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Ultimate Linux Command Cheat Sheet
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For some reasons you need to reuse the ASM disks on your Linux Centos or Redhat Server, but the disk headers persisting. The only easy way to make this possible is to clear the headers with bellow commands
Am using Redhat7.4 with Oracle Entreprise 12.2c
How to clear ASM disk Headers ?
1-Show ASM disks
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Ultimate Linux Command Cheat Sheet
Taskset Cheatsheet | Pandoc Cheatsheet | Curl Cheatsheet | Grep CheatSheet | Cron CheatSheet | Grep CheatSheet | More!
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#ls -alt /dev/asm/ total 0 lrwxrwxrwx 1 root root 8 May 3 11:11 fra01 -> ../dm-16 lrwxrwxrwx 1 root root 8 May 3 11:11 oradata01 -> ../dm-18
2-Clear the Disks Headers
# dd if=/dev/zero of=/dev/asm/fra01 bs=8192 count=12800 12800+0 records in 12800+0 records out 104857600 bytes (105 MB) copied, 0.136025 s, 771 MB/s
and
# dd if=/dev/zero of=/dev/asm/oradata01 bs=8192 count=12800 12800+0 records in 12800+0 records out 104857600 bytes (105 MB) copied, 0.141869 s, 739 MB/s
3-Reload Udev rules without rebooting
udevadm control --reload-rules && udevadm trigger
Enjoy