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Toshiba at CES 2019: World's First 16 TB TDMR HDD Debuts
Toshiba has announced the industry's first hard drive featuring a 16 TB capacity. The MG08-series HDDs are designed for nearline applications and use two-dimensional magnetic recording (TDMR) technology, therefore offering consistent and predictable performance.
Toshiba's MG08 3.5-inch helium-filled hard drives rely on nine 1.7 TB PMR platters developed by Showa Denko K.K. (SDK) as well as 18 reader/writer TDMR heads designed by TDK. The HDD features a 7200 RPM spindle speed, a 512 MB DRAM buffer, and a SATA 6 Gbps or SAS 12 Gbps interface (depending on the model).
[...] Toshiba's MG08 drives represent a number of industry firsts. First up, Toshiba is the only company in [the] world to use a nine-platter HDD design. It was necessary with its 14 TB hard drives as the company did not use TDMR back then (unlike Seagate). Secondly, the MG08 uses SDK's PMR platters featuring a 0.635 mm z-height, that's down from 0.8 mm disks usually used for eight-platter designs. Thirdly, it uses TDMR heads developed by TDK, which enabled Toshiba to use the said platters.
Related: Seagate's 12 TB HDDs Are in Use, and 16 TB is Planned for 2018
Western Digital Announces a 15 TB Hard Drive for Data Centers
Seagate Starts to Test 16 TB HAMR (Heat-Assisted Magnetic Recording) Hard Drives
(Score: 3, Insightful) by takyon on Thursday January 10 2019, @11:21PM (20 children)
Yeah, nah. Kilo means 1000, a kilogram is not 1024 grams, etc. Call it "14.55 tebibytes" if you want, but that is 16 terabytes. You are trying to fight a war you lost decades ago, like the hacker/cracker thing. #Sad.
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(Score: 3, Informative) by krishnoid on Thursday January 10 2019, @11:34PM (4 children)
Anyone have good references on typical ranges of space taken up for filesystem overhead, both Windows and Linux?
(Score: 0) by Anonymous Coward on Friday January 11 2019, @12:11AM
Filesystem metadata overhead (2009) [wordpress.com], don't know how good is the method and the article is rather old.
(Score: 1, Funny) by Anonymous Coward on Friday January 11 2019, @12:57AM (2 children)
Yes. Windows 10 reserves 10 TB for telemetry data staging.
(Score: 2) by lentilla on Friday January 11 2019, @01:28AM (1 child)
I'm confused - should we mod this "funny" or "informative"?
(Score: 2) by takyon on Friday January 11 2019, @02:14AM
Probably a reference to this [archive.is].
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(Score: 2, Interesting) by mmh on Thursday January 10 2019, @11:50PM (1 child)
(Score: 3, Insightful) by takyon on Friday January 11 2019, @12:03AM
Yes, here is the authoritative source you are looking for: https://www.bipm.org/en/measurement-units/prefixes.html [bipm.org]
See also: https://www.iso.org/standard/31898.html [iso.org]
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(Score: 3, Interesting) by fustakrakich on Friday January 11 2019, @01:02AM (10 children)
A kilobyte is 2^10, not 10^3, right?
La politica e i criminali sono la stessa cosa..
(Score: 4, Informative) by takyon on Friday January 11 2019, @01:11AM (9 children)
kilobyte = 10^3 bytes
kibibyte = 2^10 bytes
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(Score: 0) by Anonymous Coward on Friday January 11 2019, @02:32AM (3 children)
Nobody on the fucking planet uses "kibibyte".
It was always kilobyte and will always be kilobyte.
I can see using the KiB abbreviation for disambiguation though because it looks nearly identical to the old KB abbreviation and can prevent any misunderstanding.
(Although there never WAS any misunderstanding until hard drive makers silently and deceitfully redefined MB and GB to be smaller units so as to inflate their drives' stated storage capacity for marketing purposes.)
(Score: 2) by takyon on Friday January 11 2019, @02:42AM (1 child)
Refer to my comment about fighting a war you lost decades ago.
Kilo means thousand. Making it mean both 1000 and 1024 in different contexts is nonsensical, and not the globally accepted practice.
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(Score: 2) by black6host on Friday January 11 2019, @03:50AM
Being a loser for decades doesn't make you wrong! :)
(Score: 2, Interesting) by pTamok on Friday January 11 2019, @08:37PM
Nobody on the fucking planet uses "kibibyte".
It was always kilobyte and will always be kilobyte.
I can see using the KiB abbreviation for disambiguation though because it looks nearly identical to the old KB abbreviation and can prevent any misunderstanding.
