Channel Register

Comments on: Dell gets in a state over SSD claims

Actually the report didn't name Dell, they outed themselves 

Posted Wednesday 19th March 2008 17:50 GMT

One of the interesting items is the report never names the computer supplier. Some Apple rumor sites were speculating it could be Apple, Leveno, or Dell.

Then some intermediate stories claimed it was Dell even though the report didn't state it was Dell.

Until Dell got upset, no one really knew. Of course, the denial basically confirmed that it was in fact Dell.

Hm... 

Posted Wednesday 19th March 2008 18:10 GMT

Joke

"However, critics have grumbled that flash drives, given their expensive price tag, fail to provide a better overall experience for the customer."

Hm... I wonder how many of those were seeing Vista for the first time and blaming the SSD for the "experience"...

Lies, damn lies and .... 

Posted Wednesday 19th March 2008 18:10 GMT

Surely this is an easy one to prove or disprove? An analyst quoting a statistic like "20-30% return rate" can either back it up with fact or not - same goes for Dell. Me, I'd tend to believe the analyst ...

Failure rate 

Posted Wednesday 19th March 2008 18:53 GMT

Alert

on average across the whole board is about 20% in the first 3 years on laptops. So im inclined to disbelieve the 1-2% remark.

Plus Flash drives are relatively new on the market which begs the question about Dells comment regarding reliability on SSD drives.

Weird 

Posted Wednesday 19th March 2008 19:42 GMT

Linux

The SSD in my EeePC seems fine, and there's no outcry on the Eee forums about high failure rates. Are Asus just lucky or have Dell or whoever bought a bunch of duff ones?

Performance 

Posted Wednesday 19th March 2008 19:59 GMT

Performance should be good but it depends on the file system.

You can't write to flash as many times as a hard disk so they employ wear leveling which probably won't work too well with NTFS (it fragments quite a bit) as it writes in sequential order to even out the wear on the flash blocks.

NTFS 

Posted Wednesday 19th March 2008 22:23 GMT

Coat

NTFS=Neanderthal Technology Filing System.

The animal skin and club please..

Me go bash rocks together, get it eventually..

@Giles Jones 

Posted Thursday 20th March 2008 06:41 GMT

"""You can't write to flash as many times as a hard disk so they employ wear leveling which probably won't work too well with NTFS (it fragments quite a bit) as it writes in sequential order to even out the wear on the flash blocks."""

Actually all the information that I've seen suggests that without wear leveling you'd be fine for far longer than the life of the drive. The newest drives will do 10M writes to each sector before they die.

Plus, fragmentation and other filesystem details don't matter much when your seek time is as low as what SSDs quote.

So either the manufacturers lie about the write count and seek times, or customers are too thick to notice the performance changes. Either is likely.

SSD in EEE 

Posted Thursday 20th March 2008 08:41 GMT

Thumb Up

Is a completely different beast to the SSD in a Dell.

SSD write limit 

Posted Thursday 20th March 2008 08:54 GMT

I wonder how many people are running vista on low ammounts of RAM and thus hammering the swap file and burning out the SSD.....

After all, vista really needs a minimum of 2Gb

Flash HD wear out-how? 

Posted Thursday 20th March 2008 11:00 GMT

Jobs Halo

please could someone explain, in simple terms, how a SSD wears out when there are no moving parts?

RE: Flash HD wear out-how? 

Posted Thursday 20th March 2008 12:10 GMT

My understanding was that the charge held in the memory eventually causes the structure of the transistors to break down due to electron migration or some such.

@ Flash HD wear out-how? 

Posted Thursday 20th March 2008 12:23 GMT

Stop

And while you are at it, please explain how, with no moving parts, the following items do not last forever:

Lightbulbs

CPUs

Rechargable batteries

...

