Restoration of Differential Backup

Hi,
I am running Microsoft SQL server 2008 in our environment. I have created one new database and configured Full and differential Backups.Full backup on every week and differential backup on every day.Now the database went to recovery mode accidentally.
I have not yet taken Full backup for that particular database.I have only the Differential backup.
While i am trying to restore that differential backup its showing an error.Its not allowing me to restore.
Please help me to solve this problem.
Regards,
vinodh selvaraj.
Vinodh Selvaraj
Hello,
You cannot take differential backup without taking full backup.You have to first restore full backup with no recovery and then latest differential backup taken after full backup with recovery.
What is the error which you are facing?
Duplicate post
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/91c2ac7e-b122-426a-8a52-62ad452551c0/restoration-of-differential-backup?forum=sqldatabaseengine
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

Similar Messages

Restoring the Differential backup file after the full back up restore

Hi All,
This is my full back up restore script
RESTORE DATABASE VSO
FROM DISK = 'C:\DBbackup\\\VSO.bak' WITH
MOVE N'VSO' TO N'C:\PrestageRestoreTest\DATA_LOG\\VSO_Primary.mdf',
MOVE N'VSO_log' TO N'C:\PrestageRestoreTest\DATA_LOG\\VSO_Primary.ldf',
NOUNLOAD, REPLACE, STATS = 10;
After that i want restore Differential back up file on top of that , what is the script?
Thiru

So below will workout, Am I correct?
RESTORE DATABASE VSO
FROM DISK = 'C:\DBbackup\\\VSO.bak' WITH
MOVE N'VSO' TO N'C:\PrestageRestoreTest\DATA_LOG\\VSO_Primary.mdf',
MOVE N'VSO_log' TO N'C:\PrestageRestoreTest\DATA_LOG\\VSO_Primary.ldf',
REPLACE, STATS = 10,NORECOVERY;
RESTORE DATABASE VSO
FROM DISK = 'C:\DBbackup\\\VSO_Diff.bak' WITH
MOVE N'VSO' TO N'C:\PrestageRestoreTest\DATA_LOG\\VSO_Primary.mdf',
MOVE N'VSO_log' TO N'C:\PrestageRestoreTest\DATA_LOG\\VSO_Primary.ldf',
REPLACE, STATS = 10,RECOVERY;
Thiru

Restore Differential Backup

Hi Balmukund,
We are using Sql server 2005 in production server.we are maintaining two servers.. one for current day & another for Archive data .For the past few months we taking the full backup & restoring the same in the Archive sever.Now the volume
got increased & it takes too much time to restore the full backup.So i am planning to restore the differential backup on the daily basis.I am planning as mentioned below,
Weekly once (say Sunday)- Full backup
Daily backup say Monday to Saturday) - Differential backup.
So i can restore the full backup on day 1 morning.
and can restore differential backup on day 2 morning.
From day 3 to day 6 onwards,how can i restore the same.
Kindly send the script for the same or give me any other idea for the same.

Hi... Balmukund
Restored the full backup on day 1 morning.
and restored differential backup on day 2 morning
From day 3 onwards restored the latest differential backup and
changed the database to Standby / No recovery mode
for some reasons, I changed the database mode using the following script.
ALTER DATABASE [DatabaseName] SET READ_WRITE WITH NO_WAIT
Now my question is ,
Kindly confirm Is it possible to restore differential backup in that database
What was the output of your alter database command? Also, if your db is still in restoring mode, you can restore additional diff backups on it. You can check the status of your db with the below query. If the status = online and is_in_standy = 0 then
you have recovered the db and cannot restore additional backups. Will need to restart from full and lates diff again. HTH
select
name,
state_desc,is_in_standby
from sys.databases
HTH...

