Western Digital Offers Ultrastar DC HC620 HDD with 15TB storage volume
Hard disks (HDD) with up to 14 TB of storage space you can buy. The next step was expected to be 16 TB, but Western Digital just announced theor Ultrastar DC HC620 series which is a 15 TB hard drive. Shingled Magnetic Recording (SMR) provides the necessary data density.
Shingled Magnetic Recording is a comparatively inexpensive method for increasing the storage density. However, the disadvantage of the technique is that when rewriting, adjacent tracks also have to be updated, which means some loss of performance. For this reason, SMR hard drives are primarily used for rare and sequential write applications such as archival storage and cloud storage.
WD Ultrastar DC HC530 14 TB WD Ultrastar DC HC620 14 TB
(formerly HGST Ultrastar Hs14)WD Ultrastar DC HC620 15 TB
form factor
3.5 inches (26.11 mm height)
interface
SATA 6 Gb / s
SAS 12 Gb / s
SATA 6 Gb / s
SAS 12 Gb / s
SATA 6 Gb / s
SAS 12 Gb / s
recording technology
PMR + TDMR
PMR + SMR
PMR + SMR + TDMR?
Speed (rpm)
7200
cache
512 MB
typ. continuous transfer rate
255 MiB / s (267 MB / s)
223 MiB / s (234 MB / s)
244 MiB / s (255 MB / s)
volume
2.0 / 3.6 sone (idle / load)
input
Read / Write *: 7.6 W
Idle: 5.6 WRead / Write *: 10.2 W
Idle: 6.3 WRead / Write *: 6.4 W
Idle: 5.2 WRead / Write *: 8.3 W
Idle: 6.2 WRead / Write *: 6.4 W
Idle: 5.2 WRead / Write *: 8.3 W
Idle: 6.2 W
Efficiency (idle)
0.40 W / TB
0.45 W / TB
0.37 W / TB
0.44 W / TB
0.35 W / TB
0.41 W / TB
Load / unload cycles
600000
Suitability for continuous operation
✓ (24 × 7)
Workload / year
550 TB
Non-correctable read errors
per read bits1 in 10 15
MTBF
2.5 million hours
warranty
5 years
* SATA Models: 8KB Queue Depth = 1 @ 40 IOPS, SAS Models: 4KB Queue Depth = 4 @ Max. IOPS
"With data continuing to grow at unprecedented rates, many hyperscale and cloud storage customers know that their workloads trend toward data that is written sequentially. In these instances, customers are optimizing their infrastructures with the lowest TCO and the maximum capacity," said Eyal Bek, vice president of product marketing, Western Digital. "By capitalizing on our highest-capacity SMR storage solutions, our customers' investment can not only be fully leveraged today, but for subsequent generations of SMR areal density improvements for continued infrastructure optimization."
Setting a new bar for TCO, the Ultrastar 15TB host-managed SMR HDD is well positioned for hyperscale cloud and traditional data center workloads, including large video surveillance "smart city" initiatives, storage for regulatory compliance and Big Data storage. Enabling the world's densest server and storage systems, incorporating 15 TB HDDs allows a fully populated 4U60 HDD enclosure to reach a raw storage capacity of 900 TB, which is an additional 60 TB per 4U rack in the same footprint compared to those utilizing 14 TB HDDs. In an at-scale environment where floor space, $/TB, TB per square foot, or watts per terabyte are critical, this TCO savings can be significant.
Based on the company's proven HelioSeal platform, and as an extension to the industry's first 14 TB SMR HDD family, the 15TB enterprise-class Ultrastar DC HC620 host-managed SMR HDD reflects another industry first, continuing the company's tradition of delivering the highest capacity enterprise-class HDDs in the market. Western Digital is currently shipping Ultrastar DC HC620 qualification samples to select customers with broader availability later this quarter.
The new Ultrastar DC HC620 HDD further expands Western Digital's broad range of enterprise-class storage solutions, which include high-performance NVMe SSD devices, innovative HelioSeal enterprise-class hard disk drives as well as SAS and SATA SSDs. The company's data center systems include its ActiveScale , IntelliFlash , OpenFlex , and Ultrastar storage servers and platforms.
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Senior Member
Posts: 2770
Joined: 2004-02-02
What? With which model have they reached such speeds?
Senior Member
Posts: 3104
Joined: 2016-08-01
Hdd's ???? Only in some king of raid else not even close for anu hdd not just seagate ones
Senior Member
Posts: 3651
Joined: 2007-05-31
It's not because they use 600mb/s interface, that they use this speed.
In heavy stripping Raid it do better but not as fast (even with dedicated controler with huge cache)
Seagate can go this way with SSHD in some case (that they used for the promo

Also HDD are for mass stockage (like the Seagate 15To or this one), because SSD don't go with this size, for everything less than 4To in single unit: SSD
*edit* the Ironwolf PRO 14To with 267mb/s at max is the fastest HDD from Seagate.
Senior Member
Posts: 358
Joined: 2018-08-04
Hmm 250 mb/s is not bad but i hope they do some 500 mb/s super fast hdd like seagate