tag:blogger.com,1999:blog-4270346497183643494.post2937322895523763613..comments2024-03-15T05:03:09.921-07:00Comments on Cosonok's IT Blog: Disk Sanitization Time?Unknownnoreply@blogger.comBlogger3125tag:blogger.com,1999:blog-4270346497183643494.post-55576190466735752912021-11-22T23:05:33.335-08:002021-11-22T23:05:33.335-08:00In ONTAP 9.6 you can do sanitize in maintenance mo...In ONTAP 9.6 you can do sanitize in maintenance mode.<br />https://docs.netapp.com/us-en/ontap/disks-aggregates/sanitize-disk-maintenance-mode-task.html<br /><br />The thing with SSDs is that not all SSDs support disk sanitize:<br />https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/Data_ONTAP_%22disk_sanitize%22_feature_has_certain_limitations_with_SSDCarsonokhttps://www.blogger.com/profile/05717017593953701040noreply@blogger.comtag:blogger.com,1999:blog-4270346497183643494.post-62558198459118899092019-03-26T10:12:07.056-07:002019-03-26T10:12:07.056-07:00I can't seem to find it documented anywhere wi...I can't seem to find it documented anywhere within NetApp docs but by chance do you know what ontap commands are affected once you enable "options licensed_feature.disk_sanitization.enable on" for each node in the cluster?<br /><br />I have 96 3.5TB SSD and 96 3.7TB NL-SAS drives to completely sanitize in my customer's cluster. Any idea what kind of time this would take?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4270346497183643494.post-30717246873400502872019-01-24T05:55:55.464-08:002019-01-24T05:55:55.464-08:00Indeed, there is not much info on Disk Sanitizatio...Indeed, there is not much info on Disk Sanitization. I have done this several times in the 7-mode era, and I have made the following notes for myself:<br /><br />- Disks to be sanitized must not be a part of an aggregate. That means they must be spare disks. Spare disks do not have to be zeroed up front. This also means, that if you want to sanitize the disks with vol0 (on aggr0) you will need 2 passes: the first pass is to sanitize all disks except aggr0, the second pass is to create a new aggregate of 3 disks and move vol0 there, then sanitize the original aggr0 disks. Or move the aggr0 disks to another system and sanitize them there.<br />- After sanitization, you can release the disks using "disk sanitize release 0c.00.x"<br />- After releasing sanitized disks, the disks are also unassigned from the controller. To use them again, use "disk assign 0c.00.x".<br />- After assigning sanitized disks, ONTAP will mark those disks as broken, because sanitization also removes the disk label.<br />- To make those disks usable again, you can unfail the disks and make them spare with the command "disk unfail -s 0c.00.x" in priv set advanced.<br />- After unfailing the disks, you will have non-zeroed spare disks (because sanitization writes a random pattern to the disks a number of times). So to zero them again, you can use "disk zero spares".Anonymoushttps://www.blogger.com/profile/07599556116607383988noreply@blogger.com