Subject: Storage | March 8, 2013 - 09:20 AM | Tim Verry
Tagged: sshd, solid state, Seagate, Intel SRT, cache, adaptive memory
Following the announcement that the company would be axing 7200 rpm notebook drives, Seagate has introduced its third generation hybrid hard drives. The new Seagate Solid State Hybrid Drives (SSHD) will initially launch with two notebook drives and a single desktop-sized drive. The hybrid drives will combine a spinning platter drive with 8GB of NAND flash with Seagate’s Adaptive Memory tech that will reportedly cache reads as well as writes.
The 2.5” notebook SSHDs include a 7mm model that combines 500GB of mechanical storage and 8GB of Adaptive Memory cache. This model will retail for around $80. There will also be a slightly larger 9.5mm with 8GB of cache and 1TB mechanical hard drive capacity. The 1TB model utilizes two 500GB, 5400RPM platters and will retail for just under $100.
The desktop SSHDs come in 3.5” form factor and will initially use 7200 RPM platters. Seagate will offer up to 2TB of mechanical storage with its SSHDs and 8GB of NAND flash for caching. Seagate claims that its desktop SSHD is up to four times faster than other mechanical hard drives, (according to PC Mark Vantage) which is likely due to the Adaptive Memory technology caching frequently used data on the flash memory and the use of 1TB platters. The 1TB and 2TB SSHD will cost around $100 and $150 respectively. Naturally, the SSHDs will carry a small premium over traditional mechanical hard drives. They will still be much more price-efficient than Solid State Drives for the storage offered (though I would still like to see a larger NAND cache).
Interestingly, Tech Report was able to glean a few more details about Seagate’s third generation hybrid drives. Reportedly, the drives will be capable of writing as well as reading to/from the NAND cache. That is a major step up from previous generation’s which limited the drive’s flash storage to a read-only cache. Seagate has reportedly built the drives such that they will have enough capacitance to flush the write cache in the event of a power failure (so that you will not lose any data). The dual mode NAND term stems from Seagate’s ability to use SLC for boot data and the write cache and address the remaining NAND as MLC flash. Unfortunately, details are scarce on how Seagate is doing this.
The SSHDs will come with three year warranties, but Seagate has rated the NAND flash at a lifespan of at least five years. In an neat twist, Seagate is also allegedly working on another SSHD implementation that will combine a mechanical hard drive and a larger NAND cache. However, the flash memory will be managed by Intel’s Smart Response Technology instead of Seagate’s own Adaptive Memory tech (which doesn't need additional drives, unlike SRT). Using the port multiplexing aspect of the SATA spec, Seagate will be able to put both drives into a single 3.5” form factor hybrid drive. Admittedly, this is the Seagate SSHD that I am most excited about, despite the fact that it’s also the drive I know the least about. I’m interested to see what kind of performance Seagate can wring out of the larger cache!
Subject: Storage | March 8, 2013 - 12:21 AM | Tim Verry
Tagged: synology, storage, networked attached storage, NAS, dsm 4.2
Synology recently took the wraps off its latest NAS management software, called DiskStation Manager (DSM) 4.2. The new software suite is available as a free update for a number of its products.
Diskstation Manager provides a number of features for home and business uses. Business users are now able to take advantage of Synology High Availability duplication on all x86-based NAS products. A RAIDIUS server, SSL encryption between devices and Diskstation Cloud, and two step authentication are among the available security features with DSM 4.2.
DSM 4.2 comes with a web-accessible user interface and desktop-like environment. You can access all its features in a GUI, see disk/RAM/CPU usage, schedule tasks, and even PXE boot other networked machines. Some of the updated software bits include Cloud Station, Photo Station, File Station, Video Station, and Audio Station.
Cloud Station now has 52% faster file transfers to Mac OSX computers. Further, DSM 4.2 supports almost-unlimited user accounts, LDAP, Active Director, and Amazon’s Glacier backup service. File station now supports hot keys. Video Station has a revamped user interface that supports MKV subtitles, HDHomerun DVB-T tuners with mutli-channel TV streaming and recording. Users can also watch movies over the network on DLNA devices or Apple’s AirPlay. DSM 4.2 supports the use of smartphones as remote controls to control playback of media. Finally, Audio Station has added Bluetooth A2DP streaming support, and Photo Station supports file drag and drop and improved thumbnail generation speeds.