Procedure restore Differential backup and to restore windows 2003 server

Hello All,
i am sticking at some of the points
1. As per company policy they want to take full SAP offline + Redo log files backup once every two week and twice a week the differential backup. I suggested them the differential backup twice a week but now i have a question in mind since i never done it practically Do i need to have anything else like Log file to restore the Differential backup apart from full SAP backup or i can restore data with only Full SAP backup and differential backup.
2. I am not much familiar with Windows 2003 server backup, If i take full Widows 2003 server backup will i be able to restore windows server along with installed SAP and all other software in case something happen to my server.
if the answer is yes what are the pre-requisite if there be any to do the same. from the pre-requisite i mean do i need to be on same hardware as my previous server was or i can restore it on any other system too?
i will appreciate any reply on the same.
Mani

Hi Mandy,
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     Should the database need to be restored to thursday @ 4:30 AM, you will restore Wednesday full backup + Thursday diffential + any log files backup taken there after.
Windows 2003 Backup:
            Regarding this, You do not have to take Full Windows backup every day. You may take backup of few files / network drives, which can be restored directly while you are logged in to Server. It is sright forward.
           Sienario: When whole C drives of Windows crashed. To prepare for this sicenaro, you should take Windows system backup when ever you make chnages to kernal, SQL upgrade or before and after Windows patching.
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Krishna

Restore log and differential backups on a Publication database.

Hi, i have the following issue, i have to restore a log backup and a differential backup in a publication database, the problem is that i want to keep the publications and the subscriptions without recreate the subscriptions.
So how can i perform this goal :/ is somebody know how can i do that please let me know :D !!! thanks in advance.
In my case is a merge replication....

For merge replication you do not need to worry about the log reader agent - in fact there should not be one. Ensure that you use the keep_replication switch when doing the restore.
Note that for merge replication the subscriber will backfill the publisher with changes in the publisher which are not in the subscriber. After this is done you might want to do a tablediff, but it should not be necessary, depending on how recent your full
and differential backups were done.
looking for a book on SQL Server 2008 Administration?
http://www.amazon.com/Microsoft-Server-2008-Management-Administration/dp/067233044X looking for a book on SQL Server 2008 Full-Text Search?
http://www.amazon.com/Pro-Full-Text-Search-Server-2008/dp/1430215941

Differential backup and tlog backup

Hi,
What is the advantage of doing a differential backup along with transactional log backup? For instance, if I'm planning on doing a weekly full backup and daily transactional log backups what does doing an differential backup get me? Does it make restoring
faster? Is it better to have that differential in case one of the transactional log backups are corrupt?
Please advise.
Thanks,
Phil

What is the advantage of doing a differential backup along with transactional log backup? For instance, if I'm planning on doing a weekly full backup and daily transactional log backups what does doing an differential backup get me? Does it make restoring
faster
Phil,
The best use of Differential backup is to reduce the RTO. It does not have any much special meaning. There is no disadvantage as such apart from disk getting filled with too many diff backups.
It makes restoring faster in sense that you have to restore fewer numbers of backup and this decreases time to bring DB online when disaster strikes.
Is it better to have that differential in case one of the transactional log backups are corrupt?
If transaction log is corrupt there are chances that differential backup could also be corrupt. Your question does not have actual meaning. I guess you wanted to ask can we skip transaction log backup and restore latest Diff backup. Well you can as long
as it is not corrupt.
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it
My Technet Wiki Article
MVP

Veritas MS SQL differential backup interrupt MS SQL Native differential backup

I have MS SQL 2005 Enterprise edition and I am taking weekly(Every Sunday) full backup and daily differential backup using Veritas backup tool.
Now I got request from application team to take SQL native full backup on Tuseday and daily differential backup till next 2 days(i.e., till Thursday.) and keep intact current veritas backup strategy of daily differential and weekly full backup
Now my question is will My MS SQL differential native backup will hamper by daily Veritas SQL differential backup or vice versa.
Thanks in Advance!!!!!

Hi,
You should ask Veritas about this question whether Veritas backup would affect SQL Server backup or not I guess it will do.
Now a solution here can be
copy only backup. But unfortunately there is no meaning of differential copy only backup but you can take copy only log backup. What copy only backup does is it does not affect the current backup sequence which is occurring neither effects the restore.
Now since you already have full and diff backup in place why cant you use Veritas backup.
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it
My Technet Articles

Differential backup files are almost the same size as full backups.

