Note: If this error occurs on a Hyper-V host when backing up VMs on that host, see KB1846.Increase the shadow copy storage area for the volume listed in the error event, or set the maximum size to “No limit.” To identify the volume listed in the event, run “mountvol” from a command prompt
; below the usage information will be a list of volume GUIDs and their associated mount points, if any.This size of the shadow storage area can be changed in the Shadow Copies utility, or from the command line.
Shadow Copies Utility (Server OS Only)
To access the utility, right click any volume and choose Configure Shadow Copies. On older server operating systems, this may instead be a tab in Properties.In the Shadow Copies utility:
- Select the volume with insufficient space;
- Click Settings…
- In the “Maximum size” box, either increase the limit, or choose “No limit”.
A limit of 15-20% of the total volume size may be needed on busy servers.
Command Line (Client or Server OS)
All commands below should be run from an administrator command prompt.
Use vssadmin list shadowstorage
to view existing shadow storage associations. If no association exists for any volume, the command response will be “No items found that satisfy the query.”Note:
When no shadow storage association exists for a volume, the shadow copies utility will display 10% of the volume or MinDiffAreaFileSize
, whichever is greater. However, Windows may set a different maximum size during shadow copy creation. While the default behavior works well for most volumes, setting a limit of 15-20% of the total volume size may be needed on busy servers.
If no association is listed for the volume, run vssadmin add shadowstorage
to set the size of the shadow storage area. For example, on a 1 TB volume labeled D:vssadmin add shadowstorage /for=D: /on=D: /maxsize=200GB
If a shadow storage association already exists, run vssadmin resize shadowstorage
to set the size of the shadow storage area. For example, on a 1 TB volume labeled D:vssadmin resize shadowstorage /for=D: /on=D: /maxsize=200GBThe /maxsize parameter is not optional, but can be set as /maxsize=UNBOUNDED