Disk sanitization enables you to remove data from a disk or set of disks so that the data can never be recovered.
When disk sanitization is enabled, it disables some Data ONTAP commands, including volume move (unless SnapMirror is also enabled). Once disk sanitization is enabled on a storage system, it cannot be disabled.
If you need to remove data from disks using Storage Encryption, do not use this procedure. Use the procedure for destroying data on disks using Storage Encryption.
If you need to abort the sanitization process, you can do so by using the disk sanitize abort command. If the specified disks are undergoing the formatting phase of sanitization, the abort does not occur until the phase is complete. At that time, Data ONTAP displays a message telling you that the sanitization process was stopped.
-p pattern1 -p pattern2 -p pattern3 specifies a cycle of one to three user-defined hex byte overwrite patterns that can be applied in succession to the disks being sanitized. The default pattern is three passes, using 0x55 for the first pass, 0xaa for the second pass, and 0x3c for the third pass.
-r replaces a patterned overwrite with a random overwrite for any or all of the passes.
-c cycle_count specifies the number of times that the specified overwrite patterns are applied. The default value is one cycle. The maximum value is seven cycles.
disk_list specifies a space-separated list of the IDs of the spare disks to be sanitized.
|All of the sanitized disks are listed as spares||You are done. The disks are sanitized and in spare status.|
|Some of the sanitized disks are not listed as spares||Complete the following steps:
The specified disks are sanitized and designated as hot spares. The serial numbers of the sanitized disks are written to /etc/log/sanitized_disks.
The following command applies the default three disk sanitization overwrite patterns for one cycle (for a total of three overwrites) to the specified disks 8a.6, 8a.7, and 8a.8:disk sanitize start 8a.6 8a.7 8a.8
The following command would result in three disk sanitization overwrite patterns for six cycles (for a total of 18 overwrites) to the specified disks:disk sanitize start -c 6 8a.6 8a.7 8a.8