Tape Jobs fail with I/O errors or (SCSI) Bus resets

KB ID: 1887
Product: Veeam Backup & Replication
Version: All
Published: 2014-05-13
Last Modified: 2022-04-17
Get weekly article updates
By subscribing, you are agreeing to have your personal information managed in accordance with the terms of Veeam's Privacy Notice.

Cheers for trusting us with the spot in your mailbox!

Now you’re less likely to miss what’s been brewing in our knowledge base with this weekly digest

error icon

Oops! Something went wrong.

Please try again later.

Challenge

Failures occur during the File to tape or Backup to tape jobs. The jobname.log shows error messages similar to:

error: The request could not be performed because of an I/O device error
error: Tape fatal error.\nThe I/O bus was reset

Cause

Depending on the type of connection, controller or library used, periodic status requests may be handled too slowly and fill up the queue. As a result, Windows may try to recover by resetting the bus.

Solution

You may need to increase StorPort timeouts by creating a "StorPort" key with entries for all tape devices.

You can get DEVICEID & INSTANCE with the following PowerShell command:
gwmi -class win32_tapedrive

The Registry Values to be created/adjusted are found in the following key:

HKLM\System\CurrentControlSet\Enum\SCSI\DEVICEID\INSTANCE\Device Parameters\StorPort\

Value Name: BusyRetryCount
Value Type: DWORD (32-Bit) Value
Value Data: 1000 (DEC)

Value Name: BusyPauseTime
Value Type: DWORD (32-Bit) Value
Value Data: 1000 (DEC)

Value Name: BusyTimeoutCount
Value Type: DWORD (32-Bit) Value
Value Data: 1000 (DEC)

 

Reboot the tape server to apply the settings.

 

Example:

Demo
Click here to send feedback regarding this KB, or suggest content for a new KB.
To report a typo on this page, highlight the typo with your mouse and press CTRL + Enter.

Spelling error in text

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Thank you!

Thank you!

Your feedback has been received and will be reviewed.

Oops! Something went wrong.

Please try again later.

KB Feedback/Suggestion

This form is only for KB Feedback/Suggestions, if you need help with the software open a support case

By submitting, you are agreeing to have your personal information managed in accordance with the terms of Veeam's Privacy Notice.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Verify your email to continue your product download
We've sent a verification code to:
  • Incorrect verification code. Please try again.
An email with a verification code was just sent to
Didn't receive the code? Click to resend in sec
Didn't receive the code? Click to resend
Thank you!

Thank you!

Your feedback has been received and will be reviewed.

error icon

Oops! Something went wrong.

Please try again later.