| OCZ Vertex 3 Max IOPS Edition SSD |  |
| Reviews - Featured Reviews: Storage | |
| Written by Olin Coles | |
| Tuesday, 24 May 2011 | |
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Page 7 of 13
ATTO Disk BenchmarkThe ATTO Disk Benchmark program is free, and offers a comprehensive set of test variables to work with. In terms of disk performance, it measures interface transfer rates at various intervals for a user-specified length and then reports read and write speeds for these spot-tests. There are some minor improvements made to the 2.46 version of the program that allow for test lengths up to 2GB, but all of our benchmarks are conducted with 256MB total length. ATTO Disk Benchmark requires that an active partition be set on the drive being tested. Please consider the results displayed by this benchmark to be basic bandwidth speed performance indicators.
ATTO Disk Benchmark: Queue Depth 4 (Default)
ATTO Disk Benchmark: Queue Depth 10 (Maximum)Our basic bandwidth speed tests begin with the OCZ Vertex 3 MI SSD attached to the Intel SATA 6Gb/s controller operating in AHCI mode. Using the ATTO Disk Benchmark tool, the test drive performs file transfers ranging from 0.5 KB to 8192 KB. The VTX3MI-25SAT3-240G model we received reveals 599 MBps maximum read speed that plateaus from 128-8192 KB file chunks, and 519 MBps peak write bandwidth plateaus from 64-8192 KB. These both exceed SandForce specifications, and meet the manufacturer's own specification.
In the next section, Benchmark Reviews tests sequential performance using the CrystalDiskMark 3.0 software tool...
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Comments
The only "con" to your review, one of few I've ever had, is the slight hit you issued in your conclusion regarding "expensive enthusiast" product. OK, it is contrary to the masses and their hard earned dollars, no question. The 240 Gb version at $2.58/Gb is a goodly sum. But looking at it from a performance standpoint, and thinking of the terminology "enthusiast" makes me think of it not as a "con" but pretty mainstream, if not reasonable as far as bang-for-buck goes.
There's my two cents worth, raising the price to $2.60/Gb. But no one will pay, right?
80,103 IOPS Random Write (4k)
36,120 IOPS Random Read (4k)
556MB Sequential Write
515MB Sequential Read
Really solid build aswell, which perhaps isn't suprising since these guys apparently are better known in the military/rugged world. Shaping up to be one of best purchases I ever made!
The 240GB drive is much faster than the 120Gb drive. It gets even worse with 60/64 Gb(like vertex 2 series) drives which can be 70% slower than the 240Gb drive with incompressible write speed.
This review gives people the impression that a 120GB drive will perform like a 240GB drive but they do not.
I know its part of the marketing to send only the big fastest drives to reviewers but the performance difference between capacities should be more clearly explained
comment just sent - unclear as to why the above 2 fields have bounced back yet contents of message was sent?
Olin, my response was not directed at your valid comment.
I simply sent a lengthy comment to Benchmark Reviews about the relevance
of the performance of the slowest component in a system - the hard drive.
It was not published.
I run 2 older Sata2 SSD's (A-RAM 32Gb) in Raid 0 to kick start the system and run a few apps. When I was using a single SSD and Ubuntu 9.04 the read/write speed was 270/253 Mb. In terms of the 'IOPS' I had no idea and didn't appreciate the importance as an equal indicator of overall system performance.
All of my other mid range bits that make up the system are more than adequate for what I do....6 core AMD,a GTX460, a Raptor storage drive, a SATA3 & USB3 motherboard, blue-ray burner,2 LED 22" screens etc.
My point and I'm sure many of you have read that the money spent on the hard drive replacement 'SSD' should be the priority.
When I get the bucks OCZ will be my next upgrade.
Question : when in Raid 0, is the read/write & IOPS doubled also?
And, as Olin wisely adds, a LOT depends on the controller.
The closest we've come to near-linear scaling was the combination of a Highpoint RocketRAID 2720 and 4 x Hitachi 15,000 rpm 2.5" SAS HDDs each with 64MB of cache:
3 x HDDs in RAID 0 topped out at 441 MB/second
4 x HDDs in RAID 0 topped out at 618 MB/second
We would not have ever tried 3 x HDDs, except that one was
defective from the factory, so we configured a RAID 0 with 3
of these Hitachis, while we waited for the replacement to arrive.
But, this near linear scaling has been the exception, NOT the rule, in our experience with RAID 0 arrays (which we use often, primarily for speed).
Sincerely yours,
/s/ Paul A. Mitchell, Instructor,
Inventor and Systems Development Consultant
All Rights Reserved without Prejudice
Thanks again for another good review.