(Although there never WAS any misunderstanding until hard drive makers silently and deceitfully redefined MB and GB to be smaller units so as to inflate their drives' stated storage capacity for marketing purposes.)
Well, actually...if you work in telecomms, the ambiguity of 'kilo' was a real pain, and still is. As a result of the computer industry appropriating kilo to mean 210 instead of 103, people get really confused when trying to work out the capacity of telecommunications circuits, and the issue is compounded when people use KB to mean 'kilobytes'.
When voice telephony was digitalized, it was agreed that the audio would be sampled 8,000 times per second, and each sample would be an 8 bit value. This meant that a voice channel used 8,000 multiplied by 8 = 64,000 bits per second. When it became the practice to send data down the same channels, it followed that the basic circuit was a 64,000 bit per second circuit, which could be termed a 64kbps circuit*. Inevitably, some people would call it a '64kb' circuit, or even just a '64K' circuit. Come the computer revolution, people tend to think of 'K' meaning kilobyte and people get the impression that a 64K circuit can carry 64 kilobytes of data per second, meaning 64 multiplied by 1024 multiplied by 8 bits per second. So someone orders a 64K circuit, expecting to get 524,288 bits per second and is unpleasantly surprised to get only 64,000 bits per second.
I still see monitoring applications labelling telecommunications circuits in kibibytes per second. In telecomms, circuits are measured in bits per second [wikipedia.org], with kilo meaning 103; mega meaning 106; giga meaning 109; and tera meaning 1012. (It doesn't help that the respective symbols are k; M; G; and T. k is often incorrectly written K (which is the symbol for Kelvin) and while some people use b for bit and B for Byte, it is not universally understood, especially among people writing advertizing copy)
You can relax now. My rant is over.
*In the USA some of the least significant bits of the samples were used to carry signalling information (robbed-bit signalling) in the digitized voice. As a result, if such a circuit was used for digital transmission, you could only send 56 kbps - if you tried to send 64 kbps, some of the data would be corrupted by the signalling information.
(Score: 1) by fustakrakich on Friday January 11 2019, @02:47AM (4 children)
kibi... a twenty year old term... I was under the impression that people of the scientific persuasion had no problem differentiating kilobyte from kilogram without having to go through the trouble of having to invent another word. Oh well, I guess "byte" is the least significant bit of the word.. I mean, 'kibi' works and all, but it sounds funny, like a mispronunciation by a 3 year old.
La politica e i criminali sono la stessa cosa..
(Score: 2) by takyon on Friday January 11 2019, @03:00AM (3 children)
"kibibyte" is unlikely to turn up in any significant human conversations, aka the ones that would get you laid.
"KiB" can be used to represent kibibyte, "MiB" for mebibyte, etc.
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(Score: 1) by fustakrakich on Friday January 11 2019, @03:50AM (2 children)
There ya go. "Men in Black" is cool. But the other poster is right, Madison Avenue forced us into this mess. There was no problem until computers got popular with people that don't speak binary.
La politica e i criminali sono la stessa cosa..
(Score: 3, Interesting) by realDonaldTrump on Friday January 11 2019, @08:37AM (1 child)
Computers have complicated lives VERY GREATLY. Very seldom do I do the EMAIL thing. Lindsey has never done it. So many people are staying away from computer. And the cyber security, the security for the cyber, is almost impossible. It’s very important. If you have something really important, write it out and have it delivered by Courier, the old-fashioned way. Because I’ll tell you what, no computer is safe.
(Score: 0) by Anonymous Coward on Friday January 11 2019, @05:01PM
Why not keep your secrets on dissolving spy paper in your "Depends" so when your bladder lets go as your're arrested it will destroy the evidence?
(Score: 3, Interesting) by realDonaldTrump on Friday January 11 2019, @09:33AM (1 child)
Jerry Ford was one of our greatest Presidents. He took his Military out of Vietnam. Something his predecessors, for 30 years, didn't do. But even he had a moment of GROSS incompetence. When he said, "oh, we'll change to the Metric System!" Something nobody wanted. And nobody understood. I think nobody had any idea how complex the Metric would be. And fortunately they did the Repeal & Replace on that one before it destroyed our Country. Can you imagine, you go to the Deli, you say, "oh, give me a Kilogram of Baloney." And the butcher goes in the back, you hear him grunting back there. And he comes out wheeling the cart. With this HUGE crate of Baloney. Because you ordered in Metric. And made a tremendous fool of yourself. No thanks, we're keeping our Pound!!
(Score: 0) by Anonymous Coward on Friday January 11 2019, @04:49PM
We get enough Baloney from you.