SSD Write Endurance 25nm Vs 34nm

[Christopher]

Samsung 830 256GB Day 237

(GiB) 5,887,996
(TiB) 5,749
(PiB) 5.65


(Avg) 298.72 MB/s over the past 2000+ hours

(B1) Wear Leveling Count: 25,454

(B5) Program Fail Count: 0
(B6) Erase Fail Count: 17
(B7) Runtime Bad Block Count: 134
(05) Reallocated Sectors: 548864

Read Failures: 117

(POH) 5752

-------------------

It's chugging along still.

[Anvil]

Shipment confirmed on a few 840 Pro's. (not meant for endurance testing though)

I'll be ordering a few non Pro's for testing, that is, if no one else had planned on testing the TLC's?
(anyways, testing more than one of these drives wouldn't hurt)

So, they are rapidly getting available in these parts of the world.

[B.A.T]

@Anvil
The TLC 840 sounds exciting There'll be no more drives for me before I get enough sparetime to fix the two that's been waiting the last couple of months. Looks like that won't happen before december.

Here are todays update:

m4
1945.4780 TiB
7983 hours
Avg speed 73.28 MiB/s.
AD 18 to 8.
P/E 33500
C3 247252828 to 337721144
01 82343 to 118725 (1)
CE 90
MD5 OK.
Reallocated sectors : 00


Intel X25-E 64GB
1.31 PiB
4447-30=4417 hours
Reallocated sectors : 205 to 255 to 5
Available Reserved space: 62 to 61
MWI= 91
MD5 =OK
78.41 MiB/s on avg


Mtron Pro 7025 32GB
Paused until new firmware is updated.

OCZ Vertex 1 120GB
Will start after an update to the latest firmware.

[canthearu]

Anvil, waiting for the 120gig 840's to become avaliable. Other options include the intel 335, corsair neutron and plextor m5 pro.

[canthearu]

I've ordered a samsung 840 TLC 120gig and a Plextor M5 pro 120gig

Will decide on the Plextor's fate after I play with it a bit .... but the 840 will burn

[Anvil]

OK

I might join in on testing the 840 at some later point, depending on your results.

The Pro's should be here by tomorrow, I'll play some on a PCIE 3.0 controller (9207) thats been sitting in it's box for a few months.
(A real shame that there has been no time to play)

[Chrysalis]

My 830's CRC Error count is actually 2. It's actually a SATA error count. Mine increased when another drive I was testing died.

that softens it up a bit, as mine is now on 130 now. Although I got no idea why its going up. 641 gig written to drive. 15 /p/e cycles done.

[Christopher]

I've got a few of the new Sammies in 120s, but not sure what I'm going to do with them yet.

[canthearu]

Christopher: Someone has to help me work out if these samsung 840's are any good!

[Christopher]

Christopher: Someone has to help me work out if these samsung 840's are any good!

I'm impressed with the read speed. To be certain, the write speed is not in the 830 's class, but considering TLC has seven guard bands and 8 voltage levels, I think it's a miracle it works at all! It's still supposed to be 3K PE cycles (I think) but the MWI is based on 1K PEs.

Sequential and random reads are significanty better than the 256GB 830, while write speed is worse than the 64GB 830. All writes are limited to about 130MB/s. All in all, I'm incredibly impressed -- it's faster than many of the SLC drives I have, and I don't just mean the MTRONS.


------

THe 830 is up to 12.5 trillion LBAs written. It's not significant in any way, except it sounds like a whole lot.

[canthearu]

I've just received my samsung 840 120gig .... Will have a play with it later.

I don't think i'll be able to part with the M5 Pro yet ....

[canthearu]

Christopher ... I'm impressed with the read performance of the samsung 840 as well. It is certainly the match of any normal MLC drive.

Anyway, time to get down to business ... to start off with, some benchmarks for the samsung 840:




Read performance is fantastic .... easily as good as any SATA 6 drive I've seen.
Write performance, while not as good, is still as good as your average 120gig sandforce drive .... which really is plenty for the tasks it needs to do.

