Search results for query: QLC

Naja, mit QLC-NAND hast du nur einen Bruchteil der Write Performance vom TLC-NAND. Gerade dann deutlich spürbar, wenn du die SSD voll machst und dann kaum freier Speicher mehr als SLC-Cache missbraucht werden kann. Wenn du zu viel schreibst und die SSD nicht mehr hinterher kommt, dann kann das...

Wie gesagt, hat nichts mit Samsung zu tun, sondern dass du am geizen warst und daher ne SSD mit billigem QLC-NAND geholt hast. Da sieht es bei anderen Crucial SSDs auch nicht besser aus, wenn die QLC-NAND nutzen. Sowas wie eine Samsung PM897 hätte super funktioniert. Aber die kostet halt auch...

...geliche Disks nutzen, da immer alles auf das Niveau der langsamsten gebremst wird. Ein Mirror über 2 NVMe (auch wenn Consumer nicht optimalist) wird brauchbar laufen. Machst du ein RaidZ, was noch deutlich mehr Overhead erzeugt und bringst eine QLC SSD ins Spiel, wird es garantiert unerträglich.

Mostly yes, but you suggested QVO drives, which are really bad for ZFS because of the QLC.

The original post states that the current Crucial MX500 drives are for Proxmox with 1TB Samsung Pro 860 drives handling the storage. Proxmox installs to LVM and has a light load on its disks unless you decide to try and oversize SWAP so that it has to page memory like mad.

Please search the forum for QLC drives and ZFS. People get really upset when they find out the money was wasted. And then they ask about good drives and you'll also find recommendations about (second-hand) enterprise drives with PLP.

...using Crucial MX500 that, while being a Consumer (Budget) SSD, still features (Partial) Power Loss Protection and is still based on TLC NAND, not QLC. The weird thing is that I am observing this Issue on TWO fairly-recent (relatively speaking) Nodes based on Supermicro X11SSL-F Motherboard...

Sorry, I didn't know that the model may have a big impact. I have the Exceria Plus G3 which I guess is not PLP as they do not have DRAM. To be honest, I just kind of read that everybody just goes for a raid configuration. I figured, it's because it would be way more of a hassle to replace a...

Why won't you simply share the make and model of the drives? Maybe they are perfect for ZFS (PLP) or maybe they are terrible (QLC). Do you need the most space available (and no redundancy) or did you buy two to use in a mirror (RAID1) to prevent the service from going down when one drive fails...

Also die Samsung ist eine Consumer SSD ohne PLP und mit QLC NAND was das langsamste ist, was man kaufen kann. Da muss das RaidZ am Krückstock laufen. Ich würde es mal versuchen aus den beiden NVMe ein Mirror zu bauen und die QLC NAND als Thin Pool für langsame Daten nutzen.

It's also possible that the drive is new and the manufacturer count backwards from 100%to 0. It's a QLC drive, so it will wear quickly and be slow(er than HDD's) often because it cannot handle prolonged sustained writes.

Thank you very much for the hint... checked it now also and its a QLC as you said. Since this is "just" a test system to setup some k3s cluster and playground for PoCs it might be ok from performance perspective. Toms Hardware tested the drive and is reporting 1.2Gbps write which is fair for the...

That looks like a QLC drive. Please search the forum for QLC and ZFS and you'll find people who cannot believe that performance is worse than a HDD and that they wasted their money. Those threads usually also contain suggestions for enterprise SSDs with PLP (for fast sync writes).

...Wi-Fi 6 AX210/AX211/AX411 160MHz (rev 1a) 03:00.0 Non-Volatile memory controller: Kingston Technology Company, Inc. Design-In PCIe 4 NVMe SSD (QLC) (rev 03) 04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cezanne [Radeon Vega Series / Radeon Vega Mobile Series] (rev...

...Once that cache is full, their performance tanks hard, and then you get the performance of their main cells, which are the way slower TLC or QLC cells. The performance of QLC is especially bad, usually dropping down to HDD levels. Additionally, Consumer SSDs don't offer Power-Loss-Protection...

I finally found 2x Samsung PM9A3 960gb on Ebay, looks like samsung are the only entrprise nmve there... Should arrive in a few weeks. Let's see ! Ah yeah, googled my current drive and it is QLC....

...that is still working. No guarantees though, as every brand/model can have an unlucky production run. EDIT: All this has been discussed before on this forum but I don't know the magic keyword to find those posts. Maybe search for QLC as those threads always contain an answer to your same...

...handle the many writes that Proxmox does (and maybe overheats?), or there is an underlying problem with the PCIe bus or M.2 connector. Maybe check for a firmware update for the device (and/or motherboard) and/or test with a different (enterprise) NVMe drive (make sure not to use a QLC drive!).

Yeah, you are correct. They are WD SN770's. Honestly, with this being a testing environment and all we didn't consider this to be making such an impact. Afaik these 770's don't have any cache at all.

...periods of time. usually consumer ssds are plenty fast for as long as their pseudo-slc cache lasts and then the speed breaks down. in case of qlc ssds below the speed of harddrives. additionally consumer ssd's dont have powerloss protection, which means they cannot cache any sync-writes at...