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RAID controller to boost IOP

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nstgc:
In theory a RAID controller should be able to read the same bit of data from all hard drives at the same time, however, I don't know which ones do this. Could someone suggest a RAID controller (not pure software, and preferably pure hardware raid) which does this.

[edit] I recently purchased a Raptor (the 600 GB SATA III version...suppose to be the fastest SATA drive), but am very dissatisfied. Its hardly faster than my Samsung F3 and has this 20 GB region where performance is absolutely terrible. I'm looking at the new Adaptec 6405, but can't find the information I want.

[edit2] Also, I would hope this wouldn't increase latency too much.

datora:
.

--- Quote from: nstgc on May 27, 2011, 08:23:07 PM ---recently purchased a Raptor (the 600 GB SATA III version...suppose to be the fastest SATA drive)
--- End quote ---

Um ... do you mean SATA VII, or the 6.0 GB/sec specification ..?  Because the SATA III is a 3.0 GB/sec specification.  And, how is it connected to your system?  If directly via your motherboard, check your mobo spec and make sure it supports 6.0 GB/sec ..... and/or make sure the drive is being recognized at that spec.  Occasionally the drive needs to be jumpered to force the top specification, or a firmware &/or BIOS upgrade might be in order.

After that, the question is: are you trying to add in a RAID card to a PC workstation?  Create a stand-alone RAID system like a NAS, server, etc.?  I think you need to be using a PCIe slot of 4x or 8x to get top RAID performance; don't think you have to go all the way up to 16x.  But, a 1x PCIe will limit you, and a standard PCI will be as bad or worse.  Also, assuming a Win 7 64-bit environment ..?

Sorry I'm not up to speed on RAID controllers, so I won't be of much help there ... other than, from my casual knowledge, it seems that Intel add-on cards using PCIe at least at 4x are the minimum quality/standard you should be looking at if you want real performance.

kitamesume:
hey i thought of an idea, if its possible, would using software raid on a ramdisk + hdd work?(by ramdisk i meant using your ram as a hdd by means of software)

yes it might lose some files right after shutting down the pc but what if the software raid knows that its a ramdisk and uses it as a buffer instead and rewrites it into the hdd in the background.

something like the ramdisk is being used as a raid1 style buffer, so on boot up the software raid fills up the ramdisk again with the most used files.

vuzedome:
You're gonna need a lot of ram for that.

Freedom Kira:
Have you tried just plugging into a mobo with Intel Rapid Storage Technology and using the onboard RAID?

Now you got me curious. Just how many people around here actually use RAID cards for performance?

These are the CDM results I get from using four of these SSDs in RAID 0 using Intel RST. It seems that the mobo is bottlenecking the IO, since, theoretically, it should be able to reach about 1GBps sequential R/W. Computer's specs were i5 2400S, 4GB low latency, P8H67-M EVO, Win7 Pro.

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