Creates an Oracle ACFS file system.

Syntax and Description

acfsformat /h
acfsformat [/v] [/f] [/n name] volume_device [blocks]

Table 16-20 contains the options available with the acfsformat command.

Table 16-20 Options for the acfsformat command

Option Description


Specifies verbose mode. The progress is displayed as the operation occurs.

/n name

Specifies the name for the file system. This is also known as a volume label. acfsutil info fs returns the name if one was specified. This can also be displayed from the VOL_LABEL column in the V$ASM_ACFSVOLUMES view.


Specifies the force option. This action creates the file system even if there is an existing Oracle ACFS on the device, although only if the file system is dismounted. This option overwrites structures on the original file system. Use this option with caution.


Displays the usage help text.


Specifies the number of blocks that the file system should consume on the named device. The quantity specified can be in units of K (kilobytes), M (megabytes), G (gigabytes), or T (terabytes). If a unit is not specified, the default is bytes. If this option is not specified, the entire device is consumed.


Specifies an Oracle ADVM device file to be formatted.

acfsformat creates the on disk structure needed for Oracle ACFS to be mounted. acfsformat performs a quick format on the target volume. After acfsformat runs successfully, the USAGE column in the V$ASM_VOLUME view displays ACFS.

The minimum file system size is 200 MB.

The Oracle ACFS driver must be loaded for acfsformat to work.

Windows Administrator privileges are required to run this command.


This example shows how to create an Oracle ACFS file system. The verbose option is specified in this example.

Example 16-15 Using the acfsformat command

C:\> acfsformat /v asm-volume1-311