User guide

3.6.14.14 use_vss

--use_vss={auto|software_auto|acronis|native|software|hardware|none}

Volume Shadow Copy Service (VSS) notifies VSS-aware applications that the backup is about to start.

This ensures the consistent state of all data being used by such applications. Then, VSS tells a

snapshot provider to create the snapshot. You can select the snapshot provider that VSS will use for

taking snapshots.

Available values of the parameter are as follows:

 auto (by default)

VSS will use the hardware-based provider that supports the source volume. If none is found, VSS

will use the Microsoft Software Shadow Copy provider.

 software_auto

In most cases, VSS will use the Microsoft Software Shadow Copy provider.

 acronis

VSS will use Acronis VSS Provider for taking snapshots.

 native

VSS will use the system provider (Microsoft Software Shadow Copy provider) for taking

snapshots.

 software

VSS will use any available software-based provider that supports the source volume.

 hardware

VSS will use the hardware-based provider that supports the source volume. If no hardware-based

provider is found, snapshots will be created by means of Acronis Backup & Recovery 11.5.

 none

Choose this value if your database is incompatible with VSS. Snapshots will be created by means

of Acronis Backup & Recovery 11.5. Snapshots are taken faster but data consistency of the

applications whose transactions are not completed cannot be guaranteed.

3.6.14.15 vss_full_backup

--vss_full_backup

This parameter is used with the backup disk (p. 19) command unless the --use_vss (p. 98)

parameter value is acronis or none.

If the parameter is specified, logs of Microsoft Exchange Server and of other VSS-aware applications

(except for Microsoft SQL Server) will be truncated after each successful full, incremental or

differential backup.

Do not specify this parameter in the following cases:

 If you use Acronis Backup & Recovery 11.5 Agent for Microsoft Exchange Server or third-party

software for backing up the Exchange Server data. This is because the log truncation will

interfere with the consecutive transaction log backups.

 If you use third-party software for backing up the SQL Server data. The reason is that the

third-party software will take the resulting disk-level backup for its "own" full backup. As a result,