George Kahler wrote:
Does anyone know how you can zero out a specific disk(s) ? The "disk zero spares" command or "spares_zero" diagnostic command seem to zero out ALL spare disks only.
Hello George
If your focus is on pre-zeroing:
disk zero spares "only" zeros all non zeroed disks.
If you just want to zero one selected single disk start: vol add vol0 -n -d YOUR.DISK
He will check wether the disk is zeroed, and if not do so ... After zeroing, he will detect the '-n' option and therefore not add it to the volume. It will stay a spare disk. :-) This is very useful for older ONTAP releases who don't have the "disk zero spares" command.
If your focus is on data destruction:
If you really want to wipe the old data for data security reasons you should buy a "sanitation" license from NetApp to have a legally approved wipe out process. disk sanitize start ...
If you want to do it the "cheap" way: Fill and destroy the volume at least 5 (up to 10) times. Those data reconstruction services can tell by seeing if your "1" is hanging at 90,91 or 97.5% wether the history of this bit is 11011 or 01101 or 11001 or ... => To fill it use random data (by using the network clients as your random data source with a lot of network trafic :-( ). Using "hammer" inside the filer is definitely not safe enough. => Buy the sanitation license if you don't want to get killed by your colleges.
Smile & regards Dirk