OCZ Z-Drive R4 CM88 (1.6TB PCIe SSD) Review
by Anand Lal Shimpi on September 27, 2011 2:02 PM EST- Posted in
- Storage
- SSDs
- OCZ
- Z-Drive R4
- PCIe SSD
AnandTech Storage Bench 2011 - Light Workload
Our new light workload actually has more write operations than read operations. The split is as follows: 372,630 reads and 459,709 writes. The relatively close read/write ratio does better mimic a typical light workload (although even lighter workloads would be far more read centric).
The I/O breakdown is similar to the heavy workload at small IOs, however you'll notice that there are far fewer large IO transfers:
| AnandTech Storage Bench 2011 - Light Workload IO Breakdown | ||||
| IO Size | % of Total | |||
| 4KB | 27% | |||
| 16KB | 8% | |||
| 32KB | 6% | |||
| 64KB | 5% | |||
Despite the reduction in large IOs, over 60% of all operations are perfectly sequential. Average queue depth is a lighter 2.2029 IOs.
The performance advantage over the RevoDrive 3 X2 drops to around 29% in our lighter workload. The narrowing gap makes sense given the workload here. There's less to break up and distribute among all of the controllers and thus we see less of a speedup.
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jdietz - Tuesday, September 27, 2011 - link
I looked up the prices for these on Google Shopping - $7 / GB.These offer extreme performance, but probably only an enterprise server can ever benefit from this much performance. Enthusiast users of single-user machines should probably stick with RevoDrive X2 for around $2 / GB.
NCM - Tuesday, September 27, 2011 - link
Anand writes: "During periods of extremely high queuing the Z-Drive R4 is a few orders of magnitude faster than a single drive."Umm, a bit hyperbolic! With "a few" meaning three or more, the R4 would need to be at least 1000 times faster. That's nowhere near the case.
JarredWalton - Tuesday, September 27, 2011 - link
Correct. I've edited the text slightly, though even a single order of magnitude is huge, and we're looking at over 30x faster with the R4 CM88 (and over two orders of magnitude faster on the service times for the weekly stats update).Casper42 - Tuesday, September 27, 2011 - link
Where do you plan on testing it? (EU vs US)Have you tried asking HP for an "IO Accelerator" ? (Its a Fusion card)
I worked with a customer a few weeks ago near me and they were testing 10 x 1.28TB Fusion IO cards in 2 different DB Server upgrade projects. 8 in a DL980 for one project and 2 in a DL580g7 for a separate project.
Movieman420 - Tuesday, September 27, 2011 - link
I see all these posts taking all kinds of punishment, please try and remember that ANY company that uses SandForce has the SAME issues, but since Ocz is the largest they catch all the flack. If anything, SF needs to beef up validation testing first and foremost.josephjpeters - Wednesday, September 28, 2011 - link
Like I said before, it's really more of a motherboard issue with the SATA ports then it is a SF/OCZ issue. They designed to spec...Yabbadooo - Tuesday, September 27, 2011 - link
I note that on the Windows Live Team blog they write that they are moving to flash based blob storage for their file systems.Maybe they will use a few of these? That would definitely be a big vote of confidence, and the testimonials from that would be influential.
Guspaz - Tuesday, September 27, 2011 - link
I have to wonder at the utility of these drives. They're not really PCIe drives, they're four or eight RAID-0 SAS drives and a SAS controller on a single PCB. They're still going to be bound by the limitations of RAID-0 and SAS. There are proper PCIe SSDs on the market (Fusion-io makes some), but considering the price-per-gig, these Z-Drives seem to offer little benefit other than saving space.Why should I spend $11,200 on a 1600GB Z-Drive when I can spend about the same on eight OCZ Talos SAS drives and a SAS RAID controller, and get 3840GB of capacity? Or spend half as much on eight OCZ Vertex 3 drives and a SATA RAID controller, and get 1920GB of capacity?
I'm just trying to see the value proposition here. Even with enterprise-grade SSDs (like the Talos) and RAID controllers, the Z-Drive seems to cost twice as much per-gig than OCZ's own products.
lorribot - Tuesday, September 27, 2011 - link
I'm with you on this.What happens if a controller toasts itself wheres your data then?
I would rather have smaller hot swap units sitting behind a raid controller.
It is a shame OCZ couldn't supply such a setup for you to compare performance, or perhaps they know it would be comparable.
Yes it is a great bit of kit but f I can't raid it then it is of no more use to me than as a cache and RAM is better at that, and a lot cheaper, $11000 buys some big quantities of DDR3.
In the enterprise space security of data is king, speed is secondary. Losing data means a new job, slow data you just get moaned at. That is why SANs are so well used. Having all your storage in one basket that could fail easily is a big no, no and has been for many years.
Guspaz - Tuesday, September 27, 2011 - link
To be fair, you can RAID it in software if required. You could RAID a bunch of USB sticks if you really wanted to. There are more than a few enterprise-grade SAN solutions out there that ultimately rely on Linux's software RAID, after all.