I read quite a bad opinions about SMR drives. What you think about use them in NAS?
SMR HDDs - any good?
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Depends on what and how they are being used, SMR drives require 'idle time' to function correctly therefore they should not be used in a Raid array or ZFS.
After this came to light on the forum I always check the manufacturers site before purchase, for instance Seagate list that information
Buffalo have this write up on their site.
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Depends on what and how they are being used, SMR drives require 'idle time' to function correctly therefore they should not be used in a Raid array or ZFS.
So, if I don't use RAID, I can buy them? Problem is, I can't find WD Red EFRX (nonSMR) disks...
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So, if I don't use RAID, I can buy them
If you read the Buffalo link this stands out;
CodeSMR drives shine when used for backup and archival purposes, as infrequent drive access allows stable drive performance at a lower cost
so with that in mind would you use SMR for day to day use i.e. constant file access and storage.
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Problem is, I can't find WD Red EFRX (nonSMR) disks...
WD does have EFRX Red series drives available, that are CMR.
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so with that in mind would you use SMR for day to day use i.e. constant file access and storage.
I plan to use them as backup drives. I already have my data drives in RAID.
I am confused with "infrequent drive access" term. I have Rsnapshot (OMV plugin) to make backup of my data once in 24 hrs.
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WD does have EFRX Red series drives available, that are CMR.
In my country they are quite rare
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I am confused with "infrequent drive access" term
The best way I could describe it "is not being used much" so if you are using them purely as a backup then the drive would only be in use during that process, the remainder of the time it would be idle.
What makes these drives attractive is that they are supposedly cheaper.
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These are two good articles:
This one shows why SMR has a bad reputation:
https://create.pro/why-the-dat…our-hdd-could-be-at-risk/
This one indicates that SMR is probably OK for your application:
https://www.ionos.com/digitalg…d-magnetic-recording-smr/
I haven't owned an SMR drive and have avoided owning one so far. But for the right price in a non-raid setup I would be open to using one.
In terms of "infrequent use", my perception is that is not measured in minutes or hours but more by non-sequential writes and the impact on performance, not reliability.
Following is a paper on the technology, which I have skimmed through but have not read:
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