</saracsm>

@ Flash HDD ware out-how 

Posted Thursday 20th March 2008 13:34 GMT

they stop switching states after so meny wites but the new ones are so good they last longer then the moving parts in a standerd hdd would (the time frames qouted where 20+years constent writing)

I can not find the link but it is on el reg somwhere

Got one myself, no problems here 

Posted Thursday 20th March 2008 13:48 GMT

Got a Samsung SSD myself and had no problems with reliability. Its also blazingly fast :)

I think this "analyst" is just plain lying.

@ Flash HD wear out-how? 

Posted Thursday 20th March 2008 14:15 GMT

Have a read of:

http://en.wikipedia.org/wiki/Flash_memory

It's fairly accurate and esplains the basics. In short, each write damages the structure slightly. You do not need moving parts. Think of it like a lightbulb, every time you turn it on you damage it ever so slightly, and it gets a little damaged while being used. Eventualy it cant take it any more and goes bang.

I know this is very simplified, but it is a fair analogy.

@Flash HD wear out-how? 

Posted Thursday 20th March 2008 15:08 GMT

Paris Hilton

And if you think small, you'll realise that there are lots of moving parts: electrons (and 'holes') whizzing all over the place :-)

Paris, because she likes moving parts!

Flash memory hasn't worn out since the early 90s. Get over it. 

Posted Thursday 20th March 2008 15:30 GMT

"You can't write to flash as many times as a hard disk"

New types of flash memory together with wear leveling means the SSD will probably last much longer than a hard drive.

Please apply the appropriate upgrade patch to your brain to stop the knee-jerk posting to message boards every time somebody mentions "SSD" (you and all the other morons who are doubtless busy typing as we speak).

"which probably won't work too well with NTFS (it fragments quite a bit) as it writes in sequential order to even out the wear on the flash blocks."

SSDs have zero seek time so fragmentation isn't any kind of a problem on SSDs (in fact it's a good thing as it works as a natural kind of wear levelling).

Wear Leveling Calculation Example 

Posted Thursday 20th March 2008 15:36 GMT

This is a ST Microelectronics Application Note on Flash wear leveling. Even with improvements in the numbers of writes, wear leveling is still usually a good idea. In the example in the application note, the Flash lifetime is extended from about 0.5 days to almost 50 years through wear leveling.

http://www.st.com/stonline/products/literature/anp/10122.pdf

Dell EqualLogic blogger 

Posted Thursday 20th March 2008 16:56 GMT

I'm Marc Farley from Dell (EqualLogic). I don't work with the laptop SSD folks, but I became instantly interested in this story because it seemed so outrageous. I found the SSD group and checked out the story and - low and behold - was utter rubbish. We keep ORT reports for all this stuff and the flash SSDs are doing extremely well. They were sold initially for high mobility and rugged environments - a hard place for any storage to survive and they have better failure stats than disk drives. And that was for the first generation product. Early failure stats for 2nd gen SSDs are spectacular.

As to wear out. Yes, we use wear leveling algorithms to alleviate this, but at some point, there will be some statistical distribution of cells that can't be written to. Mind you, this takes some time. Anyway, the point is, Dell SSDs are designed to convert to read only devices when this happens. I don't know how this is done or at what point - but the main thing is that data is preserved, not lost.

This whole thing is so overblown and reckless. The technology is already highly reliable and getting even better. This will be born out over time.

My Dell XPS 1330 

Posted Thursday 20th March 2008 18:38 GMT

Thumb Up

Is great although there are several niggles with it. They could either be down to an intermittent hardware fault or Vista or a mixture of both. I may have had an issue with the SSD when some kind of file corruption locked me out of the machine and I had to rebuild it when the password restore didn't work.

Anyway, it's a keeper as far as I'm concerned. Roll on bigger drives though.

wear and tear 

Posted Thursday 20th March 2008 20:59 GMT

Heart

there are so many different opinions on how long an ssd will last.

as soon as there is a story on el reg re mass failure of eeepcs, then we will all know for sure how long an ssd lasts, in the mean time, shut your holes because no one really knows!!!!

[/rant]