Subject: Storage | July 25, 2013 - 09:35 PM | Tim Verry
Tagged: turbo sshd, sshd, Seagate, nand, enterprise
Earlier this week Seagate took the wraps off of its latest Solid State Hybrid Drive (SSHD). Dubbed the Enterprise Turbo SSHD, this latest model is aimed at the enterprise server market. The drives combine a traditional 10K SAS mechanical hard drive in capacities up to 600GB with up to 32GB of NAND flash.
The 2.5" Enterprise Turbo SSHDs are aimed at servers with big data analytics, virtual desktops, and transaction processing workloads. The NAND flash acts as a cache for the mechanical hard drive, and caching is done by the controller at an I/O level.
According to Seagate, the company has been working with IBM over the past year to put the new SSHD through its paces. As such, the hybrid drives will first be available in the IBM X and BladeCentral servers. The IBM versions will have 16GB of NAND flash and one year warranties according to the documentation available online.
Seagate further claims up to three times random performance increase versus 15K SAS mechanical hard drives. The 600GB 10K SSHD is rated to have up to two times better IOPS than a traditional 10K SAS hard drive without a NAND cache.
The Enterprise Turbo also comes with enterprise-friendly drive self encryption options. The Seagate product page notes that the Enterprise Turbo SSHD will have a five year warranty. Pricing and detailed benchmarks are not yet available though some preliminary performance results can be found here.
The full press release can be found here.
Introduction and Specifications
Last week, Samsung flew a select group of press out to Seoul, Korea. The event was the 2013 Samsung Global SSD Summit. Here we saw the launch of a new consumer SSD, the 840 EVO:
This new SSD aims to replace the older 840 (non-Pro) model with one that is considerably more competitive. Let's just right into the specs:
Subject: General Tech, Storage | July 18, 2013 - 01:56 PM | Scott Michaud
Tagged: Raspberry Pi, nvidia, HPC, amazon
Adam DeConinck, high performance computing (HPC) systems engineer for NVIDIA, built a personal computer cluster in his spare time. While not exactly high performance, especially when compared to the systems he maintains for Amazon and his employer, its case is made of Lego and seems to be under a third of a cubic foot in volume.
Image source: NVIDIA Blogs
Raspberry Pi is based on a single-core ARM CPU bundled on an SoC with a 24 GFLOP GPU and 256 or 512 MB of memory. While this misses the cutesy point of the story, I am skeptical of the expected 16W power rating. Five Raspberry Pis, with Ethernet, draw a combined maximum of 17.5W, alone, and even that neglects the draw of the networking switch. My, personal, 8-port unmanaged switch is rated to draw 12W which, when added to 17.5W, is not 16W and thus something is being neglected or averaged. Then again, his device, power is his concern.
Despite constant development and maintenance of interconnected computers, professionally, Adam's will for related hobbies has not been displaced. Even after the initial build, he already plans to graft the Hadoop framework and really reign in the five ARM cores for something useful...
... but, let's be honest, probably not too useful.
Subject: General Tech, Storage | July 17, 2013 - 11:29 PM | Tim Verry
Tagged: nand, micron, flash, 16nm
Micron recently announced that is has begun sampling 16nm NAND flash to select partners. Micron expects to begin full production of the NAND chips using the smaller flash manufacturing process in the fourth quarter of this year (Q4 2013). Drives based on its new 16nm MLC NAND flash are expected to arrive as early as next year. (PC Perspective's own storage expert is currently overseas, but I managed to reach out over email to get some clarification, and his thoughts, on the Micron annuoncement.)
The announcement relates to new NAND flash that is smaller, but not necessarily faster, than the existing 20nm and 25nm flash chips used in current solid state drives. In the end, Micron is still delivering 128Gb (Gigabit) per die, but using a 16nm process. The 16nm flash is a pure shrink of 20nm which is, in turn, a shrink of 25nm flash. In fact, Micron is able to get just under 6 Terabytes of storage out of a single 300mm wafer. These wafers are then broken down into dies in individual flash chips that are used in all manner of solid state storage devices from smartphone embedded storage to desktop SSDs. This 16nm flash still delivers 128Gb --which is 16GB-- per die allowing for a 128GB SSD using as few as eight chips.
A single 16nm NAND flash die with a SSD in the background
Micron expects the 16nm MLC (multi-level cell) flash to be used in consumer SSDs, USB thumb drives, mobile devices, and cloud storage.
The 16nm process will allow Micron to get more storage out of the same sized wafer (300mm) used for current processes, which in theory should mean flash memory that is not only smaller, but (in theory) cheaper.
A single wafer of 16nm NAND flash (just under 6TBs)
As Allyn further notes, the downside to the new 16nm NAND flash is a reduction in the number of supported PE cycles. Micron has not released specific information on this, but the new 16nm MLC flash is expected to have fewer than 1,000 P/E cycles. For comparison, 25nm and 20nm flash has P/E cycles of 3,000 and 1,000 respectively.
