Shuts down the database and drops it from the Adaptive Server. The devices are also deactivated and dropped. The database and its pages are not altered when they are unmounted. The database pages remain on the OS devices. Once the unmount command completes, you can disconnect and move the devices at the source Adaptive Server if necessary. Use the manifest_file extension to create the manifest file for use at the secondary Adaptive Server.

The unmount command limits the number of databases to eight in a single command.

WARNING! The unmount command removes a database and all its information from the Adaptive Server. Use the unmount command only when you want to remove the database from one Adaptive Server to another Adaptive Server.


unmount database dbname_list to manifest_file



the database being unmounted. You can unmount more than one database.


the binary file that describes the databases that are present on a set of database devices. It can be created only if the set of databases that occupy those devices are isolated and self-contained on those devices.

Since the manifest file is a binary file, operations that perform character translations of the file contents (such as ftp) will corrupt the file unless done in binary mode.


Example 1

unmount databases from an Adaptive Server and create the manifest file for the database:

unmount database pubs2 to "/work2/Devices/Mpubs2_file"

Example 2

The encryption key created in key_db has been used to encrypt columns in col_db. These commands successfully unmount the named databases:

unmount database key_db, col_db
unmount database key_db with override
unmount database col_db with override 


You cannot:

Cluster Edition

mount database and unmount database are supported in the Cluster Edition. If an instance fails while one of these commands is in progress, the command may abort. In this case, the user must re-issue mount database or unmount database when the instance failover recovery is complete.

Encrypted columns and unmount database

These commands will fail with an error message without the override:

unmount database key_db
unmount database col_db


ANSI SQL – Compliance level: Entry-level compliant.


Values in event and extrainfo columns of sysaudits are:


Audit option

Command or access audited

Information in extrainfo



unmount database

  • Roles – current active roles

  • Keywords or options – NULL

  • Previous value – NULL

  • Current value – NULL

  • Other information – NULL

  • Proxy information – original login name, if a set proxy is in effect

See also

Commands mount, quiesce database