The SSD Anthology: Understanding SSDs and New Drives from OCZ
by Anand Lal Shimpi on March 18, 2009 12:00 AM EST- Posted in
- Storage
Once More, With Feeling
Ryan said we’d lose some sequential write performance. The drive would no longer be capable of 230MB/s writes, perhaps only down to 80 or 90MB/s now. I told him it didn’t matter, that write latency needed to come down and if it were at the sacrifice of sequential throughput then it’d be fine. He asked me if I was sure, I said yes. I still didn’t think he could do it.
A couple days later and I got word that OCZ just got a new firmware revision back from Korea with the changes I’d asked for. They were going to do a quick test and if the results made me happy, they’d overnight a drive to me for Saturday delivery.
He sent me these iometer results:
The New Vertex was looking good, but was it too good to be true?
I couldn’t believe it. There was no way. “Sure”, I said, “send the drive over”. He asked if I’d be around on Saturday to receive it. I would be, I’m always around.
This was the drive I got:
No markings, no label, no packaging - just a black box that supposedly fixed all of my problems. I ran the iometer test first...it passed. I ran PCMark. Performance improved. There’s no way this thing was fixed. I skipped all of the other tests and threw it in my machine, once again cloning my system drive. Not a single pause. Not a single stutter.
The drive felt slower than the Intel or Summit drives, but that was fine, it didn’t pause. My machine was usable. Slower is fine, invasive with regards to my user experience is not.
I took the Vertex back out and ran it through the full suite of tests. It worked. Look at the PCMark Vantage results to see just what re-focusing on small file random write latency did to the drive’s performance:
The Vertex went from performing like the OCZ Apex (dual JMicron JMF602B controllers) to performing more like an Intel X25-M or OCZ Summit. I’ll get to the full performance data later on in this article, but let’s just say that we finally have a more affordable SSD option. It’s not the fastest drive in the world, but it passes the test for giving you the benefits of a SSD without being worse in some way than a conventional hard drive.
As the Smoke Cleared, OCZ Won Me Over
Now let’s be very clear what happened here. OCZ took the feedback I gave them, and despite it resulting in a product with fewer marketable features implemented the changes. It’s a lot easier to say that your drive is capable of speeds of up to 230MB/s than it is to say it won’t stutter, the assumption is that it won’t stutter.
As far as I know, this is the one of the only reviews (if not the only) at the time of publication that’s using the new Vertex firmware. Everything else is based on the old firmware which did not make it to production. Keep that in mind if you’re looking to compare numbers or wondering why the drives behave differently across reviews. The old firmware never shipped thanks to OCZ's quick acting, so if you own one of these drives - you have a fixed version.
While I didn’t really see eye to eye with any of the SSD makers that got trashed in the X25-M review, OCZ was at least willing to listen. On top of that, OCZ was willing to take my feedback, go back to Indilinx and push for a different version of the firmware despite it resulting in a drive that may be harder to sell to the uninformed. The entire production of Vertex drives was held up until they ended up with a firmware revision that behaved as it should. It’s the sort of agility you can only have in a smaller company, but it’s a trait that OCZ chose to exercise.
They were the first to bring an Indilinx drive to the market, the first to produce a working drive based on Samsung’s latest controller, and the company that fixed the Indilinx firmware. I’ve upset companies in the past and while tempers flared after the X25-M review, OCZ at least made it clear this round that their desire is to produce the best drive they could. After the firmware was finalized, OCZ even admitted to me that they felt they had a much better drive; they weren’t just trying to please me, but they felt that their customers would be happier.
I should also point out that the firmware that OCZ pushed for will now be available to all other manufacturers building Indilinx based drives. It was a move that not only helped OCZ but could help every other manufacturer who ships a drive based on this controller.
None of this really matters when it comes to the drive itself, but I felt that the backstory was at least just as important as the benchmarks. Perhaps showing you all a different side of what goes on behind the scenes of one of these reviews.
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ryedizzel - Thursday, March 19, 2009 - link
Anand,I just wanted to thank you for an amazing article. I am a very picky buyer and technology critic, so I always come to your site for the ‘real’ story on things. In fact for the amount of time, research, and (useful) testing methodologies you invest, I almost feel guilty receiving this information for free. Especially since your findings benefit the industry as a whole since it causes manufacturer’s to fix/improve their products (well at least the smart ones do). The i7 motherboard roundup was another great example of this. Seriously, if you have a place for donations I would send you $50 in a heartbeat. I know it’s not much but if others did the same it would add up to a decent token of appreciation.
Oh and please don’t take people’s grammar or nitpicky corrections the wrong way. Yes it can be annoying, but in the end it does help the article become closer to perfect since others catch little things overlooked by human error. In the end we are all grateful for these articles, otherwise we wouldn’t be here reading them!
bsoft16384 - Thursday, March 19, 2009 - link
You know, the JMicron SSDs really aren't so bad. Yes, you'd have to be crazy to spend $400 on one when there are better options like the X25-M (or the new Vertex series for that matter).But I paid $65 for my 30GiB OCZ "Core" SSD. Yeah, random writes are piss slow. I knew this. The drive replaced the 5400.5 that came with my EEE PC.
