Creating an Oracle ACFS File System 12c

Create a volume

RECO is the Disk Group name.

ASMCMD [+] > volcreate -G RECO -s 200G u02


Check the volume device name 

ASMCMD [+] > volinfo -G RECO u02
Diskgroup Name: RECO

         Volume Name: U02
         Volume Device: /dev/asm/u02-93
         State: ENABLED
         Size (MB): 204800
         Resize Unit (MB): 64
         Redundancy: HIGH
         Stripe Columns: 8
         Stripe Width (K): 1024
         Usage:
         Mountpath:

or

SELECT volume_name, volume_device FROM V$ASM_VOLUME WHERE volume_name ='U02';

Create a file system with the Oracle ACFS mkfs command. Create a file system using an existing volume device.


[grid@RAC1 ~]$ /sbin/mkfs -t acfs /dev/asm/u02-93
mkfs.acfs: version                   = 12.1.0.2.0
mkfs.acfs: on-disk version           = 39.0
mkfs.acfs: volume                    = /dev/asm/u02-93
mkfs.acfs: volume size               = 214748364800  ( 200.00 GB )
mkfs.acfs: Format complete.

Optionally register the file system as a root user

[grid@RAC1 ~]$ /sbin/acfsutil registry -a /dev/asm/u02-93 /u02
PRCN-2018 : Current user grid is not a privileged user
acfsutil registry: ACFS-03111: unable to add ACFS mount /u02 within Oracle Registry

[grid@RAC1 ~]$ sudo su - root
[sudo] password for grid:
[root@RAC1 ~]# /sbin/acfsutil registry -a /dev/asm/u02-93 /u02
acfsutil registry: mount point /u02 successfully added to Oracle Registry



[root@RAC1 ~]# df -h /u02
Filesystem       Size  Used Avail Use% Mounted on
/dev/asm/u02-93  200G  483M  200G   1% /u02
[root@RAC1 ~]#

Check status
ASMCMD> volinfo -G RECO u02
Diskgroup Name: RECO

         Volume Name: U02
         Volume Device: /dev/asm/u02-93
         State: ENABLED
         Size (MB): 204800
         Resize Unit (MB): 64
         Redundancy: HIGH
         Stripe Columns: 8
         Stripe Width (K): 1024
         Usage: ACFS
         Mountpath: /u02

Mount the file system with the Oracle ACFS mount command. You can mount a file system before or after registering the file system. If the file system has been registered, you can wait for the file system to be mounted automatically. Issue the following command on each node to mount it if not mounted already.

/bin/mount -t acfs /dev/asm/u02-93 /u02



https://docs.oracle.com/database/121/OSTMG/GUID-4C98CF06-8CCC-45F1-9316-C40FB3EFF268.htm#OSTMG94787