Create a ACFS File System on Exadata X7-2 with 18c Grid

Planning to create 15TB ACFS mount for database backups on Exadata

We had x7-2 half rack setup with preinstalled 18c grid

Logged into ASM and checked disk group space details, around 60TB space allocated to DATAC1 disk group,will create 15TB ACFS from DATAC1

[oracle@dbm0dbadm01-vm01 ~]$asmcmd

ASMCMD> lsdg

State    Type    Rebal  Sector  Logical_Sector  Block       AU  Total_MB   Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name

MOUNTED  HIGH    N         512             512   4096  4194304  62914816  62523708          2621440        19967356              0             Y  DATAC1/

MOUNTED  NORMAL  N         512             512   4096  4194304  16760832  16757724           349184         8204270              0             N  RECOC1/

Create a Volume:

ASMCMD> volcreate -G DATAC1 -s 15360G  backup

Verify volume details:

ASMCMD> volinfo -G DATAC1 backup

Diskgroup Name: DATAC1

         Volume Name: BACKUP

         Volume Device: /dev/asm/backup-437

         State: ENABLED

         Size (MB): 15728640

         Resize Unit (MB): 512

         Redundancy: HIGH

         Stripe Columns: 8

         Stripe Width (K): 1024

         Usage:

         Mountpath:

ASMCMD> exit

Format create ACFS Volume:

as a grid owner run 

[oracle@dbm0dbadm01-vm01 ~]$ /sbin/mkfs -t acfs /dev/asm/backup-437

mkfs.acfs: version                   = 18.0.0.0.0

mkfs.acfs: on-disk version           = 46.0

mkfs.acfs: volume                    = /dev/asm/backup-437

mkfs.acfs: volume size               = 16492674416640  (  15.00 TB )

mkfs.acfs: Format complete.

Mount volume as /backup:

[root@dbm0dbadm01-vm01 ~]# /sbin/acfsutil registry -a /dev/asm/backup-437 /backup -u oracle

acfsutil registry: mount point /backup successfully added to Oracle Registry

Verify /backup mount from all cluster nodes:

It should be visible from all nodes

[oracle@dbm0dbadm01-vm01 ~]$ df -h /backup

Filesystem           Size  Used Avail Use% Mounted on

/dev/asm/backup-437   15T   31G   15T   1% /backup

[root@dbm0dbadm02-vm01 ~]# df -h /backup

Filesystem           Size  Used Avail Use% Mounted on

/dev/asm/backup-437   15T   31G   15T   1% /backup

Verify Cluster Resource status:

Newly created ACFS volume automatically added to cluster resources

#crsctl stat res -t

--------------------------------------------------------------------------------

Name           Target  State        Server                   State details        Local Resources

--------------------------------------------------------------------------------

ora.DATAC1.BACKUP.advm

               ONLINE  ONLINE       dbm0dbadm01-vm01         STABLE

               ONLINE  ONLINE       dbm0dbadm02-vm01         STABLE