DiskStation Cloud now supports automatic backup and file synchronization of media stored on iOS and Android devices. DiskStation Video adds support to stream media to smartphones and DiskStation Photo+ has the Dropbox-like automated backup of photos from your smartphone. DSM 4.2 further features QuickConnect, which takes care of port forwarding automatically. QuickConnect is compatible with DS Photo+, DS Audio, and DS Cloud.
According to Synology, the following devices are eligible for a free update to DSM 4.2. Users can update by manually downloading and applying the update or by going through the updater in the DSM software itself.
"Synology DSM 4.2 is free to download for users who own a DiskStation or RackStation x09 series and onward. Supported models include: DS213+, DS413, DS213, DS413j, DS213air, DS2413+, DS713+, RS10613xs+, RS3413xs+, DS712+, DS212, DS212+, DS212j, RS212, RS812, DS1512+, DS1812+, DS3612xs, RS3412xs, RS3412RPxs, DS112j, DS112, DS412+, RS812+, RS812RP+, RS2212+, RS2212RP+, DS112+, DS3611xs, RS3411xs, RS3411RPxs, DS2411+, RS2211+, RS2211RP+, DS1511+, RS411, DS411, DS411+II, DS411+, DS411j, DS411slim, DS211+, DS211, DS211j, DS111, DS1010+, RS810+, RS810RP+, DS410, DS410j, DS710+, DS210+, DS210j, DS110+, DS110j, DS509+, RS409+, RS409RP+, RS409, DS409+, DS409, DS209+II, DS209+, DS209, DS209j, DS109+, DS109, DS109j, and DS409slim"
Also read: ioSafe N2 - The Performance NAS is now Disaster-proof @ PC Perspective.
Subject: Storage | March 7, 2013 - 07:53 PM | Jeremy Hellstrom
Tagged: Sandforce SF2281, adata, sx900
Allyn reviewed the ADTA SX900 back in February which might make you question why we are revisiting this drive in this [H]ard|OCP review. The reason lies in the controller as the SSD Al reviewed contained the SF-2281VB1-S0C while the drive [H] received contains a 2281VB2-SPC controller. [H] had many of the same worries as Al, with ancient firmware being the most relevant, with [H] specifically stating that '5.0.2a firmware does not have working TRIM functionality,' which should cause concern for anyone considering this drive. They also notived power usage above 10W which they felt was odd on a drive marketed as having improved power consumption and ended up unable to recommend this drive.
"The ADATA SX900 128GB SSD came to us with a surprise under the hood, the new B02 version of the SandForce SF-2281 controller. This new stepping is designed to provide revolutionary improvements in power efficiency with no loss of speed. We test the SX900 and the SF-2281VB2-SPC controller to see how it stacks up against the competition."
Here are some more Storage reviews from around the web:
- Monster Digital Daytona 240GB @ Tweaktown
- Kingston HyperX 3K 240 GB @ techPowerUp
- Plextor M5 Pro Xtreme 256GB @ Tweaktown
- Plextor M5 Pro 256GB SSD with Xtreme 1.02 Firmware @ Tweaktown
- Samsung SM843 Pro Data Center Series 240GB @ Tweaktown
- How to Maximize Storage Space Guide @ OCC
- ioSafe N2: A Disaster-Resistant Synology DS213 @ AnandTech
- Vantec NexStar WiFi Hard Drive Dock Review @ Techgage
- Toshiba STOR.E SLIM 500GB USB 3.0 Portable Hard Drive Review @ NikKTech
- ADATA DashDrive Air AE400 @ Kitguru
Introduction, Specifications, and Packaging
Last year we did a combined review of the ioSafe SoloPRO and the Synology Diskstation 212+ NAS solution. The ioSafe handled the function of disaster-hardened storage, capable of withstanding a typical building fire along with the resulting drenching from your friendly neighborhood fire department, while the DiskStation made the USB-connected ioSafe available to the network and added numerous additional features as part of its excellent DSM software suite, offering many features to both both home and business users:
The whole time I was working on that article, I kept wondering how cool it would be if both items were combined into one unit. You could then get the additional benefit of multi-drive redundancy *and* the disaster-proof protection offered by the ioSafe. Well, that just happened:
Behold the ioSafe N2!
