Search results for query: SMR

Do you use consumer QLC SSD's by any chance (or maybe SMR HDDs, with raidz1/2/3)? Please let us know the make and model, and the raid setup if you use any, of the drives that are giving you trouble.

I do understand the wish for that, but currently we do not plan to spend resources on bad test results. We rather focus to showcasing what can be achieved with good hardware. We did not collect that information initially. I could offer to run a single benchmark and monitor the performance on...

What I'm always missing are some unrecommended disks. All the people who are running consumer SSDs, QLC SSDs or SMR HDDs and wonder why the performance is terrible. Would be great to also have those cases included as a bad example so people see what they will get when cheaping out on storage.

If I copy it manually, I don't get the speed drop 1159638958080 bytes (1.2 TB, 1.1 TiB) copied, 1539 s, 753 MB/s

That's usually because of disk caching. Especially when that NFS share is backed by SMR HDDs or QLC SSDs. Do you see the same performance drop then copying a 570Gb file to that NFS share?

WD Red's are often SMR drives that cannot handle sustained writes and give issues with ZFS. WD introduced Red Plus label for drives actually suitable for NAS (which people still disagree with but that's a different discussion). What model are they exactly? Maybe that's why writes are quickly...

On the other hand, SMR HDDs or thin-provisioned storages on HDDs require trimming too.

There is definitely a pro-sumer price uplift for those NAS disks. "WD Reds" (not the Plus or Pro) are crappy SMR HDDs and every cheap consumer CMR HDD would be a way better choice for a NAS. Thats like selling QLC SSDs but asking for TLC SSD or even MLC SSD prices.

If you care about your data + you got enough RAM + those HDDs are all CMR and not SMR + all disks are attached to an dumb HBA or onboard disk controller and not a raid controller, then I would use ZFS for the raid. But then I also would buy 2 or 3 enterprise SSD to help your HDDs as mirrored...

...Fehler erkennen, weshalb ein langer Test nicht unbedingt nötig ist. Was aber an der 6 TB Platte auf jeden Fall zu beanstanden ist, es ist eine SMR und keine CMR Platte, das kostet Performance - ich würde solche Platten aus Prinzip nicht verwenden. Womöglich könnte das auch ein Problem sein...

No, TrueNAS only uses ZFS, disks need to be wiped and ZFS shouldn`t be used on top of a hardware raid and shouldn't be used with SMR HDD (so check that those are actually CMR). It's fine. But dedicated disk for PVE system would be preferable if money, slots and ports doesn't matter. See the...

...batch or they have problems in firmware that should be updated or maybe they were dropped once too often or maybe the system case vibrates too much? It looks like WD20EFAX are SMR drives and those are problematic with ZFS, but it would expect write errors (because they take too long to write)...

...a 3 Stück. und diese beiden Pools hast du gespiegelt oder? Also liegen deine snapshots direkt im rpool? Das ist irgendwie seltsam ich hab damals 6 gleiche Festplatten bestellt. Schauen auch gleich aus, sind aber anscheinend unterschiedliche Modellreihen der Serie. 4 sind CMR und 2 sind SMR.

Noch eine Anmerkung, bitte überprüfe die Speichermethode. SMR oder CMR (das willst Du)

Maybe your disks or something similar just can't handle the load? Not unusual when for example using SMR HDDs or even cheap SSD (QLC, ZFS on consumer SSDs etc).

ballooning ist aktiv. Guest Agent ist auch aktiv. Als Festplatte wird eine Crucial MX500 SSD verwendet, die sollte das doch ohne Probleme schaffen. Im Synology NAS sind zwei WD Red 3,5 verbaut. Ich will eigentlich weg vom Synology Nas und alles in einem Server haben. Stromverbrauch, Platz...

...guck mal ob nur das Schreiben auf die OMV langsam ist oder auch das Lesen. Wenn es nur das Schreiben ist, dann ist deine Disk vmtl. einfach lahm weil QLC SSD oder SMR HDD? Das ständige hoch und runter liegt dann am Schreibcache, weil die Disk nicht nachkommt und lahmer ist als deine Gbit NIC.

Okey, I tried with zpool clear and I saw almost all Drives online again, but afterwards it turned back to same state. Is there anyway to safe the data out? Now when I restart the Server it's stuck and this position: What can I do now? I have some important Backups there :confused:

seems like that might be the clue that you are using SMR and not CMR drives.

1) check the disk models whether they are CMR or shingled(sp?)/SMR - the Shingle drives (typically those with like 128MB-256MB or more RAM/cache) are known to break horribly with ZFS 2) personally, I'd rather setup a DRAID2 or a RaidZ3 given your number of disks *AND* have SSD/NVMe SLOG and...