What consumer hard drives have SMR platters?

Mar 27, 2009
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#1
1.) I know the following Seagate 2.5" do:

https://www.anandtech.com/show/10760/seagate-launches-firecuda-sshds-up-to-2-tb-smr-8-gb-of-nand

https://www.anandtech.com/show/1075...5-mobile-hard-drives-with-up-to-5-tb-capacity


2.) I am pretty certain Seagate 3.5" 5400 rpm desktop drive (ST4000DM04) does a well:

https://www.seagate.com/www-content...cuda-new/files/barracuda-ds-1900-5-1702us.pdf

4 heads and 2 Disks
256MB cache

2TB SMR platters right?


3.) WD10SPZX (Western Digital Blue 2.5" 7mm 1TB)??

https://www.wdc.com/products/internal-storage/wd-blue-mobile.html#WD10SPZX

https://www.wdc.com/content/dam/wdc/website/downloadable_assets/eng/spec_data_sheet/2879-771437.pdf

^^^^^ Interesting that it has 128MB cache. The other models (ranging from 250GB to 2TB capacity) have either 8MB or 16MB cache. (SMR drives need higher than normal size caches to work properly)

EDIT: The following link lists an areal density of 1060 Gbit/in2---> https://translate.google.com/translate?sl=auto&tl=en&js=y&prev=_t&hl=en&ie=UTF-8&u=https://forum.51nb.com/thread-1757824-1-1.html&edit-text=&act=url (high end PMR or lower end SMR?)

EDIT2: As a reference point the following HGST drive has SMR @ 1034 Gbit/in2---> https://www.anandtech.com/show/11901/western-digital-now-shipping-14tb-hgst-ultrastar-hs14

EDIT3: As a reference point Toshiba's MQ04ABF100 is the first 2.5" hard drive with 1TB platter and 128MB cache to have PMR---> https://forums.anandtech.com/thread...ives-have-smr-platters.2525313/#post-39180126 (So 1TB 2.5" platter with 128MB cache doesn't always mean SMR at this point)
 
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Mar 27, 2009
12,910
27
106
#2
2.) I am pretty certain Seagate 3.5" 5400 rpm desktop drive (ST4000DM04) does a well:

https://www.seagate.com/www-content...cuda-new/files/barracuda-ds-1900-5-1702us.pdf

4 heads and 2 Disks
256MB cache

2TB SMR platters right?
The 3TB 3.5" Barracuda (currently listed as ST3000DM007) in the link below now has 256MB cache and 3 heads/2 platters:

https://www.seagate.com/www-content/datasheets/pdfs/3-5-barracuda-3tbDS1900-10-1710US-en_US.pdf

So same 2TB SMR platter, but only 1 side of the second platter is being used.
 
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Mar 27, 2009
12,910
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#4
These all have 1.5TB PMR platters (eight total with Helium):

https://www.anandtech.com/show/11903/seagate-ships-consumerfocused-12tb-helium-drives

With this mentioned, according to this review there will be a 14TB Iron Wolf (non-Pro) by the end of the year.

Although using more platters could result in reduced performance levels the exact opposite has been happening for quite some time now and thus the new IronWolf 12TB hard disk drive is the fastest overall SATA model in our charts. True the performance gap compared to the 10TB model is far from large but it’s there and getting a faster drive is never a bad thing. Leaving out however the 2TB increase in capacity thanks to the extra platter everything else however remains the same including its endurance numbers (180TB/y – 1m MTBF), rotational speed (7200RPM) and cache (256MB). Perhaps what’s more interesting is that Seagate will be releasing a 14TB variant really soon so we can’t wait to see if that model will produce even higher read and write performance numbers.
14TB Iron Wolf (non-Pro) with SMR? The PCB used on the 12TB Iron Wolf (non-Pro) does have room for more cache according to the same review:



As usual at the rear we see a small PCB with all the modules placed on the other side for increased protection (we also see the same empty spot on the upper right corner which may one day be used for extra cache (or an SSHD model).
 
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May 7, 2002
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#5
I really wish they wouldn't sell these to consumers.
They just don't know about the limitations these things have, and the box doesn't mention anything that would steer people away from these things.

To them, a HD is a HD.
 
Mar 27, 2009
12,910
27
106
#6
These all have 1.5TB PMR platters (eight total with Helium):

https://www.anandtech.com/show/11903/seagate-ships-consumerfocused-12tb-helium-drives

With this mentioned, according to this review there will be a 14TB Iron Wolf (non-Pro) by the end of the year.



14TB Iron Wolf (non-Pro) with SMR? The PCB used on the 12TB Iron Wolf (non-Pro) does have room for more cache according to the same review:

The incoming 14TB Iron Wolf drives (mentioned in the above post) could have PMR as Showa Denko releases 9th Generation PMR platters at 1.8TB capacity for 3.5":

https://www.anandtech.com/show/1206...h-gen-pmr-tech-enables-14-tb-pmr-hdds-in-2018

P.S. The article above also mentions Toshiba's MQ04ABF100 1TB 2.5" hard drive with 128MB cache has 1TB 9th gen PMR platter.

http://www.sdk.co.jp/english/news/2017/26793.html

SDK’s 2.5-inch 1 TB HD media have been adopted into Toshiba Electronic Devices & Storage Corporation’s hard disk drive (HDD), “MQ04ABF100,” for client. SDK has started supplying its 2.5-inch HD media for this application, using the ninth-generation perpendicular magnetic recording (PMR) technology.
 
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Mar 27, 2009
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#7
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pilgrimshoes

Junior Member
Apr 3, 2018
2
0
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#10
I really wish they wouldn't sell these to consumers.
They just don't know about the limitations these things have, and the box doesn't mention anything that would steer people away from these things.

To them, a HD is a HD.
There are a lot of write once or rewrite infrequently uses that they might be useful for. A backup disk or a second hard drive.

But I'm puzzled by the way all the Seagate SMR/TGMR drives are sold for any and all uses. They've dropped the "archive" idea in the product description and categories. For example, the Barracuda Compute drives. Re-using an old brand name adds to the confusion, because the Barracude brand meant something else. Based on my limited knowledge, those don't seem at all suitable for use as a single drive or a primary drive. What am I missing?
 

pilgrimshoes

Junior Member
Apr 3, 2018
2
0
6
#11
This Seagate product manual from August 2016 says the 2TB ST2000LX001 Firecuda is a 5400 RPM perpendicular drive.

https://www.seagate.com/www-content...top-fam/laptop-sshd/en-us/docs/100802299c.pdf

But this product manual from February 2017 says "Shingled magnetic recording with perpendicular magnetic recording heads/media," but then gives the Recording Method as Perpendicular.
https://www.seagate.com/www-content...top-fam/laptop-sshd/en-us/docs/100802299e.pdf

Anyone know what that really means?

You'd think they could at least change the model number if they're going to change the technology.
 
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Mar 27, 2009
12,910
27
106
#12
This Seagate product manual from August 2016 says the 2TB ST2000LX001 Firecuda is a 5400 RPM perpendicular drive.

https://www.seagate.com/www-content...top-fam/laptop-sshd/en-us/docs/100802299c.pdf

But this product manual from February 2017 says "Shingled magnetic recording with perpendicular magnetic recording heads/media," but then gives the Recording Method as Perpendicular.
https://www.seagate.com/www-content...top-fam/laptop-sshd/en-us/docs/100802299e.pdf

Anyone know what that really means?

You'd think they could at least change the model number if they're going to change the technology.
The following post clears things up:

https://forums.anandtech.com/thread...-rpm-with-7mm-z-height.2539964/#post-39340397
 


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