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 Checking a Backup 

Use

You check that the backup is consistent and complete. This command is executed independently of the current database instance functions but can adversely impact database instance performance temporarily.

Prerequisites

You have the DBM operator authorization Backup.

You have opened a service session.

Syntax

recover_check <medium> <type> [ExternalBackupID <external_backup_ID>] [<nnn>] [UNTIL <date> <time>]

<medium>

Name of the backup medium; this must be defined beforehand (Defining or Changing a Backup Medium)

<type>

Type of Backup: DATA (Complete data backup), PAGES (Incremental data backup) or LOG (Log Backup)

Options

ExternalBackupID <external_backup_ID>

To check a backup created with an external backup tool, enter a backup ID name that the external tool will recognize.

<nnn>

Actual backup version on the backup media that is being checked; relevant only for media of type FILE

UNTIL <date> <time>

For log backups you can enter an exact time up to which the log backups are to be checked.

The backup specified is just checked, not restored.

Reply

OK<NL>
Returncode              <value><NL>
Date                    [<value>]<NL>
Time                    [<value>]<NL>
Server                  [<value>]<NL>
Database                [<value>]<NL>
Kernel Version          [<value>]<NL>
Pages Transferred       [<value>]<NL>
Pages Left              [<value>]<NL>
Volume Count            [<value>]<NL>
Mediumname              [<value>]<NL>
Location                [<value>]<NL>
Errortext               [<value>]<NL>
Label                   [<value>]<NL>
Is Consistent           [<value>]<NL>
First LOG Page          [<value>]<NL>
Last LOG Page           [<value>]<NL>
DB Stamp 1 Date         [<value>]<NL>
DB Stamp 1 Time         [<value>]<NL>
DB Stamp 2 Date         [<value>]<NL>
DB Stamp 2 Time         [<value>]<NL>
Page Count              [<value>]<NL>
Devices Used            [<value>]<NL>
Database ID             [<value>]<NL>
Max Used Data Page      [<value>]<NL>

Values for the Individual Fields of the Reply

Date

Date

Time

Time

Server

Name of the database server

Database

Name of the database instance

Kernel Version

Database kernel version

Pages Transferred

Number of pages transferred

Pages Left

Number of pages still to be transferred

Volumes

Number of backup media used

Medianame

Name of the backup medium

Location

File or device name

Errortext

Error message text

Label

Backup ID

Is Consistent

For data backup only: backup is internally consistent

First LOG Page

For data backup: first page of log backup to be read

For log backup: first page saved in log

Last LOG Page

For log backup only: last page saved in log

DB Stamp 1 Date
DB Stamp 1 Time

Time stamp for first page of log backup

DB Stamp 2 Date
DB Stamp 2 Time

Time stamp for last page of log backup

Page Count

Total number of pages saved

Devices Used

Number of backup devices used

Database ID

Database ID used to identify data and log backups that belong together

Max Used Data Page

Maximum page number (indication of minimum database size when backup is imported)

Reply in the Event of an Error

If an error occurs during the process, you will receive a reply in the following format:

ERR<NL>
<errcode>, <err_description><NL>
[<extended_description><NL>]

<errcode>

Error message number

See also: Messages

<err_description>

Description of the error

<extended_description>

Cause of the error

 

The following errors may occur:

<errcode>

<err_description>

Explanation

-24927

ERR_TOOLCHK: the external backup tool was not found

The external backup tool could not be found or has been installed incorrectly.

-24926

ERR_MEDIUMCHK: the medium cannot be used with an external backup tool

The medium specified cannot be used with the backup tool the medium name refers to (Defining and Changing a Backup Medium).

-24925

ERR_PREPARE: prepare of the backup operation failed

The preparations necessary to use the backup tool were not made correctly.

-24924

ERR_DBREQ: cannot start database kernel request

The database instance was unable to start the check.

-24923

ERR_TOOLREQ: cannot start external backup tool correctly

The backup tool could not be started correctly.

-24922

ERR_OPCHK: cannot check state of backup operation

Unable to check the status of the database instance or the backup tool.

-24921

ERR_POSTOP: cannot finish backup operation correctly

Although the backup was successful, the post-processing steps required could not be performed.

-24920

ERR_BACKUPOP: backup operation was unsuccessful

The check failed due to a problem with the database or the backup tool.

-24919

ERR_CLEANUP: cannot clean up correctly after backup operation

Although the check was successful, the temporary system resources that were used could not be freed up again.

 

 

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