Differential Incremental Running a Full Backup

Question

Hello

We have a clustered Windows fileserver. Each drive has its own backup IP address assigned to it which follows the cluster if moved but everything stays on one side. After a successful synthetic full backup (528211835 KB) a differential incremental runs (15715783 KB), but when the next differential incremental starts it runs a full backup, currently (240176128 KB) why is this?

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Hope someone can supply an explanation, please?

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Thanks in advance!

marianne · Accepted Answer

Apologies - missed your 2-month-old reply....

Yes. The 'traditional' full needs to be kept in the same policy.&nbsp;
	This is how NBU knows that the Diff must be based on this Full backup.&nbsp;
	Just remove the backup window for the traditional full (to prevent automatic kick-off) and leave it in the same policy.

nicolai · Answer

Are all schdules in the same policy (they must be)?

The second diff - did it use another storage unit than the first full and first diff ?

Please post the policy definion as well:&nbsp;bppllist&nbsp;[policyname] -L

les_denniss · Answer

Hi Nicolai

Thanks for your help

All schedules are in the same policy. The differential incrementals write to the same disk

Please see output for bppllist - Thanks

&nbsp;

Policy Name:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;&lt; I have removed &gt;&gt;
	Options:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0x0
	template:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; FALSE
	audit_reason:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ?
	Names:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (none)
	Policy Type:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MS-Windows (13)
	Active:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; yes
	Effective date:&nbsp;&nbsp;&nbsp; 02/06/2004 12:39:12
	Client Compress:&nbsp;&nbsp; no
	Follow NFS Mnts:&nbsp;&nbsp; no
	Backup netwrk drvs:no
	Collect TIR info:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; yes, with move detection
	Mult. Data Stream: no
	Perform Snapshot Backup:&nbsp;&nbsp; no
	Snapshot Method:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (none)
	Snapshot Method Arguments: (none)
	Perform Offhost Backup:&nbsp;&nbsp;&nbsp; no
	Backup Copy:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
	Use Data Mover:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; no
	Data Mover Type:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2
	Use Alternate Client:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; no
	Alternate Client Name:&nbsp;&nbsp;&nbsp;&nbsp; (none)
	Use Virtual Machine:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
	Hyper-V Server Name:&nbsp;&nbsp;&nbsp;&nbsp; (none)
	Enable Instant Recovery:&nbsp;&nbsp; no
	Policy Priority:&nbsp;&nbsp; 95500
	Max Jobs/Policy:&nbsp;&nbsp; Unlimited
	Disaster Recovery: 0
	Collect BMR Info:&nbsp; no
	Keyword:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (none specified)
	Data Classification:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -
	Residence is Storage Lifecycle Policy:&nbsp;&nbsp;&nbsp; no
	Client Encrypt:&nbsp;&nbsp;&nbsp; no
	Checkpoint:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; yes
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Interval:&nbsp;&nbsp;&nbsp; 180
	Residence:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;&lt; server name &gt;&gt;_PureDisk
	Volume Pool:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Servers
	Server Group:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *ANY*
	Granular Restore Info:&nbsp; no
	Exchange Source attributes:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; no
	Exchange DAG Preferred Server: (none defined)
	Application Discovery:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; no
	Discovery Lifetime:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 seconds
	ASC Application and attributes: (none defined)
	Generation:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 194
	Ignore Client Direct:&nbsp; yes
	Enable Metadata Indexing:&nbsp; no
	Index server name:&nbsp; NULL
	Use Accelerator:&nbsp; no
	Optimized Backup:&nbsp; no
	Client/HW/OS/Pri/DMI/CIT:&nbsp; &lt;&lt; client name &gt;&gt; Windows-x64 Windows2008 0 0 0 0 ?
	Include:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; J:\*
	Schedule:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Differential-Incremental
	&nbsp; Type:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; INCR (1)
	&nbsp; Calendar sched: Enabled
	&nbsp;&nbsp; Included Dates-----------
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Monday, Week 1
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tuesday, Week 1
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Wednesday, Week 1
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thursday, Week 1
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Friday, Week 1
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Monday, Week 2
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tuesday, Week 2
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Wednesday, Week 2
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thursday, Week 2
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Friday, Week 2
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Monday, Week 3
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tuesday, Week 3
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Wednesday, Week 3
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thursday, Week 3
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Friday, Week 3
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Monday, Week 4
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tuesday, Week 4
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Wednesday, Week 4
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thursday, Week 4
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Friday, Week 4
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Monday, Week 5
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tuesday, Week 5
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Wednesday, Week 5
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thursday, Week 5
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Friday, Week 5
	&nbsp;&nbsp; Excluded Dates----------
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; No specific exclude dates entered
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; No exclude days of week entered
	&nbsp; Retention Level:&nbsp;&nbsp;&nbsp;&nbsp; 1 (2 weeks)
	&nbsp; u-wind/o/d:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 0
	&nbsp; Incr Type:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DELTA (0)
	&nbsp; Alt Read Host:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (none defined)
	&nbsp; Max Frag Size:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 MB
	&nbsp; PFI Recovery:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
	&nbsp; Maximum MPX:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4
	&nbsp; Number Copies:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
	&nbsp; Fail on Error:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
