Building cloud services is based on storage systems – reliable and high-performance and high-speed. Otherwise, it is impossible to serve a huge number of users
it is necessary that none of them has difficulty in waiting for the system to wait for a long time to respond or to complete the process. In addition, do not forget about the capacity – the size of storage should
be gigantic, even if there aren’t millions of users.
It would seem as simple as possible: we build datacenters, install storage subsystems, stuff rack counters and merge them into RAID arrays. That’s right, but there are only such stumbling blocks,
how energy and cooling are, I will tell you, expendable items.
To the credit of the developers, they are trying very hard to overcome these barriers, making fantastic solutions at times. One of them is a classic single-letter, half-length form factor reinforced
board, closed by a large radiator. The mounting bracket is decorated with a grille for heat dissipation, and the connector clearly indicates that working this unit is clearly in the full-size PCIe slot.
Isn’t it right that there are associations with the video card right away? If it were not for the external connectors and the usual cooling fans, one could ask. However, meet: HGST
UltraStar SN260 3200 GB (or 3.2 TB) with PCI Express 3.0 interface not less than x8. Up to 1,200,000 IOPS per read (read)
fastest SAS SSD in its class. With the record, too – up to 200,000 IOPS at random. Curious enthusiasts have already estimated that such a speed of information exchange was
typical of RAM ten years ago, and in 2003, the most powerful PC could boast no more than dual-channel memory DDR-400, the maximum bandwidth of which
estimated at 6.4 GB / s.
Such sky-high heights have been largely achieved thanks to a proprietary controller that supports NVMe 1.2 and, apparently, using a low-density LDPC code for
parity. But that’s not all – the HGST UltraStar SN260 is also very reliable: according to the developers, it supports up to three full cycles of full capacity rewriting per day (DWPD, Disk Write per Day),
provides secure data transfer, features secure data deletion features, provides encryption, power outage protection and many other features required in
In one of the presentations, Senior Vice President of Western Digital Devices, Mark Grace, described his brainchildren as follows: “We raised the bar
Enterprise class repositories are our most advanced SAS SSDs, NVMe SSDs and HDDs for today. Ultrastar SN200 NVMe PCIe Series Unmatched Storage
and bandwidth sufficient for even the most demanding data center applications. ”
It is noteworthy that with all their amazing capabilities, representatives of this class consume no more than 25 watts (!) Under load, which allows them to build not only high-performance,
but also extremely cost-effective storage facilities that do not require excessive power costs and heat removal. The successful solutions built on these devices have not yet been reported,
but it seems to be only a matter of time and market readiness. Given cloud traffic growth forecasts of up to 19.5 Zbytes by 2021, the need for high-speed, high-capacity disk drives
reliability and low power consumption are clearly not far off.
SSD, tests and reviews
low power consumption