Slow backup performance or the error "Access is denied" occurs during a Granular Restore Technology (GRT) enabled Exchange or other GRT Agent backup to a Backup to Disk (B2D) folder
|Article:TECH52120|||||Created: 2010-01-15|||||Updated: 2011-09-21|||||Article URL http://www.symantec.com/docs/TECH52120|
Backups using GRT to a local or remote Backup to Disk (B2D) folder on an external RAID 5 drive or other types of hardware run slow or the job fails with error "Access is denied". (Figure 1)
GRT enabled backups of an Exchange database or other GRT Agent (Active Directory Agent, SharePoint Agent, etc...) to a tape completes successfully and at normal speed. If GRT is disabled, the backup to disk works at an acceptable speed.
Refer the following link for all supported MS controller devices:
2. The IDE, SCSI/RAID Controller, or HBA Manufacturer's latest driver/firmware should be installed.
3. Confirm that the target disk(s) is not heavily fragmented and run a disk defrag if necessary at a time when the backup is not running. For more information on this, refer to the following:
4. Run the Backup to Disk Test Tool on the B2D Target Machine.
5. Check the Disk Cache Settings on the B2D Target Machine. Depending on the machine's hardware and role in the network, disk caching may need to be either enabled or disabled to improve the backup performance. For more information on this, review the following Microsoft Articles:
Note: When checking the Disk Cache Settings please verify the settings on the RAID Controller as well.
HOW TO: Manually Enable/Disable Disk Write Caching
Access is denied.
Article URL http://www.symantec.com/docs/TECH52120