'How to remove a drive letter from the - MS System Reserved partition' It is not required for these partitions to have drive letter associations and allocating a drive letter can cause VSS to fail.įor more information on correcting this please see this article: Note: The same is also true of OEM utility partitions such as DELL utility partitions. If a drive letter is assigned then this can cause problems with Microsoft Volume Shadow copy Service ( VSS). Ordinarily, this partition does not have a drive letter assigned to it. The Microsoft System Reserved ( MSR) partition is required to boot Windows 7 and later operating systems. You may have inadvertently allocated a drive letter to the Microsoft System Reserved partition ( MSR) or you may have too many restore points on your system. Shadow storage space is used for system restore points and by Macrium Reflect. Solution 2 - Increase shadow storage spaceĮrror code 0x8004231f indicates VSS_E_INSUFFICIENT_STORAGE (Insufficient storage space for the Shadowcopy).

Solution 1 - Remove drive letters allocated unnecessarily to small partitions 0x8004231f - Failed to Create Volume Snapshot

Macrium reflect error code 9