I have a SQL job which created a transaction log backup which is around ~2.1Tb. Using the same SQL job few more log backups are created and those are of low size. (~200 MB). When I tried to delete the first log backup(~2.1 TB) I get the message that "You require permission from the computer's administrator to make changes to this file" and I am not able to delete it. My user is an admin user and I am able to delete the other log backups(of less size) created.

For the first log backup, the properties are also different as shown below. I cannot see the owner etc.

First back file

For the other backups of less size, I can see the owner and the permission details as shown.

Second backup file

I tried different methods to delete the log backup file like:

  • Tried command prompt
  • Tried to delete SQL script using exec xp_cmdshell
  • Tried to delete form a network share

Please help me if you guys have any idea on this issue.

I think it has something to do with the file size,not sure though.

Here is the contents of Advanced settings. Adanced settings

  • Try to take ownership and then fix the permission. After that, try to delete the file. – DxTx Aug 7 at 20:25
  • Has the job finished successfuly when it created the log backup of 2.1Tb? Have you tried taking ownership of the file? take ownership of file in windows – Ronaldo Aug 7 at 20:26
  • Just an observation: If you successfuly deletes this log backup file, you might break the backup log chain and end up with subsequent log backups that won't work until you take next full backup. – Ronaldo Aug 7 at 20:30
  • @Ronaldo I have full log backup after that log backup.So i don't mind deleting this log backup. – spark Aug 7 at 20:31
  • Tried to take ownership.I went to security--> Advanced --> Then i shows that cannot display owner and on clicking change i get the message that "You do not have permission to view or edit this objects's permission settings." " – spark Aug 7 at 20:32

Try taking ownership through Command Prompt:

Try the following in CMD Administrator:

TAKEOWN /F "path"


ICACLS "path" /grant administrators:F

Replace path with the file destination and you can also change "Administrator" to what ever admin you are using. Remove quotes around the path.

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