User guide

The metadata will be the most detailed and the backup will take the longest time to complete.

Individual e-mails and other items within mailboxes and public folders can be accessed without

opening a database.

3.6.14.9 multi_volume_snapshot

--multi_volume_snapshot={true|false}

This parameter is effective only for Windows operating systems.

This parameter is used with the backup disk (p. 19) command. This parameter is also used with the

backup file (p. 24) command when the --snapshot (p. 97) parameter is specified.

The parameter determines whether to take snapshots of multiple volumes at the same time or one

by one.

If the value is true or if the parameter is not specified, snapshots of all volumes being backed up will

be created simultaneously. Use this parameter to create a time-consistent backup of data spanned

across multiple volumes, for instance for an Oracle database.

If the parameter value is false, the volumes' snapshots will be taken one after the other. As a result,

if the data spans across several volumes, the resulting backup may be not consistent.

3.6.14.10 Pre and post commands

pre_cmd

--pre_cmd=<command>

Pre data capture command. The parameter value should be the path to a batch file containing the

required command along with its parameters.

Use this parameter to suspend operation of a database or application for a short period of time in

order to take a snapshot of the data being backed up. While suspending the database, all running

transactions are completed to prevent loss of data consistency. If this parameter is specified, you

must specify the --post_cmd parameter.

Example:

--pre_cmd=c:\temp\pre_cmd.bat

where the contents of the batch file is

"net stop MSSQLSERVER"

post_cmd

--post_cmd=<command>

Post data capture command. The parameter value should be the path to a batch file containing the

required command along with its parameters.

Use this parameter to resume operation of the database or application after the data capture is

complete.

Example:

--post_cmd=c:\temp\post_cmd.bat