[SOLVED] How to tell if a HDD is SMR or CMR

[SockPuppeteer]

Hello,

I am considering purchasing the Exos X16 HDD:

https://www.newegg.com/seagate-exos-x16-st16000nm001g-16tb/p/1Z4-002P-015K6

But I am unsure if the drive utilizes shingled magnetic recording or conventional magnetic recording. I would prefer CMR. I have read the datasheet:

https://www.seagate.com/www-content/datasheets/pdfs/exos-x16-DS2011-2F-1909US-en_US.pdf

But I cannot find any indication which type of recording it is. The datasheet for the X18 series clearly indicates that it is CMR but the X16 sheet does not. Does anyone know which type of recording the X16 drives use? If so can you please explain how you know? Is the information located somewhere on the datasheet and I am simply not seeing it?

Thank you for taking the time to read my inquiry.

 

[thx1138v2]

Recording method: Perpendicular which I am assuming is "shingled."

https://www.seagate.com/www-content...e-hdd-fam/exos-x-16/en-us/docs/100845789f.pdf

2.3 Recording and interface technology

 

[Newtonius]

It uses PMR technology, which is similar in performance with CMR and allows an increase in density storage. It is NOT SMR just to let you know.

PMR, SMR, CMR, I-just-want-a-hdd-MR – nullteilerfrei

 

[SockPuppeteer]

Thank you both for your replies, I am still a little uncertain on which recording type is being used. Based on the information provided in both posts it seems all that can be ascertained is that the HDD uses perpendicular recording instead of longitudinal but that perpendicular itself is ambiguous and could refer to either SMR or CMR. Is there anyway to be certain?

 

[fzabkar]

PMR has nothing to do with CMR or SMR. A drive can be both PMR and SMR, or PMR and CMR.

Basically, PMR tells you how the bits are recorded, while CMR and SMR tell you how the tracks are recorded.