A question keeps coming up, as I read these various reviews:
if TRIM does not work with multiple SSDs configured in a RAID array,
do you happen to know if TRIM will work if each SSD is configured
in AHCI mode, and then joined to an OS "software RAID"?
Do you have enough instrumentation at your lab to answer this question?
I'm aware that an OS "software RAID" cannot host the OS,
but I have an XP software RAID running well with 2 x 6G WD HDDs,
hosting a dedicated data partition, and it appears to work just fine.
RSVP if/when you have the time.
Thanks again! Keep up the good work.
Sincerely yours,
/s/ Paul A. Mitchell, Instructor,
Inventor and Systems Development Consultant
All Rights Reserved without Prejudice
So long as the drives are in AHCI/IDE mode with an OS that supports TRIM (Microsoft Windows 7), then the commands will receive the SSD. Hardware RAID does not use AHCI/IDE mode, and will not pass along TRIM commands. So if you're using Windows 7 (not XP) and configure mirrored sets in the Disk Management console using AHCI/IDE SSDs, then it's not truly RAID and you'll have the benefit of TRIM support... with the penalty of a CPU/RAM hit for software mirroring.
Thanks again, Olin!
By "mirrored sets" do you mean RAID 1, for example, and not RAID 0?
Also, just to clarify, do you predict the same for RAID 0 / striped arrays using OS software RAID?
This could be the topic for another Review, perhaps.
p.s. With so many quad-core CPUs proliferating, now with hyper-threading too, the CPU-RAM hit does not seem to be a huge penalty to pay, particularly for desktop and workstation users.
Also, users who have shrunk their C: system partitions have probably also created dedicated data partitions e.g. D:+ Those dedicated data partitions would be good candidates for a software RAID, particularly if TRIM will work reliably, as described above.
Sincerely yours,
/s/ Paul A. Mitchell, Instructor,
Inventor and Systems Development Consultant
All Rights Reserved without Prejudice
XP/Pro supports software RAID 0 also:
we have it running on a P45 chipset
with 2 x 6G Western Digital 1TB HDDs.
I'm not currently a Windows 7 user,
but I would expect that the same is true
for Windows 7.
The partitions need to be changed to "Dynamic" first;
but after that, it's a piece o' cake to configure software RAID 0
as long as the drive letter is NOT C: .
One needs to use the OS to effect this configuration,
so structural changes to C: are not possible at this point.
Do you have some spare hardware laying around,
with which to try it? Maybe 2 x 6G SSDs (my preference)?
OCZ might be particularly interested in this experiment,
with your usual battery of benchmark tests.
You be the "Benchmark Man" -- to be sure!!
Sincerely yours,
/s/ Paul A. Mitchell, Instructor,
Inventor and Systems Development Consultant
All Rights Reserved without Prejudice
##softwaresecretweap ons.com/jspwiki/windows-7-software-raid-disk-partition-and-volume-context-menus
"New Striped Volume" is an option.
Sincerely yours,
/s/ Paul A. Mitchell, Instructor,
Inventor and Systems Development Consultant
All Rights Reserved without Prejudice
somehow "softwaresecretweapon s.com"
became "softwaresecretweap ons.com" above:
just eliminate that extra space after "weap"
Sincerely yours,
/s/ Paul A. Mitchell, Instructor,
Inventor and Systems Development Consultant
All Rights Reserved without Prejudice
The experiment I'm suggesting would need Windows 7
to configure a software RAID 0 with 2 x 6G SSDs
initialized in AHCI mode.
The question at hand: will Windows 7 pass TRIM commands
to 2 x SSDs configured in an OS software RAID 0?
Sincerely yours,
/s/ Paul A. Mitchell, Instructor,
Inventor and Systems Development Consultant
All Rights Reserved without Prejudice
[begin quote]
The Professional/Enterprise/Ultimate editions of Windows 7 officially support the following dynamic disk modes:
* Simple
* Spanned
* Striped (RAID-0)
* Mirrored (RAID-1)
These are the officially supported modes. It has been possible in previous Windows releases to enable unsupported modes through DLL modifications and/or registry changes, and this will probably be the case in Windows 7 as well. At your own risk, of course.
RAID-5 dynamic disks are only available in Windows Server editions.
Note that dynamic disks are not available in the Standard/Home editions of Windows 7.
[end quote]
Sincerely yours,
/s/ Paul A. Mitchell, Instructor,
Inventor and Systems Development Consultant
All Rights Reserved without Prejudice