Search results for query: QLC

...choice for running VMs (as several threads on this forum will explain in more detail), especially with only 3 drives. If those drives are QLC SSDs then you might as well give them away (as many threads on this forum will explain in more detail) as modern HDDs will perform better under load.

...its even worse, because as the MX500 Camed out first, they were TLC based and were undestroyable almost, but they changed mid Production to QLC and the same MX500 Drive got absolutely worst piece of crap. You can only Distinquish the good from the bad ones by the Firmware Version. The good...

Laut Screenshot ist es eine rotierende USB-HDD ... Möglicherweise ein schlechtes USB-Kabel, weswegen sich das USB-Protokoll von USB3 auf USB2 geändert hat (reine Vermutung).

...I recently heard about folder2ram. And you can leave extra unused space at the end of the disk. But still, don't buy stuff like Crucial BX - or QLC crap with low TBW ratings. You can also relegate vm disks that don't need ssd-speed to spinning disk. All depends on how good your sysadmin...

...you don't mention hardware details, so it's kinda hard to advise. But yah, if you've got something like a WD Blue or a Crucial BX or (God forbid) QLC for backing storage, your life as a sysadmin is not going to be easy. There's a reason for the serious recommendation being: Use...

...to write directly to a full nand. for example, you need to write 4k, it'll write a full nand of 32MB (size of nand depend of the ssd, mlc,tlc,qlc , model ...). That's overamplification. that's why you'll have 200iops vs 10000~20000 iops for an ssd with a PLP. with a plp, the sync write...

Does the destination drive use QLC flash memory or SMR? Then is can take a long time for the writes to actually finish.

...drive could report that the data is written faster - while it is still writing. This gets you less SSD degradation, too. - Some SSDs are using QLC cells. If you are using QLC, the data will be written in an SLC cache. If this cache is full, write speed will degrade down to something like 10...

Thanks, My connection speed is 1 Gbps, but noted that one of my friends is using traditional HDDs for a home server, and still getting speeds around 100+MB/s, is that what you are referring to as slow or even slower because I am not quite sure about it, but the speed around 100MB/s is fair...

...data, but their maximum speed on their very best day is still pretty slow. That being said, they don't have the same kind of pausing issues that QLC drives do. Instead, they're just slow for everything. :rolleyes: For some stuff (maybe watching a movie) that's completely fine though. For...

Thanks, but how does one check if it is a QLC or not when buying an SSD, and can I overcome this issue by switching to a traditional HDD?

Ahhh. That model of drive "WDS2TB2G0A-00JH30" is the problem. That's one of the "QLC" drives (a type of flash) that people have been mentioning in the previous posts. Western Digital is super dodgy about putting that info in front of customers where it'd be useful (before they buy). As an...

TRAN NAME TYPE SIZE VENDOR MODEL LABEL ROTA PHY-SEC loop0 loop 74.2M 0 512 loop1 loop 103.4M 0 512 loop2 loop...

That behaviour sounds a lot like what happens with QLC based SSDs when they run out of SLC cache. They go super, super slow until they've managed to internally process the data. That being said, maybe it's something else after all. Would you be ok to run lsblk -o...

but the issue came after re-installing the proxmox, the issue wasn't there before.

Not enough information to go on, but I would guess: don't use QLC SSDs.

Please carefully read the test. We are not benchmarking the "disk io" that is just an additional information. It's not about the speed of the disk - it's about the speed of the filesystem. What will you gain in a multipass? We see the local filesystem is 1.2seconds (for 65536 directories) -...

...there are some results that are probably not real and is masked by some cache (probably the drives): e.g. you get ~200000 20000 IOPS on a QLC ssd, i very much doubt that is sustainable, i guess there is some SLC cache or similar going on (which skews your benchmark) please don't use usb...

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...