SSD Write Endurance 25nm Vs 34nm

[Anvil]

The 320 can report another value for "wearout"

Look at post #799, could be that I've already been there as I've done a few extra tests on the 320 Series, will check when I get back home later tonight.

[B.A.T]

Morning update:
214 hours, 62.8925TiB, Wear Leveling Count and Percentage of the rated lifetime used has gone from 66 to 64.
Avg speed for all 214 hours is roughly is 85.6 MiB/s

[Hopalong X]

The 320 can report another value for "wearout"

Look at post #799, could be that I've already been there as I've done a few extra tests on the 320 Series, will check when I get back home later tonight.

I was hoping that might be useful.

[bulanula]

Too bad the Samsung and the Crucial have crippled SMART data. Intel is still the best at this point in time. Hoping they get their act together and develop their own 6gbps controller with 34nm NAND and best for 4K random read / write ( only few care about sequential ) !!!

[B.A.T]

Eveningupdate:
225,5 hours, 66.3894 TiB, Wear Leveling Count and Percentage of the rated lifetime used has gone from 64 to 62.
Avg speed for all 214 hours is roughly is 85,75 MiB/s

[johnw]

Too bad the Samsung and the Crucial have crippled SMART data.

Huh? I think the Crucials have the most comprehensive SMART attributes of any of the SSDs in this experiment.

[johnw]

92.630 TiB, 262 hours, sa177: 1/1/7588

102.957 TiB, 290 hours, sa177: 1/1/8517

The other two unknown SMART attributes, 178 and 235, are still at 72/72/276 and 99/99/2, just as they were when the SSD was fresh out of the box.

[B.A.T]

Morning update:
237 hours, 69,87084 TiB, Wear Leveling Count and Percentage of the rated lifetime used has gone from 62 to 60.
Avg speed for all 237 hours is roughly is 85,87 MiB/s

[Ao1]

Hi Vapor, any chance of showing the writes that have occurred following notification that the MWI is exhausted? Maybe a hatched extension on the bar in the MWI Exhaustion graph?

I'm surprised at how much the Samsung 470 has been able to write after MWI exhaustion. At this rate it will be able to double the amount of data it took to exhaust the MWI.

Is anyone else going to getting a SF2xxx drive to test? If not I might pick one up. One "hacked" and one with throttling enabled would be interesting.

[Anvil]

Looking at info I could find on the web....

I'll find out on mine as well, just need to get an opportunity to power down for a few minutes.
+
^ look in your PM.

190.5TB. 1%. Still 19 sectors.
I've reached the magical point except the SSD clearly doesn't care.

I'll try to get a special build for you later today, in order to find that special SMART attribute for reporting wearout.
I've figured out the Host writes on the 320 series using totally undocumented vendor specific info returned by WMI.

--

149.40TB Host writes
MWI 18
Reallocated sectors : 6
MD5, all tests were OK.

@Vapor

A P/E count chart would be useful in general. (TiB written/capacity)

[bulanula]

Is nobody going to take out my offer and start testing endurance in terms of secure erases. This is just like writing the whole capacity of the SSD in a couple of seconds as it "zaps" the SSD NAND cells and resets them to 0. Anyone interested so we can see how durable this mechanism is and how many times it can be secure erased before it fails ??? Maybe an automated hdparm script or something. Anyone ???

This really is a valid point that also needs to be tested if we are talking about SSD endurance.

Or maybe test it on the V2 drive so we can see how many secure erases it can take if the standard endurance test failed because of throttling etc. ???

[One_Hertz]

^^

You need to repower the drive every time you do a secure erase. Nobody is going to sit there and do it.

[Hopalong X]

Is nobody going to take out my offer and start testing endurance in terms of secure erases. This is just like writing the whole capacity of the SSD in a couple of seconds as it "zaps" the SSD NAND cells and resets them to 0. Anyone interested so we can see how durable this mechanism is and how many times it can be secure erased before it fails ??? Maybe an automated hdparm script or something. Anyone ???

This really is a valid point that also needs to be tested if we are talking about SSD endurance.

Or maybe test it on the V2 drive so we can see how many secure erases it can take if the standard endurance test failed because of throttling etc. ???

It appears you have it covered.
Keep us posted on how your testing goes.

