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Nexus 7 or Wait? - Page 2

post #11 of 12
Quote:
Originally Posted by rui-no-onna View Post

There's no point to a small mechanical HDD standard. Manufacturers just need to use better controllers in their devices. Unfortunately, that's probably in direct conflict with lower tablet prices.

That's one advantage Samsung has over the rest. They make their own chipsets, NAND and RAM, not to mention they've got quite a bit of expertise when it comes to making SSD controllers. Heck, didn't they integrate the storage controller on the Exynos 5?

By the way, 26-ish MB/s sequential read and write is reasonable for a phone/tablet OS. Heck, I ran Windows 7 from a Kingston SSDNow 40GB (rebadged Intel X25-V) with around 40MB/s peak sequential for a year and it was definitely faster starting Windows, launching apps and general multitasking compared to a WD Black. It's the low random write performance that makes performance so atrocious.

From this bug report, it looks like the Nexus 7's storage controller is doing a pretty poor job at garbage collection. Kinda like those JMicron SSDs of old.

No such thing as future proofing and given how cheap the Nexus 7 is, you could easily buy an upgrade in a year or so. Mobile technology is moving so fast that even if you buy the "next gen" models now, useful life is most likely going to be just a year longer than the Nexus 7's.

As far as I know, the samsung's SSD controllers are some of the best, with only intel being on or near par. I have a samsung 840 SSD, so I know from experience they have some very reliable controllers.

SSD's are ALL about the IOPS. What I'm saying is, even without the garbage collection problem, the IOPS are still not all that acceptable. As I said, I have a 14 year old HDD that does better IOPS. Access times in the nanoseconds mean nothing if it's taking a thousand milliseconds or more to transfer 20ish MB. Although, I'm not too sure the N7's access times are even in the nanoseconds category. Id rather wait 16ms to transfer 90MB/s, than 7ns to transfer 23MB/s anyways.

When I buy a ~$200 device, I don't expect to keep it for just a year. When I buy any device, I expect to keep it for at least 2-3 years or more. Some people have gotten into getting the latest and greatest every year.....but that's kind of vain since who wants to spend that kind of money or more on a replacement upgrade every single year? People buy budget tablets mainly not to have a disposable device, but to go easy on the wallet. But even at the N7's price range, I don't see how they could even justify not having faster speeds. for example, there was what, a $50 difference between the 16 and 32GB versions....yet in actuality, the real difference in cost was around $5, hardware wise. huge apparent gouge on the storage aspect.
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post #12 of 12
Quote:
Originally Posted by AMDATI View Post

SSD's are ALL about the IOPS. What I'm saying is, even without the garbage collection problem, the IOPS are still not all that acceptable. As I said, I have a 14 year old HDD that does better IOPS. Access times in the nanoseconds mean nothing if it's taking a thousand milliseconds or more to transfer 20ish MB. Although, I'm not too sure the N7's access times are even in the nanoseconds category. Id rather wait 16ms to transfer 90MB/s, than 7ns to transfer 23MB/s anyways.

I'd like to see CrystalDiskMark or AS-SSD as well as HDTune benchmarks for that 14 year old HDD. rolleyes.gif

Admittedly, the random write performance on the Nexus 7 isn't stellar to begin with (comparable to 5400RPM 2.5" HDDs). Quite noticeable when installing apps or running other write intensive tasks. However, it doesn't render the device painfully unusable. The Nexus 7 handles games quite well as those are mostly bottlenecked by CPU/GPU rather than storage (this despite the slowness of the storage subsystem). I'd say web browsing is more affected by slow storage than gaming on Android. As for having exceptional storage performance in a $200 tablet, be realistic. My SSDs cost me more than that. rolleyes.gif Granted, the $50 difference between models is a definite gouge (at least not as bad as Apple's $100). At this point in time however, I'd rather get the far more flexible Hisense Sero 7 Pro than the Nexus 7.

I reckon newer ARM SoCs would have integrated NAND flash controllers (similar to the Exynos 5) which should improve performance. Personally, I'm waiting for product announcements and reviews for Haswell-based tablets and convertibles. Aside from a shortage of battery life, my current Android tablets already work quite well performance-wise for what I use them for. It's not like I can use them for heavy-duty work anyway. There's still a huge gap in performance between x86 and ARM.
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