Personal computing discussed
Moderators: renee, morphine, Steel
cynan wrote:I'll be using the storage controller on the X79 chipset
morphine wrote:Geoff recently did an article analyzing the RAID-0 proposition with SSDs (I can find the link if you want). Bottom line: if you do that, you'll end up hurting performance overall in the mid/long run, because you'll lose TRIM.
vargis14 wrote:I would also keep then separate,they are plenty fast alone and having different programs especially if they are HD intensive programs on 2 separate HDs will allow you to run 2 HD intensive programs at the same time without a slowdown. Well at least a minimal one.
They are fast enough alone,i do not think they have to hold hands:)
Voldenuit wrote:The Corsair Performance Pro's idle garbage collection works as well as TRIM. I say go for the RAID-0.
morphine wrote:Although those results are interesting in themselves, in that review they didn't actually RAID the drives. Geoff's SSD scaling review (link to first results page) shows what happens when that is done. It's especially painful for the RAID sets in the file copy tests, as the used state results are abysmal for the most part. And in boot and level load times the results are pretty much a wash.
cynan wrote:my preference would be to have a single 512GB drive
rcs2k4 wrote:But random seek times are near-zero for SSDs whether you RAID them or not. So there's no advantage to RAID there. This is why I asked what the OP's intended usage was: if it's something that is primarily latency-gated, then RAID isn't going to make any difference. Putting the two drives into RAID is only going to offer a performance benefit if the OP needed STR throughput greater than what one SSD can provide, and in non-server scenarios there aren't many of those -- even heavy raw video editing is unlikely to be an issue, and 512GB probably isn't enough space for that anyway. There are other reasons to combine the disks -- to make them appear as one volume for simplicity's sake, for example, though in that case I'd look at alternatives (ie redirection) that don't force you to give up TRIM.Seq read and write is naturally better with them in raid 0 too, but you dont really notice it in day to day use IMO. The biggest advantage is the random seek times, and single disk or not any SSD is 8x or more better than a mechanical drive at this, and it's this performance increase you notice.
Not to pick on you in particular, but I wish people wouldn't talk about TRIM and garbage collection like they're interchangeable replacements for each other. Even the best garbage collection algorithm might be useless when it has no garbage to collect, because it doesn't know which blocks are garbage, because the file system can't use TRIM to tell it what blocks actually contain disposable data from files that have been deleted. No matter how good the garbage collection might be, you're eventually going to need a mechanism that can pass that file-system-level knowledge down to the SSD controller or you will see write performance drop.My Patriot drive's are no Sandforce, but im happy with this and still say raid 0 them (as long as those drives have a trim-esque garbage collection algorithim)...
rcs2k4 wrote:Edit:
UberGerbil wrote:But random seek times are near-zero for SSDs whether you RAID them or not. So there's no advantage to RAID there. This is why I asked what the OP's intended usage was: if it's something that is primarily latency-gated, then RAID isn't going to make any difference. Putting the two drives into RAID is only going to offer a performance benefit if the OP needed STR throughput greater than what one SSD can provide, and in non-server scenarios there aren't many of those -- even heavy raw video editing is unlikely to be an issue, and 512GB probably isn't enough space for that anyway. There are other reasons to combine the disks -- to make them appear as one volume for simplicity's sake, for example, though in that case I'd look at alternatives (ie redirection) that don't force you to give up TRIM.
Waco wrote:Those 4K results are terrible for an SSD let alone a pair in RAID 0. Have you updated the firmware of your drives? The newest one seems to help a bit: http://www.servethehome.com/patriot-ps1 ... are-v3000/