Core Information Related to SQL Error 15105

While backup SQL Server database on shared disk within network if the backup file (.bak) denies access, it implies that SQL Server error 15105 has occurred. The corresponding error seems similar to this:

"Cannot open backup device "\\xxxxxxxx\xxxx.bak". Operating System Error 5 (failed to retrieve text for this error. Reason: 15105). (Microsoft.SQLServer.Smo)"

Sometimes the error message fluctuating on machine may vary and appears while user trying to restore its database from .bak file and the following mentioned syntax addresses to the local disk on network;

"Operating System Error 5 (Access Denied)"

SQL Error Code 15105: Resolution Procedures

While Creating Backup:

  • Free the drive volume to enable expansion of SQL backup files.
  • Run defragmentation process and analyze the level for all volumes to ensure that it is more than 15%.

While Restoring Backup:

You can follow the under mentioned workaround to rectify SQL Server restore error 15105:

  • Go to the location on shared network where the original folder locates.
  • Right click on the folder and select "Sharing and Security" option.
  • In the "Sharing" tab, click on "Permissions"
  • Next, assign "Full Access" privilege to target account for which backup is generated and if you are not concerned about security, you may assign "Full Access" to "EVERYONE" for a particular period of time. Once the restoring process is completed, you can change\ modify the assigned permissions.
  • Once you are done with applying permissions and privileges, click on 'Apply' and then 'OK'.
  • Afterwards, click on the "Security" tab and add the specified account to whom full access permissions are granted and assign appropriate privileges to the accounts.
  • Click on 'Apply' and further select 'OK'.

Alternate Solution To Fix The Error Message

Either of the following given methods may helps in resolving the Microsoft SQL Server error 15105. If none of the above stated work around/measures seems to be helpful, there are possibilities that the SQL BAK file is dealing with corruption issue that leads to inaccessibility of the database backup files.

In that case, the only way to efficiently recover corrupt and inaccessible backup files is SQL backup recovery software. The tool helps in recovering SQL DB backup and fix MS SQL Server error 15105 and offers to restore them in either "SQL Server Database" (version 2014 and lower) or "SQL Server compatible Scripts" on local storage media.

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