I/O Device Error

What Does "I/O Device Error" Mean?

"I/O Device Error", also known as "Input/Output Device Error", often pops out when one is attempting to access, cut, copy, write something on the storage device, including common external hard drive, flash drive or memory card, CD-Rom, DVD, CD and more (today, to simplify the description, we would focus on the widely-used former three types of storage devices).

Common Symptoms of "I/O Device Error" Issues

When your storage device unexpectedly gets these "I/O Device Error" issues, you often will receive three possible error messages saying:

1). "The request could not be performed because of an I/O device error."
2). "I/O error 32", "I/O error 21" or the similar "I/O error + codes".
3). "Only part of a read process memory request was completed" or "Only part of a write process memory request was completed".
If you do get one of these above listed errors when trying to access your hard drive or memory card stuffs, keep reading the below article and fix such issues by yourself.

Possible Reasons Behind "I/O Device Error" Problems

This "I/O Device Error" problem can be aroused by a series of reasons. Below are some major ones:

1). Faulty connection.
If this plunged storage device is incorrectly connected, you often will receive this "I/O Device Error" warning. When the computer USB port or storage device USB cable/USB adaptor or USB card Reader is damaged or broken, the computer is not able to detect your connected device normally and gives you such error message.
2). Device drivers
When the computer storage device drive is outdated, damaged or incompatible with your attached device, the common computer detection/reorganization also will be affected, which often bring you such error problems.
3). Storage device is detected with a wrong drive letter.
Sometimes, when your external hard drive, memory card or USB drive is recognized with a wrong drive letter, you also can get an "I/O Device Error" unwilling.
4). Damaged storage device.
Damaged or corrupted storage device (due to sudden computer shutdown/crash, unexpected device dropping/falling, device long-time use or too many device bad sectors, etc) also can result in unwanted device errors for users.

Methods to Fix Such "I/O Device Error" Problems

NO matter why and how you get such "I/O Device Error" messages, you do can follow these below steps to repair your attached storage device:

Method1: Check the storage device connection carefully.  
As we've mentioned above, this "I/O Device Error" problem can be caused by wrong connection. So, what you should do now is to firstly check the USB connection. Simply disconnect this storage medium and plunge it with another USB port or USB cable, USB Adaptor or USB card Reader to see whether it could be read normally there. If it is caused by faulty connection, after changing different USB cable or USB port, you often can read your desired information as usual. If it is still giving the same error, try this device on another computer to have a try. If unluckily it still has the same message popped out, this error must be caused by other reasons, merely go on your reading and check other elements as below.

Method2: Download, install or update your device driver.

If this "I/O Device Error" problem is caused by damaged, outdated or incompatible device drivers, open the official website of your computer, find the driver downloading part and download, install or update the latest device drivers. And then, disconnect this device and try it again on your computer to see whether it can be detected well there. If not, also do not feel depressing, you do have other ways to go.

Method 3: Change another drive letter for your attached storage device.

If neither of above mentioned two ways can help fix this "I/O Device Error" issue, you still can try to remove this problem by changing another drive letter. Do you know how to assign or change a new drive letter for a storage device in Disk Management? If not, follow below stops to go on:

Step1. Open the Disk Management interface in turn: Right Click "My Computer" > "Manage" > "Storage" > "Disk Management".
Step2. Right click your detected storage device listed there and choose "Change Drive Letter and Paths".
Step3. Click your shown storage device and press "Change" to go on.
And then, check whether you can access or use your stored information as you wish. If you are still receiving the same error, your storage device must be damaged somehow and try to fix as below.

Method 4: Run the Error-Checking tool when Storage Device Is Damaged

As you've learned above, the damaged storage device also can result in "I/O Device Error" problems. So, in this moment, no matter whether how and why your SD card is damaged, simply run the Windows CHKDSK tool to fix all possible problems like this:

Step1. Open "My Computer" to find your recognized storage device.
Step2: Right click this device to open "Properties" window.
Step3. Click the "Tool" tab to press "Check Now" button in the "Error-checking" section.
Step4. Mark the desired check disk options and start to scan this storage device. 

And then, patiently wait till the scanning process is accomplished at last. And, at last, check whether you will not receive such "I/O Device Error" message again.
Step5. Format this storage device

If all these above listed methods make no difference, you’d better format this plunged hard drive or memory card and check whether it can be restored. If not, your device must be seriously damaged and often cannot be repaired easily. Simply contact the hard drive repairing shops or agencies and consult them whether they do have some solutions for you.

Tips & Notes:

1). Recover Device Data with Data Recovery Software before or After Format
If you do have to format this plunge memory card or hard drive for resolving this "I/O Device Error" problem, to avoid unwanted data loss troubles, you'd better firstly try data recovery software to recover everything previous back. Of course, if you do have to format this storage device at first for some reasons, after the formatting process, such data recovery software also can help retrieve your previous information as much as possible.
2). Attempt to use this storage device on another computer
Such "I/O Device Error" issues are not always aroused by the storage device problems. They also can be resulted by the computer problems. So, if you are really not sure whether it is the problem of your connected memory card or hard drive, disconnect it and try it on another computer to confirm. If it is the problem of your attached storage device, you often will undoubtedly get the same error again there.


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