I was hit with a situation this morning where during a system migration the ASM headers were overwritten/blanked out in AIX. this was done with a process that is used to provision new ASM Luns in our environment
In AIX you can use
we were stuck with such a situation with my database backup on the same disk and no metadata backup at all. ( Shame on me for not setting up these vital components early enough). This caused panic and chaos . A colleague googled thru and found references to kfed Here , Here and Here.