2 x Samsung 840 Pro setup

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Hi.

I just got my second 840 Pro installed in the system. I enabled RAID 0 for my 2 drives. Because of that I can longer use Samsung Magician and its RAPID function. The program does not even regocnize I have a Samsung drive, and I lost about ~30% performance in all the benchmarks by having RAID 0 vs 1 single 840 Pro in AHCI mode and RAPID mode on in Samsung Magician. I am planning to get rid of RAID since I don't see any benefits of having it, except that I actually have 1 volume instead 2 splitted for my system, games and apps.

Is there any other way to merge my 2 SSDs into without having them installed in RAID, so I can use Samsung Magician?
 
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navalweaponsofficer
To get that much of a performance increase which is beyond the max speed of the SATA III bus I would have to guess that the Samsung Magician is cashing your SSD to system RAM. The software is also probably also checking to ensure you are using a Samsung SSD. When you use RAID the MB does not report the disk manufacture anymore it will report Intel raid marvel raid etc. This will also likely prevent JBOD from working if it is even supported by your hardware. The only option I really see to combine the storage space of the two SSD's is to use MS's software solution in Disk Management but this would need to be done after OS install and I do not know if it will allow you to join two drives when one is the boot drive. Even if you could you...
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Well my performance also doubled if comparing raid 0 to a single ssd without using any features from Samsung Magician. I get the same numbers as you do. Buy when I activate high performance profile, RAPID mode and do an optimization for a single drive in Magician, it beats RAID 0 by %30.

How to create JBOD? Do I have to do it before os installation? Is JBOD type of RAID 0? Because Samsung Magician does not recognize 840s in raid as Samsung drives and cannot apply any of the features...
 
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navalweaponsofficer

navalweaponsofficer

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To get that much of a performance increase which is beyond the max speed of the SATA III bus I would have to guess that the Samsung Magician is cashing your SSD to system RAM. The software is also probably also checking to ensure you are using a Samsung SSD. When you use RAID the MB does not report the disk manufacture anymore it will report Intel raid marvel raid etc. This will also likely prevent JBOD from working if it is even supported by your hardware. The only option I really see to combine the storage space of the two SSD's is to use MS's software solution in Disk Management but this would need to be done after OS install and I do not know if it will allow you to join two drives when one is the boot drive. Even if you could you could join the two drives in Disk Management my guess is that it still will not do what you want it to do. It would probably be best if you leave the two drives separate to maintain the software cashing to RAM operational. Here is something to think about the real world performance difference you will see between these two configurations is likely minimal you will see it in benchmarks but not so much in real life. I went from an SSD on SATA II 260MBps to 2 SSD's on SATA III in RAID 0 1010MBps although there was a real world improvement I would call it insignificant. What is more important to you one large disk at 1000MBps or two smaller disks at 1200MBps.

You can Google search JBOD for additional information but I now do not think it will work for what you are trying to achieve.
 
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When I was talking about performance increase, I mean 30% higher overall score in AS SSD Benchmark, and mostly due to a higher access time with RAPID feature ON in Magician. The write and read speeds were same ~1000 MBS in both setups - RAID 0 and separate with RAPID mode ON.

You are right, Magician ensures I only use Samsung SSD and only in a single drive mode. As soon as I put both of my 840 Pros in RAID 0 it detects it as just an Intel RAID 0 and locks all the Magician features, even firmware update.

Unfortunately JBOD does not work with boot OS on it... Just tried...

To get drives working in JBOD you have to make them dynamic, and then at the windows setup it won't even install on it, saying that dynamic drives cannot be used for system boot.

I guess I'll keep my drives separate for now, until Samsung decides to make support for RAID configuration of their drives. For now, I'd rather have one hellova lightning SSD for my OS, apps and games with all the magician features ON, and aside with still pretty fast SSD for other stuff that does not require that speed:)
 
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