ORA-15477: cannot communicate with the volume driver (dbd error: ocistmtexecute)

Hi,

Sometimes You can get ”  ORA-15477: cannot communicate with the volume driver (dbd error: ocistmtexecute) ” error.

 

Details of error are as follows.

ORA-15477: cannot communicate with the volume driver

SQL> ALTER DISKGROUP DATA set attribute 'compatible.advm'='11.2.0.0';
ALTER DISKGROUP DATA set attribute 'compatible.advm'='11.2.0.0'
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15242: could not set attribute compatible.advm
ORA-15238: 11.2.0.0 is not a valid value for attribute compatible.advm
ORA-15477: cannot communicate with the volume driver

 

 

 

Since the directory structure is missing for /dev/asm/* you may get errors like below

 

SQL> ALTER DISKGROUP DATA set attribute 'compatible.advm'='11.2.0.0';
ALTER DISKGROUP DATA set attribute 'compatible.advm'='11.2.0.0'
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15242: could not set attribute compatible.advm
ORA-15238: 11.2.0.0 is not a valid value for attribute compatible.advm
ORA-15477: cannot communicate with the volume driver

 

 

Please  reinstall the acfs drivers by following the How To Install/Reinstall Or Deinstall ACFS Modules/Installation Manually? (Doc ID 1371067.1)

Post install verify if the directory structure exsts and then try again

 

ls -latr /dev/asm/
total 0
brwxrwx--- 1 root asmadmin 252, 0 Mar 19 14:22 .asm_ctl_spec
brwxrwx--- 1 root asmadmin 252, 2 Mar 19 14:22 .asm_ctl_vmb
brwxrwx--- 1 root asmadmin 252, 1 Mar 19 14:22 .asm_ctl_vdbg
brwxrwx--- 1 root asmadmin 252, 10 Mar 19 14:22 .asm_ctl_vbg0
brwxrwx--- 1 root asmadmin 252, 11 Mar 19 14:22 .asm_ctl_vbg1
brwxrwx--- 1 root asmadmin 252, 12 Mar 19 14:22 .asm_ctl_vbg2
brwxrwx--- 1 root asmadmin 252, 13 Mar 19 14:22 .asm_ctl_vbg3
brwxrwx--- 1 root asmadmin 252, 14 Mar 19 14:22 .asm_ctl_vbg4
brwxrwx--- 1 root asmadmin 252, 15 Mar 19 14:22 .asm_ctl_vbg5
brwxrwx--- 1 root asmadmin 252, 16 Mar 19 14:22 .asm_ctl_vbg6
brwxrwx--- 1 root asmadmin 252, 17 Mar 19 14:22 .asm_ctl_vbg7
brwxrwx--- 1 root asmadmin 252, 18 Mar 19 14:22 .asm_ctl_vbg8
drwxrwx--- 2 root asmadmin 280 Mar 19 14:22 .
drwxr-xr-x 13 root root 4200 Mar 19 14:22 ..

SQL> ALTER DISKGROUP DATA set attribute 'compatible.advm'='11.2.0.0';

OR

 

Add “umask 022” in GI_Home/root.sh at the time of installation.

 

 

 

 

Do you want to learn more details about Data Redaction in Oracle Database , read the following post.

What is the Oracle ASM Cluster Filesystem (ACFS) and How to Create ACFS

 

 

 

Do you want to learn more details about RMAN, then read the following articles.

https://ittutorial.org/rman-backup-restore-and-recovery-tutorials-for-beginners-in-the-oracle-database/