.

Another issue could the internal card reader. Check on another machine or an external card reader.
Thanks for the replies. Yes, the ReadyBoost tab shows up. I am able to enable ReadyBoost and then the card/drive goes poof!
My System SpecsSystem Spec
14 Oct 2010   #5
karlsnooks

MS Windows 7 Ultimate SP1 64-bit
 
 

ReadyBoost utility is questionable. If you would like to improve the performance, install the max amount of ram that toy will take. 1 GB is minimal requirement, but 2 GB is a practical minimum.
My System SpecsSystem Spec
14 Oct 2010   #6
mpcrsc562

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by karlsnooks View Post
ReadyBoost utility is questionable. If you would like to improve the performance, install the max amount of ram that toy will take. 1 GB is minimal requirement, but 2 GB is a practical minimum.
Thanks, but not applicable. Can't go past 1 GB. (http://support.acer.com/acerpanam/ne...O532hsp2.shtml)

As far as ReadyBoost is concerned on my system, I speeds up performance greatly. I just wanted to use a larger sized SD card. And if my post wasn't clear, and I apologize if I was not, this happens only with SD cards, not with flash drives.
My System SpecsSystem Spec
14 Oct 2010   #7
karlsnooks

MS Windows 7 Ultimate SP1 64-bit
 
 

Pity. I do not have any solution. I would try formatting as NTFS.
My System SpecsSystem Spec
14 Oct 2010   #8
LiquidSnak

W7 Professional x64
 
 

Quote   Quote: Originally Posted by LiquidSnak View Post
Have you tried multiple 16GB cards?
^^^
My System SpecsSystem Spec
15 Oct 2010   #9
mpcrsc562

Windows 7 Ultimate x64
 
 

No, unfortunately, I don't have any other 16 GB cards to use and it is monetarily feasible for me to go out and buy extra cards just to test this. I can get along with an 8 GB cache as I'm doing now.

Thanks all for you're input.
My System SpecsSystem Spec
15 Oct 2010   #10
karlsnooks

MS Windows 7 Ultimate SP1 64-bit
 
 

Did you format as NTFS? If not, then please do.
My System SpecsSystem Spec
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