Oracle ASM new install - can't see ASM disks from asmca after running new install.Kfod does not discover the disks as per discovery path
But we can see the devices from operating system level.
Cause:
When reusing a LUN, ASM may detect a previous disk header and refuse to reuse the disk.
Solution:
Clear the header by writing 25 MB of null, after clearing the header ASMCA and KFOD can able to see the devices
For example:
# dd if=/dev/zero of=<Device path> bs=1M count=25
But we can see the devices from operating system level.
Cause:
When reusing a LUN, ASM may detect a previous disk header and refuse to reuse the disk.
Solution:
Clear the header by writing 25 MB of null, after clearing the header ASMCA and KFOD can able to see the devices
For example:
# dd if=/dev/zero of=<Device path> bs=1M count=25