	&nbsp; Residence:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;&lt; server name &gt;&gt;_PureDisk
	&nbsp; Volume Pool:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (same as policy volume pool)
	&nbsp; Server Group:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (same as specified for policy)
	&nbsp; Residence is Storage Lifecycle Policy:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
	&nbsp; Schedule indexing:&nbsp;&nbsp; 0
	&nbsp; Daily Windows:
	&nbsp;&nbsp; Day&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Open&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Close&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; W-Open&nbsp;&nbsp;&nbsp;&nbsp; W-Close
	&nbsp;&nbsp; Sunday&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Monday&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 016:00:00&nbsp; 025:00:00&nbsp;&nbsp; 040:00:00&nbsp; 049:00:00
	&nbsp;&nbsp; Tuesday&nbsp;&nbsp;&nbsp;&nbsp; 016:00:00&nbsp; 024:55:00&nbsp;&nbsp; 064:00:00&nbsp; 072:55:00
	&nbsp;&nbsp; Wednesday&nbsp;&nbsp; 016:00:00&nbsp; 024:55:00&nbsp;&nbsp; 088:00:00&nbsp; 096:55:00
	&nbsp;&nbsp; Thursday&nbsp;&nbsp;&nbsp; 016:00:00&nbsp; 024:55:00&nbsp;&nbsp; 112:00:00&nbsp; 120:55:00
	&nbsp;&nbsp; Friday&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 016:00:00&nbsp; 025:00:00&nbsp;&nbsp; 136:00:00&nbsp; 145:00:00
	&nbsp;&nbsp; Saturday&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	Schedule:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Synthetic_Monthly_Full
	&nbsp; Type:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; FULL (0)
	&nbsp; Calendar sched: Enabled
	&nbsp;&nbsp;&nbsp; Allowed to retry after run day
	&nbsp;&nbsp; Included Dates-----------
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Friday, Week 5
	&nbsp;&nbsp; Excluded Dates----------
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; No specific exclude dates entered
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; No exclude days of week entered
	&nbsp; Retention Level:&nbsp;&nbsp;&nbsp;&nbsp; 0 (2 days)
	&nbsp; u-wind/o/d:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 0
	&nbsp; Incr Type:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DELTA (0)
	&nbsp; Alt Read Host:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (none defined)
	&nbsp; Max Frag Size:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 MB
	&nbsp; Synthetic:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
	&nbsp; Checksum Change Detection: 0
	&nbsp; PFI Recovery:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
	&nbsp; Maximum MPX:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
	&nbsp; Number Copies:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
	&nbsp; Fail on Error:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
	&nbsp; Residence:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;&lt; server name &gt;&gt;_monthly_duplication
	&nbsp; Volume Pool:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (same as policy volume pool)
	&nbsp; Server Group:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (same as specified for policy)
	&nbsp; Residence is Storage Lifecycle Policy:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
	&nbsp; Schedule indexing:&nbsp;&nbsp; 0
	&nbsp; Daily Windows:
	&nbsp;&nbsp; Day&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Open&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Close&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; W-Open&nbsp;&nbsp;&nbsp;&nbsp; W-Close
	&nbsp;&nbsp; Sunday&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Monday&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Tuesday&nbsp;&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Wednesday&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Thursday&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Friday&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 023:00:00&nbsp; 046:00:00&nbsp;&nbsp; 143:00:00&nbsp; 166:00:00
	&nbsp;&nbsp; Saturday&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	Schedule:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Synthetic_Weekly_Full
	&nbsp; Type:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; FULL (0)
	&nbsp; Calendar sched: Enabled
	&nbsp;&nbsp;&nbsp; Allowed to retry after run day
	&nbsp;&nbsp; Included Dates-----------
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Friday, Week 1
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Friday, Week 2
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Friday, Week 3
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Friday, Week 4
	&nbsp;&nbsp; Excluded Dates----------
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; No specific exclude dates entered
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; No exclude days of week entered
	&nbsp; Retention Level:&nbsp;&nbsp;&nbsp;&nbsp; 0 (2 days)
	&nbsp; u-wind/o/d:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 0
	&nbsp; Incr Type:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DELTA (0)
	&nbsp; Alt Read Host:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (none defined)
	&nbsp; Max Frag Size:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 MB
	&nbsp; Synthetic:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
	&nbsp; Checksum Change Detection: 0
	&nbsp; PFI Recovery:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
	&nbsp; Maximum MPX:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
	&nbsp; Number Copies:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
	&nbsp; Fail on Error:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
	&nbsp; Residence:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;&lt; server name &gt;&gt;_weekly_duplication
	&nbsp; Volume Pool:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (same as policy volume pool)
	&nbsp; Server Group:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (same as specified for policy)
	&nbsp; Residence is Storage Lifecycle Policy:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1
	&nbsp; Schedule indexing:&nbsp;&nbsp; 0
	&nbsp; Daily Windows:
	&nbsp;&nbsp; Day&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Open&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Close&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; W-Open&nbsp;&nbsp;&nbsp;&nbsp; W-Close
	&nbsp;&nbsp; Sunday&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Monday&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Tuesday&nbsp;&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Wednesday&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Thursday&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00
	&nbsp;&nbsp; Friday&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 023:00:00&nbsp; 046:00:00&nbsp;&nbsp; 143:00:00&nbsp; 166:00:00
	&nbsp;&nbsp; Saturday&nbsp;&nbsp;&nbsp; 000:00:00&nbsp; 000:00:00

les_denniss · Answer

I have also checked the override policy storage selection so it writes to the same disk - thanks

nicolai · Answer

Do you have a tradittional full to begin with ?

les_denniss · Answer

Yes I do have a traditional weekly full. I had this problem last week so a run a weekly full then differential incrementals but the same happened. So I ran a synthetic full and started again.

&nbsp;

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