Apacer recently launched two new SSDs aimed at commercial and industrial applications. The drives will offer up either SLC or MLC NAND flash, but with a twist. The two drives feature the IDE / PATA interface instead of the newer SATA interface seen in today’s systems. Apacer is hoping its PATA SSDs will be used as an upgrade path when the hard drives currently used in industrial systems need replaced. The new Solid State Drives fall under the Apacer AFD 257 and AFD 187 series. The Apacer AFD-257 Premium is a 2.5" drive, and the AFD-187 Premium is a 1.8" drive.
To accommodate the greater need to data protection in such systems, Apacer has built several security features into the drives. The new PATA SSDs include Full Erase, Destroy, and Write Protection features. Interestingly, those security features can be activated using software or via hardware connected to a small port on the drives via a cable that can be routed to a control panel on the external IO of a chassis.
The drives have up to 256 GB capacities and have standard features such as SMART, wear leveling, and ECC (72-bit). The IDE interface is rather antiquated, but Apacer at least supports the faster transfer modes including: DIO Mode-4, MWDMA Mode-2, and Ultra DMA-6. PATA SSDs were somewhat-rare when IDE was still the dominant consumer standard, so it is nice to see there are alternatives for replacement parts still available.
Unfortunately, there is no word on pricing or availability. Transfer speeds are also unknown, but you can expect it to be bottle-necked by the IDE interface (though random access speeds should be a huge improvement over a hard drive, even with the slower PATA interface).
Subject: Storage | March 1, 2013 - 04:43 PM | Jeremy Hellstrom
Tagged: plextor, Marvell. Monet 9187, 19nm, toggle NAND, M5 Pro Extreme
Plextor used to be famous for their CD burners and the number of sheep that they were rated, but the days of blindwrite and moving carefully about the PC while burning a disk are long gone. Instead they are focused on SSDs and other storage media, including the M5 Pro Extreme which [H]ard|OCP just reviewed. It features a powerful Marvell controller not used by many competitors and 19nm Toggle flash from Toshiba. While this drive will not compete against some when used by gamers, that is not what Plextor intended for this drive. Instead focus on the steady write performance as this is a professional drive which thrives under heavy workloads. Check out the review if you need some fast media for video or high end graphics work.
"The Plextor M5 Pro Xtreme 256GB SSD is designed and optimized for users with demanding workloads. The Marvell Monet 9187 controller in tandem with the 19nm Toshiba Toggle Mode NAND provides outstanding specifications. We test the M5 Pro Xtreme with other flagship SSDs."
Here are some more Storage reviews from around the web:
- Mushkin Atlas Deluxe mSATA 30GB SSD Review @ Legit Reviews
- OCZ Vector 256GB SATA III 2.5'' SSD Review @ Madshrimps
- Kingston LSI SandForce B02 for Low Power SSD's - Power Consumption Investigation @ Tweaktown
- SanDisk Ultra Plus 256GB SSD Review @ Hardware Canucks
- Adaptec by PMC ASR-72405 Enterprise RAID Controller @ Tweaktown
- OCZ Vector 256GB SSD Review @ Custom PC Review
- OCZ Vector Solid State Drive @ Benchmark Reviews
- OCZ Agility 4 256gb @ LanOC Reviews
- Kingston SSDNow V300 128GB Solid State Drive Review @ Pro-Clockers
- TRIMcheck: Does Your SSD Really have TRIM Working? @ SSD Review
- Building a Home Server - The Complete Guide @ SSD Review
- omega Storcenter ix4-300d review: affordable network storage @ Hardware.info
- ASUSTOR AS-604T 4-Bay NAS @ X-bit LAbs
- Western Digital Caviar Black 4TB @ Hardware.info
- Lexar JumpDrive Triton 32GB USB 3.0 Flash Drive @ Tweaktown
- Seagate Enterprise Capacity 3.5 V.3 4TB SAS 6Gb/s HDD Review @ NikKTech
- Patriot Supersonic Magnum 256GB USB 3.0 Flash Drive @ eTeknix
- Kingston DataTraveler Ultimate 3.0 G3 32 GB @ techPowerUp
Subject: Storage, Shows and Expos | February 25, 2013 - 02:12 PM | Jeremy Hellstrom
Tagged: ocz, ssd, PCIe SSD, CeBIT 2013, ZD-XL Accelerator
SAN JOSE, CA—February 25, 2013—OCZ Technology Group, Inc. (Nasdaq:OCZ), a leading provider of high-performance solid-state drives (SSDs) for computing devices and systems, today announced that it will preview a variety of enterprise storage solutions at next week’s CeBIT 2013 conference in Hannover, Germany. As a renowned global forum, CeBIT represents a great opportunity for attendees to be the first to see and experience the latest innovations in solid-state storage from an industry leader in enterprise SSDs, virtualization, and caching software. OCZ offers a complete suite of storage solutions that address VMware, Linux, and SQL Server platforms, and invites IT decision-makers who are evaluating or implementing solid-state storage in the data center to visit the Company’s exhibit in Hall 2, Stand E43, from March 5th through 9th.
