Boot SSD and Raid0 Storage HDDs issue

preyed

Limp Gawd
Joined
Jul 16, 2008
Messages
374
I'm using a Vertex2 SSD as boot drive and I was trying to set up raid0 on two F4 HDDs on a Asus P6T SE. Problem I'm having is I have the drives set to Raid; even the SSD via the BIOS. I read you want to make sure the SSD is AHCI but I can't find a place that I can change a single drive setup like that in the bios, IE have only the SSD set to AHCI and the HDDs set to RAID. If I change it AHCI, I have boot issues. Am I missing something? or does it even matter?
 
If you try to change to ahci after the OS is installed the OS wont boot, you need to fuck with registry entries I think before you restart and set the bios to ahci mode.

Also if all drives are connected to the same controller on the mobo, well on my board anyway, you can either select raid/ahci/ide

You cant select ahci and raid on my system, its either the raid controller controls all drives or all drives run in ahci mode or ide mode.

TBH it doesnt matter what mode your ssd is in, some sites say ahci, ocz say its best to keep them in ide mode.

Aslong as you are getting decent throughput on the ssd with your original settings where it booted, I wouldnt worry about it.

If you definetly want ahci for your ssd and raid for your f4's, then put them on different controllers.
 
THanks, I was just under the impression that it was vital to have the SSD in AHCI. I'm not worried about it then.
 
The only thing you're missing out by using RAID instead of AHCI is TRIM(unless you're on an Intel system and have the newest storage driver), but Sandforce drives have garbage collection so it's not a big deal in the long run. If you give the drive enough idle time, the controller will keep itself in good condition.

Evil Scottsman: OCZ does not recommend to run Sandforce drives in IDE. The only time you should run an SSD in IDE is if you're having compatibility issues, since you end up missing out on NCQ which helps the drive perform much better under heavy IO loads. Most drives perform slower by anywhere from 5-15% in IDE.
 
NCQ ? it does jack shit.

From ocz website

Native Command Queuing (NCQ) -might- improve computer/system/hard disk responsiveness, especially in multi-tasking environment

Read as, negligible outwith a benchmarking enviroment.
 
Last edited by a moderator:
NCQ does give noticeable performance increases when there is heavy IOPs, like heavy multitasking. And I'm not talking about benchmarks, which I don't even run. Just because you don't run into those situations doesn't mean OP won't, and Sandforce excels with high queue depths. He's buying a SSD to benefit from all of it's advantages, so why hamper it running IDE which limits it's performance. On my 3 AMD based systems, IDE is around 10% slower in both sequential and random reads/writes, even at a queue depth of 1.
 
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