It is not PMR that's new to toshiba, it is the 9th generation of it.
Toshiba were rather low key player and only recently stepped up their efforts, offering some larger capacity models, Which is good in a market that has close to no competition in it, but reliability remains to be seen, for the time being it is a tad dubious considering the pricing.
I know. I'm just saying the media (Anandtech and others) use PMR to indicate that a drive is non-SMR, but that's not the proper usage of the term. Because SMR drives are also PMR.
That looks strange to me as well. With 2.5" platters the outer regions flatter less than with larger ones, so heads can work more precisely. Apart from that I can not see any reason why their achievable densities would match and cross over.
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takeshi7 - Monday, November 20, 2017 - link
Every modern hard drive is PMR, even the shingled drives. Non-SMR drives are called CMR for conventional magnetic recording.ddriver - Tuesday, November 21, 2017 - link
It is not PMR that's new to toshiba, it is the 9th generation of it.Toshiba were rather low key player and only recently stepped up their efforts, offering some larger capacity models, Which is good in a market that has close to no competition in it, but reliability remains to be seen, for the time being it is a tad dubious considering the pricing.
takeshi7 - Tuesday, November 21, 2017 - link
I know. I'm just saying the media (Anandtech and others) use PMR to indicate that a drive is non-SMR, but that's not the proper usage of the term. Because SMR drives are also PMR.DanNeely - Tuesday, November 21, 2017 - link
With WD ending R&D, is this the end of the era for 10/15k drives or does Seagate have a final generation in the works?rpg1966 - Tuesday, November 21, 2017 - link
That first chart... why would GB/platter for 2.5" drives match that of 3.5" drives by 2019/2020 (or ever)?Does that imply that investment in the larger platters is expected to tail off, with data centres and maybe laptops going largely with 2.5" drives?
MrSpadge - Tuesday, November 21, 2017 - link
That looks strange to me as well. With 2.5" platters the outer regions flatter less than with larger ones, so heads can work more precisely. Apart from that I can not see any reason why their achievable densities would match and cross over.mkozakewich - Tuesday, November 21, 2017 - link
Less is more!MrSpadge - Tuesday, November 21, 2017 - link
Thanks Anton, for an article covering HDDs and the technology behind them in more depth than usual (for me)!MarionGrandJ - Monday, May 27, 2019 - link
According to https://toshiba.semicon-storage.com/content/dam/to... Toshiba MQ04AB series are SMR drives (an underlying category of PMR drives as said by others)