I have problem with my backup in Netapp Protection Manager, the backup using snapvault technology just hang and unable to run any backup at all. This is a bug according to them and will be fixed in 8.0.2(hopefully). I always wanted to know the proper way to remove snapvault relation shop and i am doing this today.
Note: create case in Netapp to assist you in case you are uncertain of anything, this guideline is just for information sharing and my own references.


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To list out the dfpm data set for job id(check from source snapshot)
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C:\Documents and Settings\admin1>dfpm dataset list -m 23953
Id Node Name Dataset Id Dataset Name Type Name
---------- -------------------- ---------- -------------------- --------------- -------------------------------------------------------
20538 filerSource 23953 VOL A Dataset new volume filerSource:/volumeA
23955 filerDest 23953 VOL A Dataset new volume filerDest:/volume_A_Dataset_new_backup
24400 filerDest 23953 VOL A Dataset new volume filerDest:/volume_A_Dataset_new_backup_1

C:\Documents and Settings\admin1>dfpm dataset list -x 23953
Id: 23953
Name: VOL A Dataset new
Policy: Backup Policy For PG t28
Description:
Owner:
Contact:
Volume Qtree Name Prefix:
DR Capable: No
Requires Non Disruptive Restore: No

Node details:

Node Name: filerSource
Resource Pools:
Provisioning Policy:
Time Zone:
DR Capable: No
vFiler:

Node Name: filerDest
Resource Pools: PG DRNAS BACKUP 02
Provisioning Policy: No Dedupe Policy for Secondary
Time Zone:
DR Capable: No
vFiler:

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After

C:\Documents and Settings\admin1>dfpm dataset snapshot list 23953
Id Name Unique Id Volume Timestamp Versioned Dependencies % of Total Blocks
---- --------------- ------------ --------------- -------------------- ---------- --------------- ----------
75019592 dfpm_base(dataset-id-23953)conn1.3 1306675183 filerSource:/volumeA 29 May 2011 21:19:43 No SnapVault 33% (19%)
83770083 dfpm_base(dataset-id-23953)conn1.0 1310908962 filerSource:/volumeA 17 Jul 2011 21:22:42 No SnapVault,acs 13% (11%)
86355690 dfpm_base(dataset-id-25559)conn1.1 1311686499 filerSource:/volumeA 26 Jul 2011 21:21:39 No Busy - SnapVault 3% (2%)
86355689 dfpm_base(dataset-id-25559)conn1.0 1311772921 filerSource:/volumeA 27 Jul 2011 21:22:01 No Busy - SnapVault,acs 0% (0%)
86377105 nightly.0 1311782476 filerSource:/volumeA 28 Jul 2011 00:01:16 No None 0% (0%)

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To delete snapshot in source from OM databse
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C:\Documents and Settings\admin1>dfpm dataset snapshot delete 23953 "filerSource:/volumeA" 75019592
Dataset dry run results
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Do: Delete snapshots 'dfpm_base(dataset-id-23953)conn1.3' of volume filerSource:/volumeA (20538).
Effect: Selected snapshots will be deleted.
Following snapshots have applications dependent on them:
dfpm_base(dataset-id-23953)conn1.3 - SnapVault

Started job 13340 to delete snapshot(s) of the volume 'filerSource:/volumeA' of the dataset 'VOL A Dataset new' (23953).

C:\Documents and Settings\admin1>dfpm dataset snapshot delete 23953 "filerSource:/volumeA" 83770083
Dataset dry run results
----------------------------------
Do: Delete snapshots 'dfpm_base(dataset-id-23953)conn1.0' of volume filerSource:/volumeA (20538).
Effect: Selected snapshots will be deleted.
Following snapshots have applications dependent on them:
dfpm_base(dataset-id-23953)conn1.0 - SnapVault, acs

Started job 13341 to delete snapshot(s) of the volume 'filerSource:/volumeA' of the dataset 'VOL A Dataset new' (23953).

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To delete snapshot at destination, take few hours.
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[root@linux tiwlim]# rsh filerDest snapvault stop filerDest:/vol/volume_A_Dataset_new_backup_1/t28lp_ip
Stopping /vol/volume_A_Dataset_new_backup_1/t28lp_ip is permanent.
The secondary qtree will be deleted.
Further incremental updates will be impossible.
Data already stored in snapshots will not be deleted.
This may take a long time to complete.
Are you sure you want to do this? y
Snapvault configuration for the qtree has been deleted.