Hello Netapp Community,
We have a Netapp 8200 HA running Cluster mode 9.1P6. It has the following disks:
1 Stack of 2xDS2246 200GB 6GB SSD Drives
1 Stack of 8xDS2246 900GB 6GB SAS Drives
1 Stack of 2xDS224C 900GB 12GB SAS Drives
1 Stack of 3xDS4486 4TB 6GB SAS Drives
1 Stack of 3xDS4246 600GB 15K SAS Drives
The problem I am running into is the 900GB Shelfs. The netapp does not differentiate between the 12GB and 6GB 900GB drives. It will let you add a 6GB drive into a 12GB aggregate.
1 Stack of 2xDS224C 900GB 12GB SAS Drives
Controller 1 and 2 have their root volumes on these drives.
1 Aggregate with Flash Pool enabled using the rest of the 12GB drives.
2 Spares on each controller.
Controller 2 owns the 1 Stack of 8xDS2246 900GB 6GB SAS Drives. What I would like to do is spread out the 900gb drives across the 2 controllers to spread out the load. Right now most of the load is on controller 2. I made a ticket with Netapp and they said it shouldnt really be a big deal but here are my concerns.
1. Lets say a 12GB 900GB drive fails. The Netapp may just grab a 6GB SAS drive and replace it. Or if a 6GBSAS 900GB drive fails it may replace it with a 12GB SAS drive. I am just not sure I am overthinking it or what.
Thoughts? In the past when you mixed 6GB and 3GB sas drives they stepped down to 3GB. I am just wondering if I am going to notice any performance degregation if a 6GB and 12GB SAS drive gets mixed. I will create aggregates with the same drive type, but I cannot control what the netapp does when a drive fails. I enabled all these options in the Netapp:
HSC-NETAPP-0-01
raid.mix.hdd.disktype.capacity off only_one
HSC-NETAPP-0-01
raid.mix.hdd.disktype.performance off only_one
HSC-NETAPP-0-01
raid.mix.hdd.rpm.capacity off only_one
HSC-NETAPP-0-01
raid.mix.hdd.rpm.performance off only_one
HSC-NETAPP-0-01
Thanks.