If a SharePoint backup or restore operation fails with the Share is unavailable message, use this procedure to identify the process using the share and determine how to proceed. Only one restore or backup job per farm can run at any given time.
1 Select the desired SharePoint application in the Navigation pane.
2 Select Settings > System Monitoring > Restore Disk images.
3 Select Application Restore Images. A list of restore images displays.
4 Click Refresh to ensure that the list is current.
5 If you see backup in the Message column, a backup or full catastrophic restore is currently running for this farm. Once it completes, you can tear down the share and then perform the next backup or restore operation.
• Check running jobs on the Status > Present blind to see whether this is a backup or full restore. See Monitoring running backup jobs for details.
• If a backup is running, either wait for the backup to complete or terminate the backup.
• If a restore is running, you must wait for it to complete. Terminating a restore in process can leave the farm in an inconsistent state.
6 If you see restore in the Message column, the share has not yet been torn down for a prior item-level restore. Disconnect any network drive mappings to the share, then tear it down by selecting it in the grid and clicking Tear Down. Once the share is torn down, you can run the next backup or restore operation.