The OCZ Vertex 3 Review (120GB)
by Anand Lal Shimpi on April 6, 2011 6:32 PM ESTAnandTech 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.
While our heavy 2011 workload may be a little heavy on the writes, the light workload is a bit more balanced. As a result we see the 120GB Vertex 3 move up in the charts a bit more. It's still not as quick as the 240GB drive but it's pretty much quicker than anything else.
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pfarrell77 - Sunday, April 10, 2011 - link
Great job Anand!ARoyalF - Wednesday, April 6, 2011 - link
For keeping them honest!magreen - Wednesday, April 6, 2011 - link
Intro page: "It's also worth nothing that 3000 cycles is at the lower end for what's industry standard..."I can't figure out your intent here. Is it worth noting or is it worth nothing?
Anand Lal Shimpi - Wednesday, April 6, 2011 - link
Noting, not nothing. Sorry :)Take care,
Anand
magreen - Wednesday, April 6, 2011 - link
Hey, it was nothing.:)
vol7ron - Wednesday, April 6, 2011 - link
Lmao. Magreen, I like how you addressed that.Shark321 - Thursday, April 7, 2011 - link
On many workstations in my company we have a daily SSD usage of at least 20 GB, and this is not something really exceptional. One hibernation in the evening writes 8 GB (the amount of RAM) to the SSDs. And no, Windows does not write only the used RAM, but the whole 8 GB. One of the features of Windows 8 will be that Windows does not write the whole RAM content when hibernating anymore. Windows 7 disables hibernation by default on system with >4GB of RAM for that very reason! Several of the workstation use RAM-Disks, which write a 2 or 3 GB Images on Shutdown/Hibernate. Since we use VMWare heavily, 1-2 GB is written contanstly all over the day as Spanshots. Add some backup spanshops of Visual Studio products to that and you have another 2 GB.Writing 20 GB a day, is nothing unusual, and this happens on at least 30 workstations. Some may even go to 30-40 GB.
Only 3000 write cycles per cell is the reason why we had several complete failures of SSDs. Three of them from OCZ, one Corsair, one Intel.
Pessimism - Thursday, April 7, 2011 - link
Yours is a usage scenario that would benefit more from running a pair of drives, one SSD and one large conventional hard drive. The conventional drive could be used for all your giant writes (slowness won't matter because you are hitting shut down and walking away) and use the SSD for windows and applications themselves.Shark321 - Friday, April 8, 2011 - link
HDD slowness does matter! A lot! Loading a VMWare snapshot on a Raptor HDD takes at least 15 seconds, compared to about 6-8 with a SDD. Shrinking the image once a month takes about 30 minutes on a SDD and 3 hours on a HDD!Since time is money, HDDs are not an option, except as a backup medium.
Per Hansson - Friday, April 8, 2011 - link
How can you be so sure it is due to the 20GB writes per day?If you run out of NAND cycles the drives should not fail (as I'm implying you mean by your description)
When an SSD runs out of write cycles you will have (for consumer drives) if memory serves about one year before data retention is no longer guaranteed.
What that means is that the data will be readable, but not writeable
This of course does not in any way mean that drives could not fail in any other way, like controller failure or the likes
Intel has a failure rate of ca 0.6% Corsair ca 2% and OCZ ca 3%
http://www.anandtech.com/show/4202/the-intel-ssd-5...