In simple terms, P/E (program-erase) cycles relate to the number of times that a specific portion of flash memory can be written to before wearing out. SSD manufacturers were able to work around this with the transition from 25nm to 20nm and still deliver acceptable endurance on consumer drives, and I expect that similar techniques will be used to do the same for 16nm flash. For example, manufactuers could enable compression that is used prior to writing out the data to the physical flash or over-provisioning the actual hardware versus the reported software capacity (ie a drive sold as a 100GB model that actually has 128GB of physical flash).
I don't think it will be a big enough jump that typical consumers wil have to worry too much about this, considering the vast majority of operations will be read operations and not writes. Despite the reduction in P/E cycles, SSDs with 16nm NAND MLC flash will still likely out-last a typical mechanical hard drive.
What do you think about the Micron announcement?
The full press release can be found below:
Subject: Storage | July 17, 2013 - 10:39 PM | Allyn Malventano
Tagged: ssd, Samsung, pricing, EVO, 840 evo
Subject: Storage | July 17, 2013 - 10:12 PM | Allyn Malventano
Tagged: tlc, ssd, slc, sata, Samsung, cache, 840 evo
Samsung's release of the 840 EVO earlier today likely prompted some questions, such as what type of flash does it employ and how does it achieve such high write speeds. Here is the short answer, with many slides in-between, starting off with the main differences between the 840 and the 840 EVO:
So, slightly increased specs to help boost drive performance, and an important tidbit in that the new SSD does in fact keep TLC flash. Now a closer look at the increased write specs:
Ok, the speeds are much quicker, even though the flash is still TLC and even on a smaller process. How does it pull off this trick? Tech that Samsung calls TurboWrite.
A segment of the TLC flash is accessed by the controller as if it were SLC flash. This section of flash can be accessed (especially written) much faster. Writes are initially dumped to this area and that data is later moved over to the TLC area. This happenes as it would in a normal write-back cache - either during idle states or once the cache becomes full, which is what would happen during a sustained maximum speed write operation that is larger than the cache capacity. Here is the net effect with the cache in use and also when the cache becomes full:
For most users, even the smallest cache capacity will be sufficient for the vast majority of typical use. Larger caches appear in larger capacities, further improving performance under periods of large write demand. Here's the full spread of cache sizes per capacity point:
So there you have it, Samsung's new TurboWrite technology in a nutshell. More to follow (along with a performance review coming in the next few days). Stay tuned!
Subject: Storage | July 17, 2013 - 06:06 PM | Allyn Malventano
Tagged: Samsung, ssd, sata
Good morning from Seoul, Korea!
We're covering the 2013 Samsung Global SSD Summit, and the press embargo has just been lifted on a new SSD - the 840 EVO:
The EVO will push 10nm-class (1x nm) flash, promises increased (2x-3x) write speed improvements over the 840, and will be available in capaities as high as 1TB:
Full press blast after the break, and more to follow as the Samsung SSD Summit continues.
Subject: Storage | July 15, 2013 - 01:05 PM | Jeremy Hellstrom
Tagged: sandisk, Extreme II series, ssd, mlc, slc
SanDisk has done something interesting with their new Extreme II SSD series, they have used both SLC and MLC flash in the drive to attempt to give users the best of both worlds. The drive still has a DDR cache sitting between the flash storage and the controller, but there is an nCache between the MLC flash and the DDR comprised of ~1GB of SLC flash. The idea is that the SLC can quickly accumulate a number of small writes into a larger single write block which can then be passed to the MLC flash for storage. Don't think of it as a traditional cache in which entire programs are stored for quick access but more as a write buffer which fills up and then passes its self to the long term storage media once it is full. The Tech Report put this drive through their tests and found it to be a great all around performer, not the fastest nor the best value but very good in almost any usage scenario.
"With MLC main storage and an SLC flash cache, the SanDisk Extreme II is unlike any other SSD we've encountered. We explore the drive's unique design and see whether it can keep up with the fastest SSDs on the market."
