Oracle 11G - ORA-15196: invalid ASM block header


I am trying to start a ASM instance but Im getting the error below:

SQL> startup
ASM instance started

Total System Global Area  283930624 bytes
Fixed Size                  2227664 bytes
Variable Size             256537136 bytes
ASM Cache                  25165824 bytes
ORA-15032: not all alterations performed
ORA-15130: diskgroup "DATA_DG" is being dismounted
ORA-15066: offlining disk "DATA_DG_0000" in group "DATA_DG" may result in a
data loss
ORA-15196: invalid ASM block header [kfr.c:8514] [endian_kfbh] [3] [8101] [0 !=

If I try to mount it later on I get this:

SQL> alter diskgroup DATA01 mount;
alter diskgroup DATA01 mount
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15017: diskgroup "DATA01" cannot be mounted
ORA-15063: ASM discovered an insufficient number of disks for diskgroup

So, checking the alert log I found the following: (attached all lines)

ERROR: no read quorum in group: required 2, found 0 disks


The kfed read command does not return any error for the DATA01 (attached output)

Have already tried to following but did not work...

kfed write /dev/oracleasm/DATA01 text=/home/oracle/bak.bk
dd if=/dev/zero of=/dev/oracleasm/DATA01 bs=4096 count=1
kdep write /dev/oracleasm/DATA01 text=/home/oracle/bak.bk

And restart the ASM instance but it still fails...

Tried the kfed repair as well..


I think the issue might be related to the fact that I expanded a LVM volume where the data was...

To expand the LV I first created a new partition using fdisk (option n and set it as Linux LVM), then I created the physical volume (pvcreate), then used vgextend to add the new physical volume to the existing volume group.

Not sure if I supposed to do it this way....

Anyway, Is there a way out of this?

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slightwv (䄆 Netminder) Commented:
I would contact Oracle Support.

Attempting to continue to troubleshoot this yourself or through a site like this might cause more problems than they solve.

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joaotellesAuthor Commented:
Tks. Contacted the support
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