Comments on: LSI 9265-8i MegaRAID Card vs Adaptec 6805 RAID Card – The Ultimate 6Gb/s RAID Showdown

By: Norm

Norm — Tue, 03 Jun 2014 22:26:00 +0000

I know this article is old but I’m in the market for a good RAID card si I though I’d share the following info for whoever else is (I’m surprised at the lack of recent RAID controller reviews … I can only find old ones).

Although the credibility of this article is hindered by the abundance of LSI banners on the website and by the over the top and obvious ‘LSI-fanboy’ tone of the author (more professionalism would have helped), the numbers are actually not unexpected and I’m surprised nobody mentioned this: the Adaptec 6805 specs themselves mention max 50K IOPS. That’s about it … it’s a limitation of the controller and slow RAM. So it’s not surprising at all that it can’t reach the impressive numbers that the LSI 9265 did.

However, the Adaptec 6805 is not in the same class as the LSI 9265. A better comparison nowadays would be against between the LSI 9271 (same RoC, same RAM, but PCI-e 3.0) and the Adaptec 7805 (much improved RoC, DDR3 RAM and PCI-e 3.0, just like the LSI 9271). Adaptec advertises the 7805 for more than 530K IOPS. Prices are comparable.

I’d be very interested to see a review of the two.

By: laurens

laurens — Tue, 20 May 2014 11:07:00 +0000

In reply to Anonymous. There is no trim support on raid controllers. You need to have a physical connection to the OS for that.

By: laurens

laurens — Tue, 20 May 2014 11:06:00 +0000

Isn’t the speed of the Adaptec a bit slow? Makes me wonder why that is? perhaps because of the cables? If it were 10% slower of even 20% slow, OK, but I cannot deny that half the speed, something must be wrong with it…

By: E71

E71 — Wed, 23 Jan 2013 18:22:00 +0000

I can’t believe there’s no mention of TRIM. This article is a waste of time for anyone planning to use SSDs in RAID long term.

By: rsq

rsq — Wed, 24 Oct 2012 02:07:00 +0000

I was considering using an adaptec 6805 with 4 intel ssd 330 180 gb in raid 10. I keep wondering what will happen over the long run since there is no trim. How would the drives ever optimize.