Restore using backup device

We currently have a nightly full backup of a user database (call it UserDB) going to a backup device, call it Device_A. Every 2 hours we perform a transaction log backup to the same device, Device_A. To simplify, lets say the backup device file is called
device_a.bak.
Our backup commands are:
BACKUP DATABASE userdb TO device_a WITH NOINIT , NOUNLOAD , NAME = N'userdb backup', NOSKIP , STATS = 10, NOFORMAT
BACKUP LOG userdb TO device_a WITH NOINIT , NOUNLOAD , NAME = N'userdb transaction log', NOSKIP , STATS = 10, NOFORMAT
What would be the restore syntax to get it back to a point in time if there were a failure, and at the time of the failure we had the full database backup, followed by two transaction log backups?
Would it be something like this:
1. Restore database userdb from disk = 'e:\backup\device_a.bak' with replace, norecovery
2. Restore log userdb from disk = 'e:\backup\device_a.bak'
It seems, if there are multiple transaction logs to apply, that this would not work to restore to a point in time. How would it be done?
Message posted via http://www.sqlmonster.com
since you do both full bk and log bk with NOINIT, SQL with keep adding new
backup sets into the backup device. Do a RESTORE FILELISTONLY to find out
the full bk set of the day you want to start with. Once you got it let's
say it = x you will run this:
restore database userdb from disk = 'e:\backup\device_a.bak' with replace,
file = x, standby= @.undo_userdb.bak
restore log userdb from disk = 'e:\backup\device_a.bak' with file = x + 1,
standby= @.undo_userdb.bak
I think you can pickup from here. Read "How to restore to a point in time"
in BOL for more details.
hth,
"Robert Richards via SQLMonster.com" <forum@.SQLMonster.com> wrote in message
news:77008f35de2d430f818697e0a4d2a00d@.SQLMonster.c om...
> We currently have a nightly full backup of a user database (call it
> UserDB) going to a backup device, call it Device_A. Every 2 hours we
> perform a transaction log backup to the same device, Device_A. To
> simplify, lets say the backup device file is called device_a.bak.
> Our backup commands are:
> BACKUP DATABASE userdb TO device_a WITH NOINIT , NOUNLOAD , NAME =
> N'userdb backup', NOSKIP , STATS = 10, NOFORMAT
> BACKUP LOG userdb TO device_a WITH NOINIT , NOUNLOAD , NAME = N'userdb
> transaction log', NOSKIP , STATS = 10, NOFORMAT
> What would be the restore syntax to get it back to a point in time if
> there were a failure, and at the time of the failure we had the full
> database backup, followed by two transaction log backups?
> Would it be something like this:
> 1. Restore database userdb from disk = 'e:\backup\device_a.bak' with
> replace, norecovery
> 2. Restore log userdb from disk = 'e:\backup\device_a.bak'
> It seems, if there are multiple transaction logs to apply, that this would
> not work to restore to a point in time. How would it be done?
> --
> Message posted via http://www.sqlmonster.com
|||Thanks, that is what I was looking for.
I need further clarification that BOL did not provide, or else I am too boneheaded to understand.
Since I am adding new backup sets to the same backup device the RESTORE FILELISTONLY seems to lack the full information I need to identify the the files (the filenumber needed in the RESTORE DATABASE and RESTORE LOG statements) needed to restore to a poin
t in time. It seems like I need to also utilize the RESTORE HEADERONLY also, but that still does not give me the filenumber. How can I retrieve the specific filenumbers needed to encompass my most recent full backup and the subsequent log backups? I must
be missing something and cannot see or understand it.
Message posted via http://www.sqlmonster.com
|||> It seems like I need to also utilize the RESTORE HEADERONLY also, but that
> still does not give me the filenumber.
The Position column of the RESTORE HEADERONLY results is the file number of
the backup. This is the value you need to specify as the FILE parameter in
your restore commands.
Hope this helps.
Dan Guzman
SQL Server MVP
"Robert Richards via SQLMonster.com" <forum@.SQLMonster.com> wrote in message
news:95c034fd30aa48d1a13d01d1b50fade2@.SQLMonster.c om...
> Thanks, that is what I was looking for.
> I need further clarification that BOL did not provide, or else I am too
> boneheaded to understand.
> Since I am adding new backup sets to the same backup device the RESTORE
> FILELISTONLY seems to lack the full information I need to identify the the
> files (the filenumber needed in the RESTORE DATABASE and RESTORE LOG
> statements) needed to restore to a point in time. It seems like I need to
> also utilize the RESTORE HEADERONLY also, but that still does not give me
> the filenumber. How can I retrieve the specific filenumbers needed to
> encompass my most recent full backup and the subsequent log backups? I
> must be missing something and cannot see or understand it.
> --
> Message posted via http://www.sqlmonster.com
|||I didn't double check when I wrote RESTORE FILELISTONLY. I just remmember
it is either one to get the file number. It should be in RESTORE HEADERONLY
as Dan pointed out.
"Robert Richards via SQLMonster.com" <forum@.SQLMonster.com> wrote in message
news:95c034fd30aa48d1a13d01d1b50fade2@.SQLMonster.c om...
> Thanks, that is what I was looking for.
> I need further clarification that BOL did not provide, or else I am too
> boneheaded to understand.
> Since I am adding new backup sets to the same backup device the RESTORE
> FILELISTONLY seems to lack the full information I need to identify the the
> files (the filenumber needed in the RESTORE DATABASE and RESTORE LOG
> statements) needed to restore to a point in time. It seems like I need to
> also utilize the RESTORE HEADERONLY also, but that still does not give me
> the filenumber. How can I retrieve the specific filenumbers needed to
> encompass my most recent full backup and the subsequent log backups? I
> must be missing something and cannot see or understand it.
> --
> Message posted via http://www.sqlmonster.com