What is the available bandwidth for a shelf stack using IOM12 and SAS3 cards?
Applies to
- ONTAP 9
- IOM12
- SAS HBA
Answer
The available bandwidth when using IOM12 and SAS3 cards depends on a few factors:
- The operation size
- I/O type (read/write)
- The type of SAS HBA
- The number of SAS ports per node
With 32KB operation size the maximum bandwidth is the following:
4-shelves stack using IOM12 and 2 SAS3 ports – 6.8 GB/s
4-shelves stack using IOM12 and 4 SAS3 ports – 13.6 GB/s
2-shelves stack using IOM12 and 2 SAS3 ports – 7.2 GB/s
- A pure read or pure write workload is at the low end of the range at 5.7 GB/s.
- For 32KB operation size, the throughput range for the SAS HBA PM8072 is around 5.1GB/s - 7.2GB/s.
Additional Information
N/A
