Backups fail with "Error reported: The request could not be performed because of an I/O device error"


The following error occurs due to a hardware issue related to either the Controller or the Storage Device.

Error Message

Storage device has reported an error on a request to read data from media.
Error reported: The request could not be performed because of an I/O device error.

UMI CODE :- V-79-57344-33992


In most of the cases, these messages are being reported due to hardware issue with either the controller or, more likely, a device that is attached to the controller. The hardware problems can be associated with poor cabling, incorrect termination or transfer rate settings, lazy or slow device responses to relinquish the SCSI bus, a faulty device, or, in very rare cases, a poorly written device driver.


Refer to the following articles by Symantec and Microsoft :

What does Event ID 5/7/9/11/15 mean while troubleshooting tape device related issues with Backup Exec -

How to troubleshoot Event ID 9,11 & 15 -


General Recommendations:

1. Make sure the latest Symantec device drivers are installed.

2. Perform tests after stopping the Removable Storage Management (RSM) service.

3. If the drive is connected to a SCSI RAID card, move the drive off to a separate SCSI card.

4. Run tracer.exe to monitor SCSI traffic for errors.



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