Hello All,
I have done a little research on this topic and feel like we are not doing anything to cause this issue. Any assistance is greatly appreciated.
The details: Microsoft SQL Server 2008 R2 (SP2) - 10.50.4297.0 (X64) Nov 22 2013 17:24:14 Copyright (c) Microsoft Corporation Web Edition (64-bit) on Windows NT 6.1 <X64> (Build 7601: Service Pack 1) (Hypervisor). The
database I am working with it 23GB. The full backup files are 23GB, differentials are 16GB (and growing) and transaction logs bounce between 700KB to 20MB. The backup schedules with T-SQL follow:
T-Log: daily every four hours
BACKUP LOG [my_dabase] TO DISK = N'F:\Backup\TLog\my_dabase_backup_2015_03_23_163444_2725556.trn' WITH NOFORMAT, NOINIT, NAME = N'my_dabase_backup_2015_03_23_163444_2725556', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
Diff: once daily
BACKUP DATABASE [my_database] TO DISK = N'F:\Backup\Diff\my_database_backup_2015_03_23_163657_1825556.dif' WITH DIFFERENTIAL , NOFORMAT, NOINIT, NAME = N'my_database_backup_2015_03_23_163657_1825556', SKIP, REWIND, NOUNLOAD, STATS =
10
GO
declare @backupSetId as int
select @backupSetId = position from msdb..backupset where database_name=N'my_database' and backup_set_id=(select max(backup_set_id) from msdb..backupset where database_name=N'my_database' )
if @backupSetId is null begin raiserror(N'Verify failed. Backup information for database ''my_database'' not found.', 16, 1) end
RESTORE VERIFYONLY FROM DISK = N'F:\Backup\Diff\my_database_backup_2015_03_23_163657_1825556.dif' WITH FILE = @backupSetId, NOUNLOAD, NOREWIND
GO
Full: once weekly
BACKUP DATABASE [my_database] TO DISK = N'F:\Backup\Full\my_database_backup_2015_03_23_164248_7765556.bak' WITH NOFORMAT, NOINIT, NAME = N'my_database_backup_2015_03_23_164248_7765556', SKIP, REWIND, NOUNLOAD, STATS = 10
GO
declare @backupSetId as int
select @backupSetId = position from msdb..backupset where database_name=N'my_database' and backup_set_id=(select max(backup_set_id) from msdb..backupset where database_name=N'my_database' )
if @backupSetId is null begin raiserror(N'Verify failed. Backup information for database ''my_database'' not found.', 16, 1) end
RESTORE VERIFYONLY FROM DISK = N'F:\Backup\Full\my_database_backup_2015_03_23_164248_7765556.bak' WITH FILE = @backupSetId, NOUNLOAD, NOREWIND
GO
As you can probably tell we are not doing anything special in the backups, they are simply built out in MSSQL Management Studio. All databases are set to full recovery mode. We do not rebuild indexes but do reorganize indexes once weekly and also update
statistics weekly.
Reorganize Indexes T-SQL (there are 255 indexes on this database)
USE [my_database]
GO
ALTER INDEX [IDX_index_name_0] ON [dbo].[table_name] REORGANIZE WITH ( LOB_COMPACTION = ON )
GO
Update Statistics T-SQL (there are 80 tables updated)
use [my_database]
GO
UPDATE STATISTICS [dbo].[table_name]
WITH FULLSCAN
GO
In a different post I saw a request to run the following query:
use msdb
go
select top 10 bf.physical_device_name, bs.database_creation_date,bs.type
from dbo.backupset bs
inner join dbo.backupmediafamily bf on bf.media_set_id=bs.media_set_id
where bs.database_name='my_database'
order by bs.database_creation_date
Results of query:
physical_device_name database_creation_date type
F:\Backup\Full\my_database_backup_2015_03_07_000006_2780149.bak 2014-02-08 21:14:36.000 D
F:\Backup\Diff\Pre_Upgrade_OE.dif 2014-02-08 21:14:36.000 I
F:\Backup\Diff\my_database_backup_2015_03_11_160430_7481022.dif 2015-03-07 02:58:26.000 I
F:\Backup\Full\my_database_backup_2015_03_11_160923_9651022.bak 2015-03-07 02:58:26.000 D
F:\Backup\Diff\my_database_backup_2015_03_11_162343_7071022.dif 2015-03-07 02:58:26.000 I
F:\Backup\TLog\my_database_backup_2015_03_11_162707_4781022.trn 2015-03-07 02:58:26.000 L
F:\Backup\TLog\my_database_backup_2015_03_11_164411_5825904.trn 2015-03-07 02:58:26.000 L
F:\Backup\TLog\my_database_backup_2015_03_11_200004_1011022.trn 2015-03-07 02:58:26.000 L
F:\Backup\TLog\my_database_backup_2015_03_12_000005_4201022.trn 2015-03-07 02:58:26.000 L
F:\Backup\Diff\my_database_backup_2015_03_12_000005_4441022.dif 2015-03-07 02:58:26.000 I
Is your field ready?

