Backup to Disk Issue for SharePoint 2007

Recently added licenses for backup of MOSS (2007) Farm to our BE2010 solution.  We have one volume for B2D (14TB) and it is configured for dedupe. All B2D jobs are Full Backups and then Duplicate to Tape, point to the same Media Sets and run fine except for MOSS. The job fails with a security error (see below) every time on the same SiteContent and causes the whole job to report as "Failed" even though it appears that the data is there. The account used to backup the Farm can login to all site content. The error for the SiteContent is "Error: e0008445 - The media operation was terminated by the user.". The job history shows Error Code E0001602.

There is a Duplicate job associated to the d2d job and it subsequently fails every time (approx. 50-60MB data copied) with the following error "Final error: 0xe00084e4 - The DC2000 cartridge has was formatted with an unrecognized format. Final error category: Backup Media Errors (job history shows Error Code E00084E4). I assume that the Duplicate job fails because it sees that there was a media error with the parent job.

We followed the best practices guide when setting up the job and I cannot see why it would be failing. The job log makes it look like the issue is related to the B2D media set. Perhaps I need to setup a different media set for MOSS?  The settings are pretty generic so I cannot see a reason for failure.  This is a new solution for us... a Dell PowerVault DL Backup to Disk DL2200 with an iSCSI attached MD1200 with 12 2TB drives (RAID5) so we may have something misconfigured.
 

Thanks in advance for any help.

Job name            : SharePoint Farm1-SharePoint-Full Backup
Job type            : Backup
Job status          : Failed
Job log             : C:\Program Files\Symantec\Backup Exec\Data\BEX_IUBEXEC01_00084.xml
Server name         : IUBEXEC01
Selection list name : SharePoint

Device name         : B2D - Dedupe:6
Target name         : B2D - Dedupe
Media set name      : Daily Media Set 1

All Media Used
OST00000038-467AB5B0E2F9FE78

Error category    : Security Errors
Error             : e0001602 - Access is denied (Share point backup).

For additional information regarding this error refer to link V-79-57344-5634

AOFO: Started for resource: "Board Site\Content-DB 1 (Server1\BoardMemberSiteContent)". Advanced Open File Option used: Microsoft Volume Shadow Copy Service (VSS).
The following volumes are dependent on resource: "E:" .
The snapshot provider used by VSS for volume E: - Microsoft Software Shadow Copy provider 1.0 (Version 1.0.0.7).
Set Information - Board Site\Content-DB 1
                  (Server1\BoardMemberSiteContent)
                        Backup Set Information
Family Name: "Media created 3/4/2011 6:00:02 PM"
Backup of "Board Site\Content-DB 1 (Server1\BoardMemberSiteContent)"
Backup set #1 on storage media #1
Backup set description: "Daily full backup of SharePoint"
Backup Method: Full - Back up entire database
The option to enable the restore of individual items from the database backup was selected for this backup.

Backup started on 3/4/2011 at 6:25:43 PM.
Backup Set Detail Information
Media Label: IMG000145
GRT backup set folder: \\.pdvfs\BEXEC01\2\BEData\IMG000145
This operation is being coordinated through the server: Server0

Backup completed on 3/4/2011 at 6:28:01 PM.
Backup Set Summary
Processed 52,316,452 bytes in  2 minutes and  18 seconds.
Throughput rate: 21.7 MB/min
Compression Type: None

This backup set may not contain any data.