Here are some more Storage reviews from around the web:
- Corsair Neutron GTX 240GB SSD RAID 0 Performance @ Legit Reviews
- SanDisk Extreme II @ SSD Review
- OCZ Vector 256GB @ LanOC Reviews
- Silicon Power Velox V55 240GB SSD @ NikKTech
- Western Digital Se 4TB Review @ TechwareLabs
- Seagate Laptop Thin SSHD 500 GB HDD Review @ Hardware Secrets
- Seagate Desktop HDD.15 4TB / Barracuda XT 4TB @ Hardware.info
- Western Digital SE 4TB Hard Drive @ hardCOREware
- Toshiba Nearline MG03ACA400 4TB SATA III HDD @ NikKTech
- Western Digital Sentinel DX4000 16TB RAID5 4-Bay NAS @ eTeknix
- Icy Box IB-WF200HD @ Rbmods
- Sandisk Extreme microSDXC UHS-I 64GB Memory Card Review @ Legit Reviews
- Patriot SuperSonic Mini 16GB USB 3.0 Flash Drive @ NikKTech
- 49 SD and MicroSD cards tested: there's a difference @ Hardware.info
- Mach Xtreme MX-FX 32GB USB 3.0 Flash Drive @ NikKTech
Subject: Storage | July 3, 2013 - 12:04 PM | Jeremy Hellstrom
Tagged: toshiba, THNSNH 256GB, ssd
If you buy a machine with an SSD installed inside of it there is a good chance it is from Toshiba and it might even be the THNSNH 256GB model. As these drives are not sold separately but only inside OEM machines it is not often benchmarked. [H]ard|OCP wants to change that and put this drive and its internally designed controller up against some of their favourite retail drives. Their testing revealed a mixed bag of performance as in some tests it came close to beating out Samsung's 840 series but in other testing ended up at the bottom of the pack. Still, as this drive will end up in many mobile devices it is good to get an idea of the performance you can expect from it.
"Toshiba's massive foundry capabilities allow it to develop some of the leading SSDs for the OEM market. These SSDs come pre-installed in the latest computers with the option for an SSD, and today we look at the Toshiba THNSNH in comparison to current top-flight enthusiast-class SSDs."
Here are some more Storage reviews from around the web:
- OCZ Vertex 450 256GB @ [H]ard|OCP
- OCZ's Vertex 450 solid-state drive reviewed
- Seagate 600 Series SSD 480 GB ST480HM000 @ techPowerUp
- SanDisk Ultra Plus Solid State Drive @ X-bit Reviews
- Strontium Hawk (240GB) @ AnandTech
- SanDisk Extreme II SSD 240GB @ TechSpot
- SanDisk Extreme II SSD Review (240GB) @ SSD Review
- Plextor M5 Pro PX-256M5P 256GB SSD @ NikKTech
- Angelbird SSD2Go 480GB External SSD @ SSD Review
- Monster Digital OverDrive 3.0 1TB External SSD @ SSD Review
- Seagate Backup Plus 1 TB External HDD Review @ Hardware Secrets
- Silicon Power Diamond D20 500GB USB 3.0 Portable Hard Drive @ NikKTech
- QNAP TS-221 and TS-220 @ Legion Hardware
- SilverStone DS322 Compact USB 3.0 RAID Enclosure Review @ Pro-Clockers
- Patriot Memory Tab 16GB USB 3.0 Flash Drive Review @ Madshrimps
- Icy Dock MB882SP and MB982IP Hard Drive Converter Reviews @ Legit Reviews
- Nine internal DVD burners and Blu-ray drives tested @ Hardware.info
- Hard Disk Drive Myths Debunked! @ TechARP
We caught wind of a leaked Intel SSD Roadmap over at VRZone. The slide shows their rough release plans into early 2014:
Starting bottom-up, the old 320 Series (cropped slide bottom) and 330 Series are being phased out in light of the newer 500 series entrants. The 335 Series, driven by a SandForce controller and 20nm flash, may drop in capacity to only an 80GB model in order to drive customers towards the new 530 Series, which will replace both of the SandForce-driven 520 (SATA) and 525 Series (mSATA) offerings. The new 530 Series will be available in 80-480GB and connect via SATA, mSATA, and the newest M.2 SATA interfaces. You can learn more about M.2 by reading the first 6 or so slides from Paul Wassenberg's presentation from Storage Visions 2013. Here's a closer look at an M.2 unit:
From CES 2013, a Micron mSATA SSD (above) and M.2 SATA SSD (below).
With the 530 appearing to become Intel's big mainstream consumer push, they will also introduce a Pro 1500 and 2500 Series. I suspect Intel's own SATA 6Gb/sec controller will be lifted from their SSD DC S3500 and S3700 Series and trickled down into the Pro Series and possibly even into the 530 Series, though that is only speculation on my part.
For the enterprise, Intel will be further juggling their enterprise models around a bit, discontinuing the SSD 710 and possibly even the (25nm) S3700 in favor of the (20nm) S3500 Series, which will also see large gains in available capacity upwards of 800GB and even 1.6TB crammed into a 2.5" SATA unit. Intel's PCIe SSD 910 will eventually be replaced by what appears to be a quad-SSD-RAID variant of the current S3500 and S3700 Series units, dubbed P3500 and P3700, respectively. These models should show a substantial gain over the SSD 910, which did not perform spectacularly when compared to the newer SATA models available.
Get notified when we go live!