INIT basically intializes the backup file, in other words, it will overwrite the contents of the existing backup file with the new backup information.
basically, what you have now is you are appending all you backup files (differentials) one after the other (like chain).
you do not necessarily have to do it. these differential backups can exist as different files.
Infact, I would prefer them to separate, as it gives quick insight on the file, instead doing a "restore filelist" command to read the contents of the backup file.
The point Shanky, was mentioning is that : he wants to make sure that you are not getting confused between the actual differential backup file size to the physicial file size(since you are appending the backups) example : if you differential backup is 2
gb, and over the next five you take a differential backup and append to a single file,like you are doing now, the differential backup file size is 2gb but you physicial file size is 10Gb. he is trying to make sure you are confused between these
two.
Anyways, did you get a chance to run the below query and also did you refer to the link I posted above. It talks a case when differential backups can be bigger than full backups and ' inex reorganize' or 'dbcc shrinks' can cause this.
--backup size in GB
select database_name,backup_size/1024/1024/1024,Case WHEN type='D' then 'FULL'
WHEN type='L' then 'Log'
When type='I' then 'Differential' End as [BackupType],backup_start_date,backup_finish_date, datediff(minute,backup_start_date,backup_finish_date) as [BackupTime]
from msdb.dbo.backupset where database_name='mydatabase' and type in ('D','I')
order by backup_set_id desc
Hope it Helps!!

Snapshots interfering with differential backups

1- Setup full backs to happen Saturday nights.
2- Setup differential backups to happen every night, execpt Saturdays
3- This is on a VM machine, and we take a snapshot of it every Wednesday night.
4- SQL Server records the snapshot as a valid, full backup, although it is marked as is_snapshot = 1.
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After research I found KB article 951288 (http://support.microsoft.com/kb/951288). Apparently this is a Microsoft issue.
So, how do we tell SQL server to ignore the snapshot backup when doing the differential backups? And no, we do not want to stop doing our snapshots on Wednesdays. Is there a solution or a work around to this?
This is really annoying and dangerous that SQL Server would consider these snapshots as valid, viable full backups on which to base its differential backups.
Help much appreciated,
Raphael
rferreira

Hi Raphael,
According to the following document, virtualization Snapshots for Hyper-V or for any virtualization vendor are not supported to use with SQL Server in a virtual machine. I want to confirm whether there is any other important application running on the VM
machine. If not, we can turn off VM Snapshot, if the VM machine failed, we just need to restore the database backup. For more detail information, please refer to the following link:
Support policy for Microsoft SQL Server products that are running in a hardware virtualization environment
http://support.microsoft.com/?id=956893
Allen Li
TechNet Community Support

How to restore a TM backup after HDD replacement?

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How to Restore Full Offiline Backup using BRTOOLS from a Tape

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BR0401I BRRESTORE 7.00 (32)
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BR0121E Processing of log file /oracle/DEV/sapbackup/bedflluv.fft failed
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4 - Database user/password (user) .... [/]
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7 - Scrolling line count (scroll) .... [20]
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Why cant I download apps after restoring from a backup? How to fix?

After I restored my ipod from a backup a month ago, my ipod wont let me download apps. It says "Unable to download app at this time". The thing is I can download when connected to my computer, and when new apps are downloaded on my other devices, they auto-download onto my ipod (Like they did before the restore from the backup) How can I download apps again without connectig to my computer or downloading them on other devices?

Have you tried when connect to another network?
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If you get an error that says can't backup, try moving the existing backup file to a safe location and thry again. again. You can find the location of the backup file here:
iPhone and iPod touch: About backups

Restoration of Differential Backup

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