Dirk Schmiedt (and others) wrote:
The description in the man page doesn't sound all _that_ strong:
| If no patterns are specified, the default is 3 using pattern 0x55 | on the first pass, 0xaa on the second, and 0x3c on the third.
The manpage and the Storage MG differ at ONTAP 6.5.1R1: The Storage Management Guide pdf says: 6 cycles with these three pattern are the default behaviour. The manpage of "disk" talks about just one single default cycle with those three different patttern which definitely would be not be enough.
b.t.w. The manpage (default = 1 cycle) is correct, the Storage Management Guide isn't. (ONTAP 6.5.1R1) => Use the max. value (-c 7) for disk sanitiation explicitely.
disk sanitize start 8a.18 disk sanitize start -c 1 8a.19 disk sanitize start -c 2 8a.20 disk sanitize start -c 4 8a.21 disk sanitize start -c 7 8a.22
disk sanitize status
sanitization for 8a.18 is 50 % complete sanitization for 8a.19 is 50 % complete sanitization for 8a.20 is 28 % complete sanitization for 8a.21 is 15 % complete sanitization for 8a.22 is 8 % complete