[canthearu]

Initial smart values



Still plenty of juicy data there!

[Anvil]

I benched the Pro's last night (128GB and 256GB), will be posting tonight in the Storage forum.

The Pro's are rather nice

[canthearu]

Drive Details:

Make: Samsung
Model: 840
Capacity GB: 128 GB
Interface: SATA 6Gb/s
Controller: Samsung MDX
NAND maker: Samsung
NAND process: 21nm TLC
NAND part#: unknown
NAND P/E spec: 1000 cycles
NAND type: Toggle Mode

Testing Environment:

OS: Windows 7 x64
Hardware Platform: Intel 1155 Z77

Test Details:
Static Data: 39.2 GB
Over-Provisioning: 0 GB
% Compression: 46%

ASU Endurance test Started:

[Christopher]

There is a problem with some 840s and LBA writes ; right now, F1 won't increment past 2.04TB and may reset with power cycles. It's hardly a big deal, so if you see it, don't think you're going crazy.

[Zaxx]

Anand just did a write up re: 840 endurance and noticed this too...decent little read. This thread is linked as well.

http://www.anandtech.com/show/6459/s...ce-of-tlc-nand

[canthearu]

There is a problem with some 840s and LBA writes ; right now, F1 won't increment past 2.04TB and may reset with power cycles. It's hardly a big deal, so if you see it, don't think you're going crazy.

Yeah, I'm seeing this bug.

The Anandtech Samsung 840 TLC died as well, right after the article was written. Not something I really expected from samsung. I'll probably retention test my 840 every couple of weeks.

The 840 pro seems to be seeing a number of failures under high load as well.

[Zaxx]

Time to start hammering out fw updates...I'm sure they've already begun.

[Christopher]

It's cool that Mr. Vatto gave the 830 a shout out, but it actually has 5,850TiB on it at the moment, not the almost 5,000TiB he mentions.

Based on my calculations, a 120GB 840 should hit MWI 1 around 126TiB (under the endurance test). It's definitely spec'd for 1K PE cycles.

[B.A.T]

Here are todays update:

m4
1965.0628 TiB
8062 hours
Avg speed 73.19 MiB/s.
AD 8 to 1 to 255 to 253.
P/E 33836
C3 337721144 to 456606202
01 118725 to 167920 (1)
CE 90
MD5 OK.
Reallocated sectors : 00


Intel X25-E 64GB
1.33 PiB
4526-30=4496 hours
Reallocated sectors : 5 to 79
Available Reserved space: 61 to 59
MWI= 91
MD5 =OK
78.04 MiB/s on avg


Mtron Pro 7025 32GB
Paused until new firmware is updated.

OCZ Vertex 1 120GB
Will start after an update to the latest firmware.

[canthearu]

Samsung 840 Day 1

Drive Hours: 26
ASU GiB Written: 7,458.54
Avg MB/s: 111.06 (15.52 hours)
MD5: OK

Wear Leveling Count (B1): 59 raw (94 normalized)

Reallocated blocks (B3,05): 0 (0 sectors)
Failure count (B5, B6): 0 program, 0 erase
Uncorrectable Error Count: 0
ECC Error Rate (C3): 0

Drive is chugging along fine .... One thing I've noticed is that TRIM occurs quite quickly and it always gets in it's 100meg of writes after each cycle (other drives often stalled right after all that TRIM and didn't recover quick enough to handle all 100meg of random writes before it timed out)

[canthearu]

Samsung Magician Lifetime Indicator:

[canthearu]

Samsung 840 Day 3

Drive Hours: 75
ASU GiB Written: 23,882.93
Avg MB/s: 108.04 (11.4 hours)
MD5: OK

Wear Leveling Count (B1): 191 raw (81 normalized)

Reallocated blocks (B3,05): 0 (0 sectors)
Failure count (B5, B6): 0 program, 0 erase
Uncorrectable Error Count: 0
ECC Error Rate (C3): 0

[Christopher]

I've been waiting for the 830 to hit 6PIB before posting another update. Shouldn't take too much longer.