Subject: General Tech, Storage, Shows and Expos | August 7, 2014 - 02:17 PM | Scott Michaud
Tagged: ssd, phase change memory, PCM, hgst, FMS 2014, FMS
According to an HGST press release, the company will bring an SSD based on phase change memory to the 2014 Flash Memory Summit in Santa Clara, California. They claim that it will actually be at their booth, on the show floor, for two days (August 6th and 7th).
The device, which is not branded, connects via PCIe 2.0 x4. It is designed for speed. It is allegedly capable of 3 million IOPS, with just 1.5 microseconds required for a single access. For comparison, the 800GB Intel SSD DC P3700, recently reviewed by Allyn, had a dominating lead over the competitors that he tested. It was just shy of 250 thousand IOPS. This is, supposedly, about twelve times faster.
While it is based on a different technology than NAND, and thus not directly comparable, the PCM chips are apparently manufactured at 45nm. Regardless, that is significantly larger lithography than competing products. Intel is manufacturing their flash at 20nm, while Samsung managed to use a 30nm process for their recent V-NAND launch.
What does concern me is the capacity per chip. According to the press release, it is 1Gb per chip. That is about two orders of magnitude smaller than what NAND is pushing. That is, also, the only reference to capacity in the entire press release. It makes me wonder how small the total drive capacity will be, especially compared to RAM drives.
Of course, because it does not seem to be a marketed product yet, nothing about pricing or availability. It will almost definitely be aimed at the enterprise market, though (especially given HGST's track record).
*** Update from Allyn ***
I'm hijacking Scott's news post with photos of the actual PCM SSD, from the FMS show floor:
In case you all are wondering, yes, it does in fact work:
One of the advantages of PCM is that it is addressed at smaller sections as compared to typical flash memory. This means you can see ~700k *single sector* random IOPS at QD=1. You can only pull off that sort of figure with extremely low IO latency. They only showed this output at their display, but ramping up QD > 1 should reasonably lead to the 3 million figure claimed in their release.
Subject: General Tech | November 30, 2012 - 01:38 PM | Jeremy Hellstrom
Tagged: nand, EMC, phase change memory
SSDs are not that old but already there is a challenge that must be overcome if it is to remain a viable storage medium. As Allyn has discussed many times in articles and on the podcast, as NAND process shrinks continue, the number of write cycles before failure drops which lowers the life expectancy of the drive even while it allows for high capacity chips and lower power consumption. Zahid Hussain is EMC's flash product division general manager and he is confident that his company will be able to do what Hynix, Samsung and others have so far been unable to do; work with Micron to replace the NAND chips with Phase Change Memory based chips. This type of chip is non-volatile and could also find its way into DIMMs as well. Read more at The Register.
"It is anticipated that, as NAND process geometries shrink beyond 15nm or so, the working life will fall off drastically, speed will slacken and the error checking and correction logic will become much more complicated. At that point, roughly, it is hoped, a post-NAND technology will be productised and deliver chips that are denser than flash, faster than flash, approaching DRAM speed, byte-addressable instead of block-addressable, and with a longer working life. That seems like a real big ask."
Here is some more Tech News from around the web:
- RIM announces updates to developer ecosystem programs @ The Register
- Updating the 2012 AnandTech SMB / SOHO NAS Testbed
- Guru3D Rig of the Month - November 2012
- Double Fine’s Brad Muir dishes out BRAZEN details @ Kitguru
- In Calculator Arms Race, Casio Fires Back: Color Touchscreen ClassPad @ Slashdot
Subject: General Tech | July 18, 2012 - 02:39 PM | Jeremy Hellstrom
Tagged: phase, phase change memory, micron, 45nm
Phase Change Memory is not new, Allyn listened to Intel talk about a breakthrough in this technology almost three years ago, but it is not common on the market. It offers two major benefits over the current RAM on the market, the first being its lack of volatility as the crystals it forms will remain even after power is cut off, the second is more dear to computer enthusiasts as it should be faster than DRAM. It may seem odd that a technology which requires the formation of crystals would be faster than the electronic flipping of bits but Micron claims that the trickle of voltage supplied creates seed crystals which speed the formation process during write cycles. The good news is that we should see real world testing soon as The Inquirer has heard that Micron has a good supply of PRAM to sell which means benchmarks are not far behind.
"MEMORY MAKER Micron has announced high volume availability of its 45nm phase change memory (PCM) chips.
Micron has been pushing the development of PCM chips with Intel for a number of years and is finally at a stage where it can offer chips to its customers. The firm announced that its 45nm PCM chips are available in a 1Gb PCM plus a 512Mb LPDDR2 package for mobile devices."
Here is some more Tech News from around the web:
- Hacking Skype for Better Teleconferencing @ Make
- Intel grazes Q2 numbers, but 'growth will be slower' in Q3 @ The Register
- Intel CEO Otellini promises $699 ultrabooks by fall @ The Register