I'm not going to be doing any 'extensive multitasking' on my EEE. I'm not running a file server, I certainly don't have antivirus in the background, and I don't spend all day installing new apps.
I'm running 7. Compared with the 5400.5, the system boots faster, Chrome loads faster, but Windows updates take longer. That's a trade-off I'm willing to deal with, considering that I get less noise and more battery life in return.
I can tell you this - the JMicron SSDs beat the pants off of the PCIe MLC SSDs that ship with many netbooks.
So, yeah, I guess this is a product that's "unfit for market". But it's perfect for some of us. If I wanted a boot drive for a Linux media/backup server (along with HDDs for storage), I could see choosing a $50 SSD over a $50 HDD.
It's all about your needs. No one is pretending that JMicron SSDs are fast, at least not at writing. But if your usage is mostly read-centric (or "nothing-centric", as is frequently the case on netbooks), and your chief criteria are low power and low price, the JMicron SSDs do quite well.
petersterncan - Thursday, March 19, 2009 - link
Anand,That was an awesome article... and good for you to give OCZ to do the right thing... and they did!
Kudos also to OCZ for actually listening to feedback and doing something about it.
Adul - Thursday, March 19, 2009 - link
Good work Anand :)SSDMaster - Thursday, March 19, 2009 - link
The stuttering problem with SSD's can be fixed with diskpart. Go do some research before you post an article this massive and convoluted.goinginstyle - Thursday, March 19, 2009 - link
No it does not, it will help if the partition is properly aligned but it is not a cure, neither is the rest of the voodoo magic being spouted on the OCZ forums. They help, but do not cure the stuttering problem with the JMicron based drives. I just love the fact that OCZ wants to sell you a drive (Core series) that does not work properly, have you purchase third party software, and then hack the OS in order to improve the performance of the product. Glad to see it fixed with the Vertex and Summit drives though, but it will take a long time before I even think about using an OCZ product again. I was hoping to see the new ADATA and SuperTalent drives in this article, maybe those are coming in the next segment he mentioned.SSDMaster - Friday, March 20, 2009 - link
Yes, it does.I have a Core series 60GB OCZ drive. I bought it right before Newegg increased the price on the drives. The stuttering was horrible, and worthless even as a secondary drive if it was formatted with XP. Also, after using Diskpart and aligning the drive I could not install XP on the drive and have it bootable.. Which sucked.
But there's ways around that, and guess what, I have a stutter free flash drive for cheap that gets very good performance numbers, and boots Server 2008 in under 10 seconds.
bsoft16384 - Thursday, March 19, 2009 - link
OCZ's product works fine. You may not like the performance, but it's certainly not unusable.The $65 I paid for my 30GiB OCZ "Solid" SSD is about what you'd pay for a USB flash drive. The disk I have has a USB interface, which is very convenient, plus it's plenty fast enough for my EEE PC.
I'm glad that Anand has done these reviews. People need to understand what they're getting into when they by a JMicron SSD. If you don't expect much, you won't be disappointed.
Arguably for a normal notebook/desktop you should buy a normal hard drive if your budget is under $100. But the JMicron SSDs do a good job in netbooks (which, again, aren't too fast to begin with) at a very low price.
I have aligned my partitions and disabled swap on my Windows 7 install (on my EEE). I also have 2GB of memory in my EEE. I haven't done any fancy tweaking on the OS.
Compared with the EEE 900A that I had briefly (PCIe SSD), my EEE 900HA is dramatically faster. You can't run XP or Vista on PCIe SSDs unless you have a lot of patience. You *can* run it on a JMicron SSD.
I honestly don't notice any stuttering. I don't run antivirus and I don't multitask much on this machine. If I demanded from my EEE what I demand from my desktop (Q9300 + 8GB + WD6400AAKS), I know that the SSD would choke up. But I'm not going to do that on a 1.6GHz single-core Atom anyway.
So, yeah, OK. I guess I think that trashing JMicron SSDs is a little like trashing USB flash drives for being slow. Paying $300 for a UFD would be stupid, as is paying $300 for a JMicron SSD. But in the sub-$100 category, you don't expect much.
When better SSDs drop below $100, maybe I'll upgrade. Until then, I'm enjoying 5 hours of battery life on my 900HA.
tomoyo - Thursday, March 19, 2009 - link
Well I think it's unusable for my needs if I'm running it as an operating system drive. I place a giant important on the latency of the drive at that point and it certainly includes random writes. Which is why I would never ever buy an ssd that's majorly below the Intel write performance. It's not worth the price premium or loss of storage size compared to the standard hard drive.Bikerskummm - Thursday, March 19, 2009 - link
Fantastic article Anand!Just a few thoughts:
I have had some trouble replicating some of the Samsung SLC results...
Despite filling the drive up and emulating a well used drive as described in the article I cannot get my Sammy drive's performance to degrade as much as you managed to especially regarding random write performance...
Now my system used for testing is a socket 775 (qx9650) and I was testing on ICH9R and WINXP (SP3) but still I would expect to see similar figures ...
I do not have an X58 system to test on at the moment but I would be very interested if The Sammy SLC drives were shown to degrade faster / perform worse with a X58 / ICH10R / Vista x64 (SP1?) setup...