Martin Gregorie  wrote:
> On Mon, 14 Dec 2020 09:15:10 +0000, druck wrote:
>
>> On 13/12/2020 19:13, Martin Gregorie wrote:
>>> AFAIK trim isn't supposed to do anything useful to a hard drive
>>> regardless of speed or capacity,
>> WD SMR drives support TRIM.
>>
> Useful to know.
>
> Next question: how to find out whether a WD hard drive is plain old disk
> SMR.

[snip]

> Is there any other site that would know/admit what type of drive is in
> these WD Elements sealed units?
>
>

It might help to check these:
https://www.truenas.com/community/resources/list-of-known-smr-drives.141/
https://itigic.com/smr-hard-drive-this-is-the-list-of-models/
https://nascompares.com/2020/04/16/your-wd-red-nas-hard-drives-might-be-using-s
mr-what-you-need-to-know/

But, for my Seagate, I found two sources, both from Seagate, that seem
to disagree. The first:
https://www.seagate.com/internal-hard-drives/cmr-smr-list/
implies all 2.5" Barracuda drives use SMR

The second
https://www.seagate.com/www-content/product-content/seagate-laptop-fam/barracud
a_25/en-us/docs/100807728a.pdf
reports "perpendicular magnetic recording", which implies not SMR.

I don't know which to believe.

If you find other references please post.

Thanks for reading,

bob prohaska

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