Hi Tom,
when I try to add two new disk , once for failgroup , I receive this error:

ALTER DISKGROUP OCR ADD 
FAILGROUP FGA disk '/dev/oracleasm/disks/pippo_OCR1_A_alfa' NAME pippo_OCR1_A_alfa
FAILGROUP FGH disk '/dev/oracleasm/disks/pippo_OCR1_H_alfa' NAME pippo_OCR1_H_alfa
REBALANCE POWER 8;

*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-59700: Failgroup FGH already belongs to site cedh
ORA-59700: Failgroup FGA already belongs to site ceda

But if I query the view v$asm_disk I found that the name of failgroups are:

Disk Group Name      Path                                       File Name                   Fail Group   FAILGROUP_LABEL  SITE_LABEL                   
-------------------- ------------------------------------------ -------------------------- -----------  ----------------  ------------
OCR                  /dev/oracleasm/disks/CEDA_OCR1             OCR_0000                     FGA                                                                      
                     /dev/oracleasm/disks/CEDA_OCR2             OCR_0001                     FGA                                                                      
                     /dev/oracleasm/disks/CEDH_OCR1             OCR_0002                     FGH                                                                      
                     /dev/oracleasm/disks/CEDH_OCR2             OCR_0003                     FGH                                                                      
                     /voting_disk/asm-nfs-ocrvote03             OCR_0004                     FGQ                                                                      
********************                                                                                                                                                
Disk Group                                                                                                                                                          

[CANDIDATE]          /dev/oracleasm/disks/pippo_OCR1_A_alfa                                                                                                           
                     /dev/oracleasm/disks/pippo_OCR1_H_alfa   

If I change the statements , exchange FGA -> CCEDA and FGH -> CEDH , I've ora-00600 error:
ALTER DISKGROUP OCRVOTE
ADD
FAILGROUP CEDA disk '/dev/oracleasm/disks/RPU_HTH_DB_OCR1_A_UNITY' NAME RPU_HTH_DB_OCR1_A_UNITY
FAILGROUP CEDH disk '/dev/oracleasm/disks/RPU_HTH_DB_OCR1_H_UNITY' NAME RPU_HTH_DB_OCR1_H_UNITY
REBALANCE POWER 8;

# ALTER DISKGROUP OCRVOTE
# *
# ERROR at line 1:
# ORA-00600: internal error code, arguments: [kfgSiteNumPopulate02], [], [], [], [], [], [], [], [], [], [], []


Do you have any suggestions?

Thans a lot,
Andrea