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SMR Drives compatible with Drivepool ?

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Western Digital has started to use a version of SMR Hard Drives in their Series of WD Red Hard Drives,  long a favorite of home built servers and NAS enthusiasts

https://blog.westerndigital.com/wd-red-nas-drives/

There has been considerable concern about SMR drives  -  especially used in a RAID -  problems during rebuilding specifically

I see some discussion here  in the past on SMR Tech hard drives and Drivepool -    What is the current thinking ?    

My thought is that Drivepool  ,especially with SSD cache enabled, should be more tolerant of drive types ?  -  Correct

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No issues.  I've been using SMR drives personally since Seagate released the Archive drives.  And I have a pool of mixed drives.  WD Reds, Seagate NAS, Seagate Archive. 

The only caveat is that the SMR drives have a "write cache" of non-SMR space. If you fill that (fairly easy to do so), the write speeds get atrociously slow.   Because of this, I would recommend using the SSD optimizer, to effectively bypass this issue.  Doesn't matter if balancing is slow, since it is  any ways.

In fact, that's the setup that I have (for years now), and it works wonderfully. 

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On 4/28/2020 at 2:23 AM, Christopher (Drashna) said:

...I would recommend using the SSD optimizer, to effectively bypass this issue.  Doesn't matter if balancing is slow, since it is  any ways....

Is there a user guide for SSD Optimizer so I can set it up correctly ?

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