Search results for query: QLC

Please don't replace them with a 4TB QLC SSD that looks like a good deal; you'll get into the same kind of troubles. People refuse to believe that they wasted their money to only get single-digit KB/s (sustained) writes and time-outs and errors with ZFS, but it has happened multiple times before...

...even the cheapest SSD outperforms any HDD, but yeah it would help. You were basically testing sustained sequential writes. Extremely old SSDs and QLC SSDs offer worse numbers than a HDD when they ran out of pseudo cache. But on the IOPS front, even your 750 is way faster than any modern HDD.

...it to manage fast write speeds for general use and short bursts of data transfer. However, when the SLC cache becomes full, the drive switches to QLC NAND for caching. While this ensures continued operation, the write speeds may decrease significantly, particularly during large file transfers...

Yes, it really sad for the people that have those drives to always find out after buying them. And it's take an unexpected amount of effort to convince them. However, I have not seen your specific issues with your kind of setup. And I do think it could well be bad memory (since your RAM and...

Will do @leesteken thanks. I have already order a temporary drive (tlc nand) to test and if everything is find I will invest in an enterprise level drive. QLC is really bad but I did not realize that it could be so bad..

...this would give (write) errors/time-outs for sure (on the host). On ext4/LVM, I would expect writes dropping to tens of KB/s but not errors. QLC flash becomes much slower than old HDDs (maybe even like old floppy speeds) when doing big/sustained writes. Eventually, it takes longer than some...

Hi @leesteken, no errors on hosts at all. Host is only being slowed down and then recovers after a while. Only the VMs are affected. Some need only reboot, some need to be restored from backup since they are getting so corrupted that can not even boot afterwards. But this only happens when I try...

The BX500 has terrible write performance and is slow but should not give errors (except time-outs with ZFS because of the use of QLC flash). You are getting real I/O errors (on the host). It could be a drive or cable or controller or memory or motherboard or CPU issue. Try replacing each part...

Avoid QLC drives, which are worst than HDD as they have not predictible performance. Crucial MX models are little better, but there is plenty of recommended drives. Cheapest are not recommended. Datacenter models are recommended, like Kingston DC (easy available), or even second hand is better...

In den Crucial P3 Plus wurde QLC Flash-Speicher verbaut, kein TLC, kein DRAM und kein PLP. Suche bitte mal im Forum nach diesen Begriffen. Ich denke die anderen Admins werde Dir noch weitere Tipps geben können.

...mit Snapshots) ungeeignet sind. Ferner habe ich gesagt, was die Bedingungen sind, die einer Abnutzung der SSDs entgegenwirken, nämlich: - kein QLC - hoher TBW-Wert >= 2000 mal Überschreiben - RAM-Cache Ich habe auch gesagt, dass die Platte des OPs diese Bedingungen nicht erfüllt und...

...die Consumer-Festplatten in dem Raiddrive Pool ist, ist dass die NVME CT1000P3SSD8 im rpool eine Crucial P3 ist, also ein Consumer-Laufwerk mit QLC NVRAM. Da frisst sich ZFS durch wie durch Butter, was den Fehler auch sehr gut erklärt - der Fehler ist ja dort, nicht auf den Festplatten! Ich...

Crucial P3 Plus is a consumer drive but even worse: it uses QLC (please search the forum a bit). Make sure to update the motherboard BIOS because 13th and 14th gen Intel will develop problems otherwise (as hardware reviews will show you). 6 cores and 32GB might feel a bit minimal once you start...

Ja, aber die Schnittstellenleistung spiegel sich doch auch in der Datenübertragung auf dem Server / Proxmox wieder und wenn da nur M.2 NVME dranhängen dann fliegt da doch die Kuh oder? :) Ja, so kann es gehen.

Das ist aber nur die Schnittstelle. Wenn da dann zB. eine QLC-NVME mit SLC-Cache dranhängt, schaut die reale Geschwindigkeit gaaaanz anderes aus. Edit: Ich hab hier einen PBS am laufen, den ich ursprünglich mit einer Samsung 870pro SSD (ext4) gebaut habe. Nach ein paar Wochen bin ich dann auf...

...meist abgelehnt .. Das Forum ist voll mit Beiträgen, dass man zfs nur bei Server-Datenträger mit PLP verwenden soll. Edit: Ich hab leider auch nur WD-770 NVMEs (immerhin TLC, nicht QLC wie die meisten Intenso) im Einsatz, und deshalb kein "zfs". WearLevel nach knapp einem Jahr noch bei 0%

...(or maybe three) virtual cores! Maybe your network is running a 100Mbps for some reason and it therefore gives slow screen updates? Your BX500 QLC drive is terrible for VMs, please use enterprise SSDs with PLP to handle multiple VMs at the same time (especially when using ZFS). Giving a VM a...

...data to iSCSI at 10Gbps, typically Drobo/QNAP etc cheaps out on an embedded grade 2 or 4 core CPU and will sell that same model for a good decade. How many disks are you spreading the load on etc, 6 VMs on a single (or mirror) SSD is pretty much the maximum for your average datacenter grade QLC.

...have Proxmox installed to / use for data? SMR might be killing your performance, and Heaven help you if you're using something like a BX500 or QLC SSD. Both are absolute dumpster-fire level crappy tech How you have things configured on the virtual side also matters, you should be using...

...related to storage type, so I still don't understand. I mean that you are not using enterprise SSD with PLP but are probably using a consumer QLC SSD drive. I think 512MB or 1GB is enough but just test it yourself for your workload. Since you stated that the minimum for the VM is 4GB, I...