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Don Burleson Blog 







Reset an ASM diskgroup

Oracle Database Tips by Donald BurlesonAugust 13, 2015


Question: I had some troubles with my Oracle install, so I deleted Oracle and start over again the installation process. Now I need to recreate an ASM group, but when I want to select the disk, it appears that it is already a member of the ASM group. Does anyone know how to change the disk status to candidate disk? I erased the ASM diskgroup in the first installation, but in this second installation. My problem is that the disk I want to add has status of member, but I no longer have any ASM.
Answer: It seems that ASM put a label in the disks, and it needs to set it free, the command is
dd if=/dev/zero of=/dev/rhdisk2 bs=1024 count=100
where rhdisk2 is the name of the disk.



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