ONTAP Hardware
ONTAP Hardware
Hi All,
I am installing a new NetApp FAS8300 system equipped with an DS212 shelf (12 x 12TB NL-SAS disks) and DS224 shelf (10 x 3.8TB SSDs). My question is how to connect these two disk shelves to the controller: should they be daisy-chained in a single stack, or do they require separate stacks/loops? If daisy-chaining is supported, which shelf should be positioned first (closest to the controller)? Additionally, I plan to use the DS212 shelf for the root aggregate disks.
Ordered mini-SAS HD SAS optical cables for both shelves.
Your help and inputs will be very valuable.
Thanks and regards.
Praveen.
Solved! See The Solution
Separating your HDD and SSD shelves in different stack is a performance best practice.
That said, with only 2 shelves at play, placing them in the same stack has not significant performance impact. Each controller will have a direct SAS link to each shelf, if you properly cable the stack as multipath-HA (MP-HA). The docs show this configuration.
That said, since the FAS8300 has 4 onboard SAS ports, why not future-proof your SAS storage for any future expansion? Use 2 ports for the DS212C and the other 2 ports for the DS224C. If you need to add either HDD or SSD shelves, you can just hot-add them to the appropriate stack.
Hi Praveen,
You shouldn't mix on the same stack SSD and NL-SAS, so i recommend two stacks. Take a look to the install guide from netapp site:
https://docs.netapp.com/us-en/ontap-systems/sas3/install-cabling-rules.html
Kind regards,
Albert
Hi Alber,
Thank a lot for replying.
As per this document the only condition is IOM, IOM12 & IOM12B can be added in same stack.
https://docs.netapp.com/us-en/ontap-systems/sas3/install-hot-add-shelf.html#install_disk_shelves_for_a_hot_add
You can hot-add one or more disk shelves with IOM12/IOM12B modules to an existing stack of disk shelves with IOM12/IOM12B modules or hot-add a stack of one or more disk shelves with IOM12/IOM12B modules directly to a SAS HBA or an onboard SAS port on the controller.
So in my case both DS212C and DS224C may comes with IOM12 or IOM12B.
Please help me understand this.
Thanks & Regards,
Praveen.
Separating your HDD and SSD shelves in different stack is a performance best practice.
That said, with only 2 shelves at play, placing them in the same stack has not significant performance impact. Each controller will have a direct SAS link to each shelf, if you properly cable the stack as multipath-HA (MP-HA). The docs show this configuration.
That said, since the FAS8300 has 4 onboard SAS ports, why not future-proof your SAS storage for any future expansion? Use 2 ports for the DS212C and the other 2 ports for the DS224C. If you need to add either HDD or SSD shelves, you can just hot-add them to the appropriate stack.