Fast Way to Erase All Data on RAID Disk
If we got a 500G hard disk, which belonged to RAID 5 previously, we can reset it quickly, by input an 100M null file to MBR. Note, this way is really fast and dirty.
dd if=/dev/zero of=/dev/sdb bs=1024 count=102400
Then, we got the brand new 500G hard disk.
