Manually free some disk space for creating new backups.When the backup disk is full and Windows Server Backup Automatic Disk Usage Management fails to function, you can simply take the following options: How to fix Windows Server 2008/2012/2016 backup disk full And because of this, WSB sometimes fails to backup due to disk full error, despite the automatic disk usage management feature. This is to ensure that you do not lose all your past backups in order to proceed the new backup. You should note that Windows Server Backup checks if the diff area can free up enough space before shrinking, and it will not shrink the diff area to less than 1/8 of target volume size. overwriting old backups, so why does the backup disk full error still occur occasionally? Why does Windows Server Backup disk full error occurĪs stated above, Windows Server Backup usually frees up space to accommodate new backups by shrinking the diff area, i.e. That is, when WSB detects there is not enough space on the disk to accommodate a new backup, the automatic disk management feature will shrink the storage space allocated for snapshots, deleting one or more old snapshots that occupy the shrunken diff area, along with the corresponding backup version. The built-in backup tool, Windows Server Backup (WSB) contains an automatic disk usage management feature to free up disk space. After you configure a disk for scheduled backup, it will automatically reuse the space occupied by older backups when creating new backups. How does WSB automatic disk usage management work Why didn't the latest backup overwrite as promised? I just want to keep recent backups. So, last night, I got "The scheduled backup did not finish successfully. It says "If you ignore this alert, the old backups on the backup disk will be overwritten by the new backups". I am running Windows Server 2012 Essentials, and got a alert "Free space is low in Server Backup". This will allow you to cleanup the WinSXS folder of any superseeded updates.Case: Windows Server Backup is running out of disk space and failing If " Windows Update Cleanup" is missing from the cleanup tool then you will also need the following KB installed if not already done so. Update: John highlighted in the comments: You can then start the tool by executing Cleanmgr.exe (Recommended) Copy 2 files to specific system folders and you can immediately use the tool:Ĭopy Cleanmgr.exe to %systemroot%\System32.Ĭopy to %systemroot%\System32\en-US.Also, installing the Desktop Experience feature will require a reboot of your server. I don’t recommend this as installing the Desktop Experience feature will not only install Disk Cleanup, but a lot of other utilities you likely don't need on a server (sound recorder, desktop themes, etc).
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