The performance per Watt is way better, you get more bang for your buck while using less energy to do it.Newer is more aware of power usage
The performance per Watt is way better, you get more bang for your buck while using less energy to do it.Newer is more aware of power usage
Now you have to keep an eye for 3 more. That way replace one, resilver, replace another, resilver.....eventually you have replaced them all and expanded poolI have six 4tb disks in my ZFS2 and out of space. Movie server.
Bought three 18tb disks on sale before AI raped the pricing. Those are Unobtanium today due to ghastly high prices.
At my age I am content with what I have which will still last a long time. Yesterdays big Xeon is perfect for workstation with plenty of muscle.
Memory costs rocketing also applies, to a somewhat lesser extent, to spinning rust platters. Driven by increasing density and reducing cost for the consumer market (even the pro-sumer one) drive manufacturers came with this "artefact" that is named SMR; manufacturers were even hiding this important property from their customers. When selecting a HDD you may be not aware of, or overlook this aspect. See also here. Recently (Jan 2026) an OpenZFS issue has been opened: Docs: Add prominent warning about drive-managed SMR HDDs (CMR vs SMR) for RAIDZ/mirror resilver/scrub/send workloads*.I have never been into "storage".
My understanding of it is basically there are mechanical spinning disk drive and some based on memory chips (faster and more expensive, especially now). And that ZFS is awesome.
I am now feeling the need for a NAS for the first time in decades but I have little idea how to approach this in regards to the rocketing cost of memory.
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The ISSUES with SMR HDDs was on the agenda already 15 years ago.Memory costs rocketing also applies, to a somewhat lesser extent, to spinning rust platters. Driven by increasing density and reducing cost for the consumer market (even the pro-sumer one) drive manufacturers came with this "artefact" that is named SMR; manufacturers were even hiding this important property from their customers. When selecting a HDD you may be not aware of, or overlook this aspect. See also here. Recently (Jan 2026) an OpenZFS issue has been opened: Docs: Add prominent warning about drive-managed SMR HDDs (CMR vs SMR) for RAIDZ/mirror resilver/scrub/send workloads.
My strong advice for a ZFS based set up: do not use SMR drives!
(I suggest you do not use them at all.)
Perhaps one can tolerate the performance loss under "normal running" circumstances, they are absolutely desasterous for the resilvering process. A defective HDD transforms a ZFS pool with redundancy to a pool with less or no redundancy: a degraded state. When the defective drive has been replaced by a new one, the process of resilvering starts and you wil be confronted by the difference between SMR and CMR drives.
I have no more SATA ports.
Have lots of disks though.
So for my edification, in relation to SMR drives what is "used correctly" vs "used wrongly".SMR drives are GREAT, when used correctly.
The big psychological / sociological problem with SMR drives is that people bought them and used them wrong,
zpool scrub.Incorrectly: If you know that you are using SMR disks, and you know that your file system is not SMR aware (or not highly modified for using SMR), then don't quickly modify and delete small files. Correctly: Write large sequential files (where "large" is with respect to the 256 MiB SMR zone size). Now this is clearly not an option for most people, since their file system layout and read/write/delete ratios and file sizes can't be easily changed.So for my edification, in relation to SMR drives what is "used correctly" vs "used wrongly".
I use ZFS typically mirror pairs, default block/stripe sizes, home use so mix of development (so smaller text files), photo editing, some streaming media.
I have trouble correlating that to "good/bad" on different devices.
My recollection is somewhat less sympathetic to the manufacturers, especially Western Digital, who had always sold Reds as NAS drives. They switched Reds from CMR to SMR in certain common capacities and failed to mention the change. I viewed that as active deceit by WD, not customers choosing to "use them wrong". WD later back-pedaled and brought back the CMR drives (beside the SMR drives in the product line) with clear labels identifying the products, and appropriate technical descriptions. But they only did that after after some "extremely negative" feedback from the customer base.The big psychological / sociological problem with SMR drives is that people bought them and used them wrong, and then were surprised by the bad performance. It doesn't help that neither the manufacturers nor the channel explained to consumers how they are different from the old-fashioned CMR drives. Nor that some file systems and some usage patterns work great on them, others horrible, and usually in between.