Toshiba Launches 14TB Helium Sealed PMR Hard Drives For Enterprise Customers

Subject: Storage | December 9, 2017 - 11:46 PM |
Tagged: PMR, toshiba, helium, Hard Drive, enterprise, cmr, cloud storage, 14tb

Toshiba recently took the wraps off of a new hard drive series aimed at the enterprise market. What makes the MG07ACA series interesting is that Toshiba is offering a 14 TB 3.5” drive without resorting to using Shingled Magnetic Recording. Instead, the new MG07ACA series uses standard recording methods (CMR) and nine ~1.556 TB PMR (perpendicular magnetic recording) platters in an helium filled hermetically sealed enclosure to hit 40% more capacity and up to 50% better power efficiency than the previous MG06ACA (10 TB) series. The new drives are also important because they represent the first foray into helium filled hard drives for Toshiba following the company pushing air breathing drives to the limit with its seven platter models.

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The new drives are standard 7200 RPM models with 256 MB of cache and a SATA 6 Gbps interface. The 14 TB model is able to hit 260 MB/s sustained transfer while the slightly lower areal density of the 12 TB model puts it at a 250 MB/s transfer speed maximum. They are able to hit 167 random 4K read IOPS and 70 random 4k write IOPS (which is fun to compare to even the slowest SSDs today, but these drives aren't for random workloads). Toshiba rates the drives at a fairly industry standard 550 TB per year workload and 2.5 million hours MTBF with a five year warranty. Toshiba is reportedly using its own laser welding technology to seal the drives and keep the helium contained. The MG07ACA drives are offered in emulated 512 (512e) and 4k native sectors with the 512e models featuring Toshiba Persistent Write Cache technology to prevent data loss in the event of power failure while the drives are executing read-modify-write operations. The power loss protection (PLP) is important for enterprise customers using these drives to upgrade the storage in their legacy software and hardware setups.

The MG07ACA series includes 14 TB 9-disk and 12 TB 8-disk drives. That’s a lot of platters in a single drive, but Toshiba claims that going this route with CMR / PMR reduces the total cost of ownership (TCO) for enterprise customers that are buying up high capacity drives for their cloud storage and big data storage needs. The drives are allegedly more power efficient and trusted in the enterprise market as opposed to the newer shingled drives. I suppose these drives are also useful as they can be drop in upgrades of lower capacity models.

John Rydning, Research Vice President for hard disk drives at IDC was quoted in the press release in saying:

"While enterprise server and storage customers realize that shingled magnetic recording (SMR) technology can improve HDD capacity, the adoption of SMR HDD products into server and storage systems is a transition that will take several years,"

Interestingly the drives offer 1.5 TB / platter in the 12 TB model and a bit more than 1.55 TB / platter in the 14 TB drive. With SMR technology hitting up to 1.75 TB / platter so far, using that could get a 14 TB drive with just 8 platters, but that is still fairly close that I suppose going with the longer track record of non shingled PMR and its reliability is more important to the enterprise customers.

In order to cram 9 platters into a standard 3.5" drive, Toshiba had to make the platters thinner and move to helium instead of air. Specifically, Toshiba is using 0.635mm Showa Denko (SDK) PMR platters that are a mere 1.58mm apart! The drives have Nidec motors on the top and bottom as well as environmental sensors and RVFF (Rotation Vibration Feed Forward) vibration compensation technology which is important when you have nine platters spinning at 7200 RPM in each drive and then hundreds of drives are placed in close proximity to each other in server racks and SANs. The move to helium and thinner platters is a big part of the power savings in this drive with the platters being easier to spin up and exhibiting less flutter moving through the much less dense helium versus air. Toshiba claims that the MG07ACA series uses up to 7.6 watts in normal operation and 4.6 watts at idle (0.32W/GB).

According to AnandTech, Toshiba will begin sampling the new hard drives later this month and will sell the drives to its large enterprise customers within the first half of next year. Once demand from the big data crowd has been met, Toshiba will being selling the drives through distributors which means enthusiasts will be able to get their hands on the drives through normal channels by the end of 2018. Exact pricing and availability have not been announced at this time.

Also read:

Source: Toshiba

December 10, 2017 | 12:00 PM - Posted by FloatingGiants (not verified)

Those 9 platters and how much storage under the read/write heads across those 9 platters/18 R/W heads? I'm talking about how large of a file can be stored without having to move the read/write heads to another track on the drive. The IBM Mainframes/other makers mainframes at the time(Way Back) had cylinder mode file allocation where files where stored across the platters in such a way as to comprise a cylinder of storage top to bottom across the platters with each platter storing on both sides and across the virtical stack and that file allocated contigous cylinders so read/write head movement was kept to a minimum.

But that was back when hard drives where large and more like washing machines and seek times where much longer and R/W speeds where not as fast and that could add up to reduce performance much more than on modern hard drives. And at that time a hard drive crash clould literally mean large parts and platters flying about like Oddjob's deadly bowler!

“A lot of your readers may not be aware of these wondrous machines … but they were really something to behold,” Tim told The Register. “They were the size of a washing machine and contained as much as 50MB, plus a lot of scary moving parts.”

“They came with a disk pack with 10 platters that rotated at 2,000 RPM. In addition there was a linear motor that moved the heads across the disk. Although it didn't move very fast it achieved the target speed with almost instantaneous acceleration and was a gigantic piece of moving machinery.”

This was in the 1980s, remember? So health and safety was yet to become pervasively paranoid. That meant that “these terrifying machines normally contained all their rotating parts within covers that protected the unwary from losing digits, however when being serviced you had to remove the covers and expose the whirling innards.” "(1)


"Disk drive fired 'Frisbees of death' across data centre after storage admin crossed his wires

And this was after he avoided losing some fingers"

December 11, 2017 | 12:36 PM - Posted by SteveUK (not verified)

Yay 14TB harddrive actually formats to 12.73TB useable space. So sick of these bull**** sales vs. real world application specs. Why won't WD Toshiba or Seagate just list the formatted size. I wish tech reviewers would call out this more as well. Newer SSD drives should have seen an end to this practice even though they keep listing spinning disks in decimal sizes.

December 11, 2017 | 01:34 PM - Posted by ItsOneOfThemNumbersGamesMarketingPlays (not verified)

Yes but it's using 4k(4096 byte)native sectors so that's going to cut down on formatting overhead and yes those disk drive makers also need to stop quoting the dive's capacity in decimal and start reporting the real computer way where eveything is powers of 2 when some drive makers quote the dirve's capicity. But that's a marketing scheme and drive makers pushed that decimal drive capacity nonsense through on the standards organizations.

December 11, 2017 | 02:08 PM - Posted by Allyn Malventano

Well, you are actually getting 14,000,000,000 bytes of storage, so one might argue it's the fault of base 2 numbering for the discrepancy.

SSDs use the same numbering system mainly as it meshes nicely with the over-provisioning they require (otherwise they would be the oddball with base 10 capacities while hdds hypothetically had base 2).

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