0

Running on Windows 8.1 x64. Raid is 0 on two Samsung Evo SSD. Both read and write cache is enabled.

Here's result from onboard raid (ASUS-P9X79-E-WS):

enter image description here

And here's from the dedicated raid controller Adaptec 6405E: enter image description here

Can it really be true, that an onboard raid is faster than a dedicated raid controller?

3
  • 1
    You probably don't want your caches enabled.
    – ewwhite
    May 5, 2014 at 10:35
  • Have you updated the Adaptec-Firmware and Driver to the latest versions? If not, do it. We had very big problems with old firmware revisions on Adaptec controllers.
    – lando
    May 5, 2014 at 18:13
  • Hi Lando - yes firmware is latest. This is rather strange.
    – MojoDK
    May 5, 2014 at 20:29

3 Answers 3

2

The 6405E is not fast enough for SSDs. Almost all SSDs have IOP capability that will outrun a 6405E. It's a case of balance - buying fast drives means buying a fast RAID controller. Look at the 71605E for SSD RAID 0,1,10 functionality. N

1

I returned the card.

RAID on the motherboard seems way faster.

1
  • Glad you've resolved this issue. Please be sure to mark your answer as accepted when you're able.
    – jscott
    May 6, 2014 at 13:04
1

RAID 0 is a waste either way. Your SSDs are perfectly capable of providing this speed standalone.

That being said, the Adaptec 6405E controller is connected with a single PCIe Gen2 lane, this results in a theoretical maximum transfer speed of 500 MB/s. This hints at the fact that it is, considering its 4 ports, meant for regular hard disks.

I’d also recommend using a benchmark tool specialized for SSDs.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .