Question about Western Digital WD 250GB ELEMENTS 2.5 INCH EXTERNAL HDD USB 2.0 Hard Drive

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When i inserted an external drive to my pc, then i want to access to this external drive, it says the request could not be performed due to io device error.

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Io error means that the "Input/Output" is not working. This could be due of different reasons. Try the following:
1. try it on another computer if it works, it's something with your computer. Could be hardware (e.g. loose connected cable or driver) 2. try another USB cable, if it works, its due of the USB cable (or the cable has loose contact)

Posted on Mar 11, 2011

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Posted on Jan 02, 2017

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When I run the backup, the error message says; Check Your Backup The operation failed due to a device error encountered with either the source or the destination. If the source or destination volume is on...


An IO device is an input/output device your disc drive is a input device so either the disc is bad or corrupt or you disc drive is malfunctioning if the later is the problem try updating the device drivers for it.

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IO error


The message "The Request Could Not Be Performed Because of an I/O Device Error" appears when Windows is unable to read the data on a storage device.


If this error message appears when attempting to access the files on an input/output

(I/O or IO) device, such as an external hard drive, the file system on the drive could be damaged, the drive could be infected with a virus or the data connector inside the device enclosure could have come loose.


If troubleshooting the drive fails to fix the IO device error, formatting the drive might repair the device.

Connect the external hard drive to the computer.


Run an antivirus program.


Click the "Scan" tab or button, then click "Custom."

Uncheck all items in the list except for the drive letter assigned to the external drive.


Click "OK." Click "Scan" or "Scan Now" to run a virus scan on the hard drive.

Quarantine or remove any infections the virus scanner detects.


Click "Start." Input "cmd.exe" into the search field.

Press "Enter" to open Command Prompt. Input "chkdsk <drive>: /f /r" into Command Prompt.


Replace "<drive>" with the letter assigned to your external hard drive.

Press "Enter" to run CheckDisk on the drive.


CheckDisk will search for and repair detected errors or bad sectors.


Burn the files on the external hard drive to a set of DVDs or move the files to another drive, if possible.

If the IO device error reappears when attempting to move the files, disconnect the external hard drive from the computer.


Remove the power adapter from the drive.

Check the documentation included with the drive for instructions to take the drive apart.


If no instructions are available, contact the manufacturer for instructions or find out if disassembling the drive will void the drive's warranty.


Remove the screws securing the faceplate to the drive or from the edge of the enclosure. Insert the edge of a small, flathead screwdriver in between either side of the enclosure to wedge both sides apart.


Check the connections to the drive.

Confirm that the IDE or SATA interface is plugged into the back of the drive.


Reassemble the external hard drive, reconnect the power adapter and reconnect the drive to the PC.


Attempt to access the files on the drive.

If the IO device error reappears, return to Command Prompt. Input "format /fs:fat32 <drive>:" into the command-line prompt.


Replace "<drive>" with the letter assigned to the external hard drive.


Press "y" when the message "Proceed with Format (Y/N)?" appears.

The process will format the drive, erasing all data on the disk.


If the drive still fails to function after format, you will need to replace the drive.


Hope this helps




Nov 25, 2012 | Western Digital WD5000AAVS 500 GB SATA II...

1 Answer

I/O error on Buffalo HD-PET500U2 Ext Hard Drive


The message "The Request Could Not Be Performed Because of an I/O Device Error" appears when Windows is unable to read the data on a storage device.


If this error message appears when attempting to access the files on an input/output (I/O or IO) device, such as an external hard drive, the file system on the drive could be damaged, the drive could be infected with a virus or the data connector inside the device enclosure could have come loose.


If troubleshooting the drive fails to fix the IO device error, formatting the drive might repair the device.

Connect the external hard drive to the computer.


Run an antivirus program.


Click the "Scan" tab or button, then click "Custom."

Uncheck all items in the list except for the drive letter assigned to the external drive.


Click "OK." Click "Scan" or "Scan Now" to run a virus scan on the hard drive.

Quarantine or remove any infections the virus scanner detects.


Click "Start." Input "cmd.exe" into the search field.

Press "Enter" to open Command Prompt. Input "chkdsk <drive>: /f /r" into Command Prompt.


Replace "<drive>" with the letter assigned to your external hard drive.

Press "Enter" to run CheckDisk on the drive.


CheckDisk will search for and repair detected errors or bad sectors.


Burn the files on the external hard drive to a set of DVDs or move the files to another drive, if possible.

If the IO device error reappears when attempting to move the files, disconnect the external hard drive from the computer.


Remove the power adapter from the drive.

Check the documentation included with the drive for instructions to take the drive apart.


If no instructions are available, contact the manufacturer for instructions or find out if disassembling the drive will void the drive's warranty.


Remove the screws securing the faceplate to the drive or from the edge of the enclosure. Insert the edge of a small, flathead screwdriver in between either side of the enclosure to wedge both sides apart.


Check the connections to the drive.

Confirm that the IDE or SATA interface is plugged into the back of the drive.


Reassemble the external hard drive, reconnect the power adapter and reconnect the drive to the PC.


Attempt to access the files on the drive.

If the IO device error reappears, return to Command Prompt. Input "format /fs:fat32 <drive>:" into the command-line prompt.


Replace "<drive>" with the letter assigned to the external hard drive.


Press "y" when the message "Proceed with Format (Y/N)?" appears.

The process will format the drive, erasing all data on the disk.


If the drive still fails to function after format, you will need to replace the drive.


Hope this helps




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1 Answer

I am using windows xp home edition (SP2), when I'm going to insert an external drive to my pc, the external drive is detected but I cannot open it rather it appears "the request could not be performed...


Good Day!

is your HD Fell? have you try to open it to another computer? try it first. if the computer you inserted is OK. there seems a problem regardless to your computer. try to reformat it and install Win XP pro. (SP3)

Thanks and God Bless!

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