How can I resolve "Shadow copy storage could not grow in time" or Disk IO errors when using the Barracuda Backup Agent?

Solution #00005948

1. Make sure server and instance is fully patched.
2. Adjust page file to 1.5 times the amount of RAM:
   1. Open System in Control Panel.
   2. On the Advanced tab, under Performance, click Settings.
   3. On the Advanced tab, under Virtual memory, click Change.
   4. Under Drive [Volume Label], click the drive that contains the paging file you want to change.
   5. Under Paging file size for selected drive, click Custom size, and type a new paging file size in megabytes in the Initial size (MB) or Maximum size (MB) box, and then click Set.
   • Note: If you decrease the size of either the initial or maximum page file settings, you must restart your computer to see the effects of those changes. Increases typically do not require a restart. 
   • http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/sysdm_advancd_perform_change_vmpagefile.mspx?mfr=true
3. Set shadow copies on drive to unlimited or move shadow copies to different partition:
   • http://technet.microsoft.com/en-us/library/cc734457(v=ws.10).aspx
4. Ensure that the Backup Agent is installed on a drive with enough space to make a temporary copy of the backup.