2013-01-26 01:31 AM
Our Customer want to use Flash Pool on their FAS3240HA, and purchase 6x 100GB SSD. I read the Flash Pool Design Guide and it recommeded use (3 data disk + 2 Parity).
But customer want to use (1 data + 2 Parity) to add to the aggregate, Can this configuration support by FAs3240?
Thanks & Regards,
2013-02-01 04:39 AM
With 8.1.2 you can add 6 SSD to a FAS3240 controller. The design is 3data 2parity 1 spare due to the fact that if the customer reduces the number of data drives then the flash pool can become the bottle neck. As this is a mid size system the min SSD count is 3.
For more info see the SE flash pool technical presentation from the FP
2013-02-01 09:13 AM
Ruairi is spot on. Although technically it could be done, it shouldn't be. See page 27 & 28 of the document recommended above. I've added the link to help you out: https://fieldportal.netapp.com/DirectLink.aspx?documentID=82854&contentID=104286
Another useful document to view is the Flash Pools FAQ also on the Fieldportal (https://fieldportal.netapp.com/DirectLink.aspx?documentID=75803&contentID=84931). For Flashpool & cache limitations see page 14.
Something to note, in case you your system has flash cache too:
|Due to the small cache size limits on the FAS/V3240 and FAS/V3160, it is not recommended that Flash Cache and Flash Pool are mixed within the same HA pair.|