2010-11-10 12:15 AM
With NetApp jumping on the SSD drives, in addition to their previous solid state lineup consisting of the PAM-II cards, I really wonder why they chose to fit these drives only in the DS4243 shelf. The density of SSD drives would make them a perfect fit for the DS2246 shelf, and it would provide even greater performance/density/power ratio. Are there SSD drives planned in the future for the new 2,5" shelf?
2010-11-10 05:36 AM
I can only second to that question, 2.5'' SSDs make perfect sense to me.
IMHO the likely reason is simply the validation & testing routine, so someone made the decision to introduce 3.5'' SSDs first.
2010-11-10 06:54 AM
From the Storage Subsystem Technical FAQ:
SSD drives have a 3Gb/s interface. They would be unable to take advantage of the 6Gb/s speed offered by the IOM6 capable DS2246 shelf.
2010-11-10 07:00 AM
This particular argument doesn't stack up in my view:
1) SSDs wouldn't be any slower in DS2246, as the DS4243 they are supported in is 3Gbit SAS anyway
2) With SSDs it's all about random IOPS, not about throughput
2010-11-10 06:05 PM
The reason the SSDs are in the DS4243 shelf and not the DS2246 shelf was a time-to-market reason. Combining the intro of both SSD and DS2246 added risk to bringing each new capability to market in a timely fashion. Now that the DS2246 is shipping, there is the flexibility to use it in the future with SSD.