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Running multiple 1.5T 905P's with Startech adapter above. At least with that drive, on that adapter, as long as some fan is moving air over it, there are no problems with thermals.

Intel/Solidigm 5336 and 5316 are not exactly the fastest drives due to them being QLC. In fact 5316 is slower than good SATA SSD in random 4K writes and that might become a problem, if You have multiple threads writing many files, that need syncing, metadata updates etc, each of those writes...

I would not care about write amplification at all. Setup classical 6 SSD drive RaidZ2 and thats it. For bulk storage, the fact that ZFS writes data twice (in fact due to bulk writes, much less so) does not matter at all. The users that killed SSDs were abusing them with DBMS or some crazy VM...

And the same can be said about initial tests with FIO. Is screaming about the test where the following happens => 10GB of data is bursted into cache and then fsynced. So devices go from 0% to 100% utilization in bursts. The fsync in this case does not have to be explicit...

They do more in proper setup, for example 905P's 1.5TB connected directly to CPU PCIE lanes on X299 platform has the following: iops-test-job: (g=0): rw=randread, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=io_uring, iodepth=1 fio-3.33 Starting 1 process Jobs: 1 (f=1)...

That's what i mean by "vendor" magic, but i'd start with basics, like what LLM recommend: nvme create-ns /dev/nvme0 -s $(nvme id-ctrl /dev/nvme0 | grep tnvmcap | awk '{print $3}') -b 4096

What is the full command You are trying to execute? Sadly create-ns is usually riddled with magic, vendor specific things, might need to google deeper to solve them.

I think You need to start from "basics" of nvme devices. 1) Is there already namespace on device? from above we see this device supports one ns and that is perfectly fine: nvme list-ns /dev/nvme0 if it does, proceed to format it (will loose data) with format desired nvme format --lbaf=1...

Go to the: Cloud - SSD_FW

Thanks for clarifying this, I was too focused on indirections units. Still, it is completely not clear, why would device report its Erase Block size as physical sector size? Again, not expert here, but Erase block size should only come into play when running out of ready flash blocks to write...

I am not expert in this matter, but 256KB indirection unit would be huge. Aren't they TLC? For example P5316 is QLC drive and has 64KB indirection unit and that is already considered big (large? sorry not native english speaker here) for "enterprise" drive. The next generation P5336 moved to...

The problem is, to reach 128GB You pretty much need to run 4x32GB DIMMs and that in turn means running 2DPC with dual ranked memory, putting immense load on memory controller. For 2DPC with 2R mem I'd expect to run 5200 or maybe 5600 in best case. Threadrippers exist for a reason, they provide...

It means the command was run without root privileges. *WARNING* -> I would not proceed with any of the commands without absolutely being sure what they do. Complete data loss will happen if wrong nvme device is selected and so on. please seek knowledgeable person.

Any settings in BIOS to control split between PMEM and "mixed" space? Is ipmctl showing them as connected in the OS ( as pmem ).

An interesting topic about these Saphire/Emerald Rapids CPUs is impact of uncore speeds on performance and power usage. For example on Linux (where it is possible to control uncore speeds) and running 7zz benchmark: 1T CPU Freq (MHz): 3996 3995 3997 3997 3998 3998 3998 96T CPU Freq...

I think at these prices and customs taxes, one starts to wonder does it make sense to target 3-5DPW for SATA drive. pm893 is a 512e/4kn drive with 1DPW. for that level of taxes you can probably double the size of pool members, effectively moving to "virtual" 2DPW. And at the end of the day, I...

I can think of several things that could help or provide more visibility: 1) USB Device Tree Viewer -> can provide ideas of what and where is connected, maybe there are some problematic virtual USB devices hanging from BMC or something like that. From there, options are to disable whole ports /...

@John T Davis I was able to flash my PM893 only with Toolkit version 3.0, so it might be worth for You to try it, before going deeper into debugging the issue. What i did was download samsung tool, set it executable, enumerate my desired disk number and then flash it with latest ( at the time )...

Is smartctl returning the same, without 5 digits after? smartct -x /dev/nvmX where X is your device should show that info in lines at the top.

WOW, this forum and its users are incredible value. Thanks for nothing Samsung! The steps i took to update FW were: downloaded latest Samsung toolkit 3 Linux version as file samsung-tool chmod +x samsung-tool ./ samsung-tool -L | 0 | /dev/sda | SAMSUNG MZ7L37T6HBLA-00A07 |...