The V should have 5k cycle NAND (34nm).
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The V should have 5k cycle NAND (34nm).
Morning update:
310 hours, 91.2361 TiB, Wear Leveling Count and Percentage of the rated lifetime used has gone from 50 to 48.
Avg speed reported from anvils app is 88.37 MiB/s
MD5, no errors.
Attachment 117650
Is anyone testing endurance of the intel 520 series? Or do we expect that to match one of th profiles we're currently testing due to same nand tech being used or similar? Trying to find relatively in-expensive drives for a write cache for the array which I would expect >200TiB of writes per drive in say 1 year. I know the pliant ones can do this but they're 10x+ the cost of everything else.
@stevcs
I expect you are thinking of the Intel 510 Series SSD (the 520 Series is due Q4?)
There are currently no-one testing the 510 series, being 34nm it should do well vs the m4, you should also consider the 320 Series 80-120GB as 25nm looks to be great!
The Marvell 9174 Controller is used by the Crucial M4, Intel 510 & Corsair P3, however both Intel & Micron produce their own unique firmware. There may also be other significant differences. NAND configuration, DRAM, Spare Area etc.
Intel do however specify workload parameters for Client and Enterprise applications, so those specs could be used to determine suitability for a particular workload. As can be seen in this thread those workload estimates appear to be quite conservative.
A small increase in reserve area would be enough to significantly increase work load capability, if the workload was a problem.
@anvil- you're correct, sorry (always thinking a generation ahead) but I meant the 510/elmcrest not the 520/cherryville. Problem with the 3xx is that they're all 3Gbps, not a problem in itself (as I don't except a single drive to do more than 100MB/s) but I'm looking to put them all into external chassis so want to make sure that all are running at 6gbps for the expander(s). (I've run into problems before mixing/matching, it's better to have everything the same signaling).
@Ao1, yes, that's what I thought as well. I was actually planning on 28% or so over-provisioning for whatever SSD. Just trying to pick the right ones for the workload. Since this is a 'write cache' drive (it's main purpose is to cache all random writes to the back-end datastore which is ~200TB) with about 100GB/day I don't want to have the replacement issues at work (don't know the actual brand, but EMC&Oracle use SSD's for their Tier 0 in the sans, for heavy database functions they don't last a year. Not a big deal as the client's are paying for the speed so the thousands $$/drive is not an issue. A 'little' different for a home system however. ;)
While it can't be shown in this test here is a test someone ran on an Intel X25-V measured durability
http://translate.google.com/translat...ogle.com&twu=1
Don't know if this will help but as a guide the Intel 320 is spec'd for around 15TB with a 4K 100% random workload over the full span. (TB varies depending on drive capacity). Reducing the span and adding over provisioning will increase write capacity significantly, but 200TB of random 4K writes is going to be a tall order for any non enterprise SSD any way you try to cut it.
@stevecs
What workload are you talking about?
If there are loads of small random writes then you need to buy a drive like the X25-E or the new 710 Series.
The 710 Series is priced at ~$700-$750 per 100GB and is available in 100GB, 200GB and 300GB capacity.
(price based on 4K NOK ex.vat for the 100GB and a 5.5 exchange rate)
Actually, I /WAS/ waiting on the 710 series for this, it's just that I'm antsy and wanted something sooner considering it seems they keep pushing things back in release schedule right now I can't even find a solid release date for the 710's. The E's are such old technology and frankly don't hold up really to that type of workload I would have (4KiB writes generally and then block reads as that write cache is flushed to the main storage system). So not too friendly for SSD's but the latency is the key here so it's either SSD's or battery-backed ram;
I've heard within a month or so, as the price has surfaced the last few days I expect there is hope for a such a timeline.
The Intel 710 series is SATA 3Gbps.
Eveningupdate:
Due to an power failure my pc got shut down this evening. When I startet up again Anvils app startet from 84 TiB (from when I updated to the latest ver) Anvil is helping me to fix it so the log is correct. This evening you just have to enjoy my smartdata.
1635 P/E used ~95 TiB. Speed before the power failure was 88.36 MiB/s, AD is down form 48 to 46. No MD5 errors before the shutdown.
I'll start up again when it's ok.
Attachment 117667
Every loop is saved in a second table so BAT's issue was fixed.
--
159.08TB Host writes
MWI 13
Reallocated sectors, 6.
MD5 OK
Do you guys think the Intel 520s will use Sandforce controllers ???
ATM Sandforce I is to be avoided because of cold start bug and other problems people are having with these drives suddenly dying and write throttling as well. Also, the NAND used is of arguable quality and the various bait and switch ( 25nm and Spektek etc. ) methods used by vendors is not reassuring.
I don't know about SF II but I doubt much has improved since I see loads of people having issues there as well.
If you want the most usable SSD for daily use then I think this thread has shown that you cannot go wrong with the Intel, Crucial and the Samsung.
What do you guys think ???
Maybe someone can setup an automatic reboot and re-secure erase and repeat etc. script so we can test the secure erase endurance too without needing manual input ??? It should not be too hard to do on Linux with an old machine etc. Too bad I don't have the SSD or the cash to dedicate for one because I could get this old machine and the script ready. Maybe someone else can try on their own or help me do this ???
I think it really is important we also test this aspect of endurance as this really pushes the SSD to its limits as it is like writing to the whole capacity of the SSD in about 10 seconds and uses one NAND cycle on all of the SSD's cells etc. !
Intel should stick to Intel controllers... I don't want anything SF based at this point.
Has anyone started testing a 240GB Vertex 3 yet?
lifetime write throttling would make it impossible.Quote:
Has anyone started testing a 240GB Vertex 3 yet?
Morningupdate:
My problem from last night was effectively fixed by Anvil and now everything is going as normal.
97.2497 TiB. 332 hours (the downtime was 2 hour) Wear Leveling Count and Percentage of the rated lifetime used has gone from 46 to 44.
Avg speed reported from anvils app is 90.42 MiB/s. Looks like the 2 hours break made my speed improved some.
MD5, no errors.
Attachment 117679