[Vapor]

Hi Vapor, any chance of showing the writes that have occurred following notification that the MWI is exhausted? Maybe a hatched extension on the bar in the MWI Exhaustion graph?

That was the intention when I first made it, thanks for reminding me

Anvil, do you mean a bar chart with P/E cycles? Or a bar chart with normalized writes? Unfortunately, only the Crucials, the Samsung, and the SandForce show anything directly related to NAND writes (and therefore P/E cycles).

C300 update from earlier today, didn't have a chance to post.

29.971TiB, 90 MWI, 505 P/E cycles, 61.8MiB/s, ~240/0 MD5 runs/mismatches

[B.A.T]

Eveningupdate:
248,5 hours, 72,6775 TiB, Wear Leveling Count and Percentage of the rated lifetime used has gone from 60 to 59.
Avg speed for all 248,5 hours is roughly is 85,18 MiB/s (avg has gone down some due to 30 min of win update)

[Anvil]

Anvil, do you mean a bar chart with P/E cycles? Or a bar chart with normalized writes? Unfortunately, only the Crucials, the Samsung, and the SandForce show anything directly related to NAND writes (and therefore P/E cycles).

No, I meant "Host writes" / Capacity, which can be used by all* drives and it should be pretty close to the P/E count for the Intels.
(all drives if using the running total option)

We will need something as the counters stops telling what's going on and that time has come for the 320, unless we find some way to get to the other wear-out counter, it would still leave the X25 series out in the cold as there is no extra wear-out counter.

It's not much but it's something.

[johnw]

102.957 TiB, 290 hours, sa177: 1/1/8517

110.000 TiB, 309 hours, sa177: 1/1/9123

The other two unknown SMART attributes, 178 and 235, are still at 72/72/276 and 99/99/2, just as they were when the SSD was fresh out of the box.

110 TiB comes to 66.2 GB per day for 5 years. So the Samsung 470 64GB SSD has passed the milestone where you could have written the entire available capacity of the SSD, 64GB, each and every day for 5 years.

[johnw]

Is anyone else going to getting a SF2xxx drive to test? If not I might pick one up. One "hacked" and one with throttling enabled would be interesting.

The 60GB Corsair Force GT is $145 on newegg ($155 - $10 for promo code HARDOCPX7X6D until 7/12)

http://www.newegg.com/Product/Produc...82E16820233193

[dr_sharp]

The tester chose to stop testing but the drive was still functioning as intended

I completely disagree with that statement. Nobody buys an SSD to run at those speeds. For all intensive purposes, it experienced failure.

[B.A.T]

261 hours, 76,4858 TiB, Wear Leveling Count and Percentage of the rated lifetime used has gone from 59 to 57.
Avg speed for all 261 hours is roughly is 85,35 MiB/s

[Anvil]

110 TiB comes to 66.2 GB per day for 5 years. So the Samsung 470 64GB SSD has passed the milestone where you could have written the entire available capacity of the SSD, 64GB, each and every day for 5 years.

Impressive, and it's not done for yet.

Wonder when they release the 27nm drives, hopefully they'll include more SMART attributes.


--

152.06TB Host writes
MWI 17
Reallocated sector count 6

MD5, no issues.

[bulanula]

^^

You need to repower the drive every time you do a secure erase. Nobody is going to sit there and do it.

Maybe somebody could setup a sort of script like this or something with an old unused device etc. ???

[One_Hertz]

198TB. 20 reallocated sectors. Md5 OK. Anvil - I will try your new app tonight to see if I can get that SMART attribute.

[B.A.T]

There was something wrong with xs last night so here are the numbers from yesterday evening:
273 hours, 80,1158 TiB, Wear Leveling Count and Percentage of the rated lifetime used has gone from 57 to 54.
Avg speed for all 273 hours is roughly is 85,47 MiB/s

This mornings numbers are:
283 hours, 83,1993 TiB, Wear Leveling Count and Percentage of the rated lifetime used has gone from 54 to 53.
Avg speed for all 283 hours is roughly is 85,63 MiB/s

[johnw]

110.000 TiB, 309 hours, sa177: 1/1/9123

118.719 TiB, 332 hours, sa177: 1/1/9774

The other two unknown SMART attributes, 178 and 235, are still at 72/72/276 and 99/99/2, just as they were when the SSD was fresh out of the box.