External HD Not Recognize

[junrie]

Hello, I have a Windows 7 Professional x64.. My Problem is that my external hard disk mass storage cannot be detected,i cant see the mass storage of my external drive in device management and disk management. Instead there is one that is detected "ASMT 2105 USB Device" yet it is 0 bytes and i cant access, it says insert disk..yet i connected the external drive on my computer. my external drive is Toshiba 3.0

Hoping for your replies and learn what to do, because i have so many important files in my external hard drive. thank you!!

 

[ThrashZone]

Hi and welcome to SevenForums,
Shut down your machine = Power off.
Disconnect the external,
Power up and after login reconnect it into a different usb port,
Make sure the external if it has a power switch it is on as well,
Cheers.

 

[junrie]

Thank you for your reply, ive had done that... and i also connected it to a different ports, my laptop has only 2 ports, but it still the same... some times, it detect the mass storage but after a few minutes, it removes automatically and then cannot detect again..

 

[ThrashZone]

Hi,
Post the exact model of the external device,
Might be Eset blocking the device is Eset new to the machine ?

 

[comptech]

Did you use it in any other computer?..

 

[junrie]

I dont yet try it to the other computer...my external hard drive is toshiba 500gb and a 3.0.... If ever it will run on other computers, i want to know or learn how to manage it on my own laptop...

I appreciate all your reply thank you very much!

 

[comptech]

right click computer-->manage-->disk management-->right click removable drive-->change the drive letter

 

[junrie]

Thank You so much for the reply.... I take it a rest...then just put it now and it read my external hard disk drive... but i am monitoring it now if it will be automatically removed and cant access again... Thank you so much for those who replied at me.. thank you very much

Even you dont know me, u still help me.. so thank you very much!

 

[junrie]

Aw!!! I Can see it.. yet its all Empty! Tsk tsk XD

F: Drive is my external Hard drive

 

[junrie]

Guess Changing the Drive Letter Worked! First i make the time to change its drive letter before it will removed automatically. And i can access and can safety eject my USB external hard drive...

Thank You so much for your help once again!..

 

[junrie]

Thought Changing the Drive Letter worked.. but its not...My external hard drive is removed automatically in the middle of copying my files... Why is that so.... then after it automatically removed, it says "Windows cannot recognize" then it tells me to format my external drive....I ejected it then connect it again.. then cant access again my external hard drive..

Thank you for your help!

 

[kpchg4]

Hi Junrie,

I got the same problem too. Did you get the solution finally?

 

[arleetel]

Hello,

I have the same problem, ASMT2105 USB device, not showing, USB 3.
The only way I get it to show is to uninstall the drivers and restart the computer, it works for a couple of days and then......
again same problem.

I hope someone out there has a better solution, a permanent one.
I start to think it's a Windows 7 problem, maybe I'm wrong !

 

[Samson888]

Hiya I have a similar problem.
I have a Sandisk SDSA4DH-064G, its a MSata internal drive. I've just bought a USB3 to Msata adapter.
When I first plugged it into my friends computer it started loading the driver but it crashed.
I can find the drive in Device Manager. But I can't open it or load any details of he drive.
But I can't find it in Disk Management.

Anyone have a clue?

 

[m4800master]

I believe I have the understanding to the reason of this fault

I noticed people mention ASMT 2105 USB Device

I have this. in my device manager windows 10 ent

The fault I am having is same, but I have narrowed the fault down to how and when it occurs

1st let me explain, my ASMT 2105 relates to a external usb3.0 to m-sata enclosure, I purchased this from ebay, as I have a m4800 laptop and it has a 7mm SSD 256gb as its main hard drive, and a M-card mini card 256gb lite-on ssd in the msata slot as a secondary hard drive...

The system is NOT configured for raid... but I wanted to remove the msata ssd and use the slot for WIGIG, but in the mean time I wanted to take the msata ssd and put it into the enclosure, and use it like a removable hard drive...

So here comes the problem,

liek many people notice, it working fine, then a fault... I noticed when the fault would occur.... anytime I WRITE files to the ASMT 2105 (msata 256gb ssd) it would show the progress of about 199MB/s for maximum 3 seconds and then stall, and the light would blink on the enclosure box.

No matter what from that moment, its no responcsive, and hangs the system, only option is unplug usb lead... which frees up the system, but when i re-insert usb lead, it is still flashing, and the windows 10 does not see it, and neither does disk manager or device manager, it does however make a noise that usb attached...

nothing fixes this, not even driver removed etc, not even restart pc, not even shut down, or combination unplugging and replugging etc


the only way I fix it, is by removing the msata ssd out of the ASMT 2105 enclosure, and putting it back inside the laptop Mcard slot, and reboot TWICE... then it shows up in the system as a SSD working again, from this point, I can remove it and plug back inside the enclosure etc

I tried many scenario, and it will read all day long, but as soon as it is written to more than 3 seconds it hangs and needs the above paragraph in order to get it working again.

 

[mrjimphelps]

Does your external hard drive have its own power supply? If it is operating only on USB power, that could be the cause of the problems. USB might not be providing sufficient power.

As ThrashZone stated above:

Make sure the external if it has a power switch it is on as well.

If it does not have its own power supply, then unplug all other USB devices except for the keyboard and mouse. Doing this will make more power available to the drive. See if that fixes it.

 

[m4800master]

well nope, its a light weight no longer that 7cm x 10mm Msata SSD

so it pulls barely any power, unlike a external hard drive with spinning platters etc

 

[flbjuniorx]

I noticed people mention ASMT 2105 USB Devicet

I have problems with this external case ASMT2105 with huge disks (4TB or more). I thought it was a hard drive issue, but when changed the case, the disk was recognized.

Still trying to find more information about ASMT2105...