so far I have yet to see any testing on X25-E that produce linear performance result.
I would suggest you go with X25-M instead. You need the highest end Intel RAID controller to see the real benefit of X25-E. Most of the time, bottleneck is at the low end RAID card.
I somewhat disagree with the previous poster. Linear increase in performance can be had, but it's dependent on your RAID controller. As I mention in another post, on-board RAID chipsets are generally designed specifically for redundancy, not performance. You must have a performance RAID controller in order to benefit from several drives. As an example to back up my experience, visit the following site. It demonstrates that your RAID hardware selection is very important if you're going for speed.
Consider a RAID controller with a high-end chipset and RAM-based cache.
Does this help?
Thanks for answer. But I'm not only going for speed but also I need stability and reliability of work with SSD. So I want to know about their compatibility too. For speed quest I want to know how much IOPS ICH10R can do?
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Did you happen to see this person's article? It looks like someone out there has some experience.
So I think the best choice will be Adaptec 5805/52445 http://www.adaptec.com/NR/rdonlyres/B4350D45-E31A-429E-8058-3BE8E2F07E86/0/Series5PerformanceWhitepaperv7.pdf (250K IOPS, 1.2Gb/s transfer) + they has Intel SSD's in their list of compatibility (page 12) http://www.adaptec.com/NR/rdonlyres/C466A497-0E83-4B11-B80F-C751B155BEBF/0/4_ARCSASCompatibilityReport_040709_Series5_HiPort.pdf
zulishk, I thought I mentioned depending on the RAID controller?
anyway, does anybody has a more complete list of the X25-M/X25-E validated RAID controllers? Only Adaptec?
what's the best settings for the RAID? eg Strip size etc? I'm pretty new to RAID set up
is IOP 348 @ 1200 Mhz the highest end yet affordable RAID chip so far for up to 10-14 X25-M?
My "somewhat disagree" was only with your comment about linear results.
The best RAID settings depend mostly on the application of the system -- the levels of redundancy, storage, and performance required. You can find many articles on the Internet about RAID configurations, and some RAID info on specific applications (such as Exchange, databases, etc.). The most common RAID levels are 0, 1, 10, 5, and 6. I feel it would be off-topic to go into details about each level here, especially when it's so easily researched via the web.
As for stripe sizing, someone else on this forum mentioned 128K stripe size for his Intel SSDs, but again I think it depends on the application. In fact, some applications require specific stripe sizes. It might behoove you to test several configurations before commiting to it. In my experience with the dozens of SSDs we use in my company, you can typically treat the SSD as any normal SATA drive and be happy with the results. It seems most folks here (who are unsatisfied) are unsatisfied with 'benchmarking' tests only, but who knows if those tests are being executed properly and if they accurately represent real-world conditions? The best test is to recreate the environment it'll be running under, and test that application with the appropriate tools.
As for RAID controllers, my experience tells me if you stick with one that includes a RAM-based cache, you'll generally be very happy. Do you have a specific requirement(s), and are you trying to meet or exceed it? One of the best names in RAID technology is Adaptec, but that's my opinion.
Intel SRCSASJV (AKA LSI MegaRAID SAS 8888ELP) all the way. First its compatible with the Enterprise Intel SSDs.
second,it delivers 1.5GB/s performance http://www.lsi.com/DistributionSystem/AssetDocument/documentation/storage/megaraid/sas/mr_sas_8888elp_pb.pdf
still pretty far from Intel IOP348 1200MHz's 12GB/s range.....
I have a system like this. the first issue to overcome is getting the suppliers to make sure their ssd firmware can allow TRIM to see the raid array. I use supertalent SSD's and their performance refresh tool PRT can't see into the raid array, although they say they are rewritting their firmware. Otherwise the system seems to work ok. the throughput of the ICH10R controller is an issue which i will look into as i was not aware of any potential limitations here..