Not specifically a model or brand. I would like to see stuff tested that's not overly expensive and by trusted brands like Intel, Crucial, Sandisk, etc.Got anything you want to see tested?
I'm testing the "SLOG underprovisioning" theory right now, I'd like those iozone commands if you have a good set.I can probably get some iozone commands for you so we can see how good/bad a given disk is for slog
iozone -r 4k -s 4G -i 0 -i 1 -i 2 -f -o /dev/adaX > /mnt/tank/testfile.txt
This has got me hopeful. $200 for 256GB and $350 for 512GB Samsung 950 Pro NVMe M.2 2280 form factor drives.Not specifically a model or brand. I would like to see stuff tested that's not overly expensive and by trusted brands like Intel, Crucial, Sandisk, etc.
I would be happy to test some stuff, pass them along! Gonna need some time to setup the 750 though, happy to afterwards.Not specifically a model or brand. I would like to see stuff tested that's not overly expensive and by trusted brands like Intel, Crucial, Sandisk, etc.
If you want to know what test to run I can probably get some iozone commands for you so we can see how good/bad a given disk is for slog and/or l2arc.
After the EVO and TLC...mishaps i'm leaning away from Sammy for SSDs. I own too many of their SSDs now and i'm not interested in more.
Warrantied write endurance != actual write endurance.guys I'm sorry but Intel 750 is specified to have 70GB/day/5yr warranty = 70 x 365 x 5 = 127TB write endurance (with suicide thoughts after that, probably "to play it safe"") whereas Sammy950 is specified to have 400TBW endurance for 512GB model and 200TBW for 256GB model.
In my books, that's blatantly better than Intel 750. Enterprise-designation or not, it's MILES AHEAD of Intel write endurance.
We have seen Intel SSDs committing suicide after "I feel NAND wears out", on the other hand Samsung drives withstood much more writes than they are specified for so it's pretty real that instead of 400TB, you'll be able to write 20000TB - remember 3D V-NAND with huge huge huge cells plus no suicide. Samsung said they have 128GB 850Pro models in their labs that sustained terribly more than 8000TB of writes and with 4x nm litography I have absolutely no doubts to believe that. 512GB models have 4 times more cells so they must withstand at least 4 times more writes. Intel750 has what, 19nm?
Make your own conclusions. I did.
Its enterprise roots are reflected in its performance, notably its performance consistency. That was what I was referring to.The Intel 750 is a Client based device. From Intel's spec sheet "Endurance Rating The SSD will have a minimum useful life based on a typical client workload assuming up to 70GB of host writes per day." Bolding is mine.
Compare this to a DC3700: "While running JESD218 standard1 and based on JESD219 workload (Refer to JESD218 standard table 1 for UBER, FFR and other Enterprise SSD endurance verification requirements. UBER design and majority of life target is 1E-17. Endurance verification acceptance criterion based on establishing <1E-16 at 60 confidence.) 100GB: 1.83 PBW 200GB: 3.65 PBW 400GB: 7.30 PBW 800GB: 14.60 PBW"
^^^^Even WITH a UPS, power loss protection in an SSD device used as a SLOG is needed.