OCZ will unveil the next-generation ZD-XL SQL Accelerator, a culmination of enterprise hardware and software converging as one tightly integrated and optimized solution. The ZD-XL Accelerator addresses SQL Server database applications to not only ensure that the data for this implementation is right, relevant, and readily available on SSD flash when the SQL Server needs it, but also that the data is accessed with the highest possible I/O performance. For simple deployment and ease of use, this tightly integrated, optimized solution features ‘implementation wizards’ to guide DBAs so they can optimally manage data cached to the flash. While showcasing the ZD-XL solution OCZ will invite enterprise customers to become beta testers for this exciting solution.
Also included in OCZ’s exhibition at CeBIT will be demonstrations to preview the upcoming VXL 1.3 Virtualization Software and LXL Acceleration Software with OCZ’s innovative Direct Pass Caching Technology, which not only addresses VMware but is also optimized for Linux applications. OCZ is one of the few SSD providers with a robust portfolio of virtualization and caching software that combine the power of flash acceleration with the power of storage virtualization. This enables multiple virtual server loads to run concurrently on a single physical host, not only increasing CPU and memory resource utilization, but also simplifying deployment, high availability (HA), and maintenance of the server loads.
The next-generation of workstation PCI Express (PCIe)-based SSDs will also be available soon as part of the Company’s award-winning Vector Series. These drives reside directly on the PCIe bus and will support four PCIe Gen2 lanes providing lower latency to data, faster file transfers and system boot-ups, expanded storage capacities, and an even quicker, more responsive experience over the already blazingly fast SATA 3.0-based Vector Series. The Vector PCIe Series will feature an advanced suite of flash management tools that deliver enhanced drive endurance and data, making it ideally suited for power computing, content creation, and workstation applications.
Subject: Storage | February 22, 2013 - 01:33 PM | Jeremy Hellstrom
Tagged: Samsung 840, Samsung, ssd, 120gb, Samsung MDX
[H]ard|OCP just wrapped up a review of the 120GB Samsung 840, using their own ARM Cortex R4 based MDX controller and TLC memory for storage. They compare the speed of this drive to the 256GB 840 Pro, Kingston's V300 120GB and the Intel 335 240GB to contrast the difference the type of NAND used can make to performance. This is especially evident on the write and latency benchmarks, which fall well behind the competition. From [H]'s testing it is apparent that TLC memory is very vulnerable to reduction in size, the reduced channels really hurt performance and put the 120GB model far behind the larger sized 840s which they have tested with much better results.
"The 120GB Samsung 840 Series SSD features the powerful 8-channel MDX controller and TLC NAND. While this value SSD comes at a very good price, it also features much lower speeds than its larger capacity brethren. We put this value SSD through our suite of steady state tests to see if it can pass muster."
Here are some more Storage reviews from around the web:
- Mushkin Atlas 480GB SSD Review - Performance Meets Capacity In The Ultra World @ SSD Review
- MyDigitalSSD BP4 Slim 7 Series SSD @ SSD Review
- Corsair Neutron GTX 240GB SSD Review @ Techgage
- OCZ Vector 256GB Solid State Drive Review @ Pro-Clockers
- Kingfast F3 Plus SSD @ SSD Review
- TRIM Check: Overview of an essential SSD TRIM functionality tester @ Tweaktown
- Seagate Constellation ES.3 4TB Enterprise Hard Drive Review @ Techgage
- Two 2 Bay NAS Review: Synology DiskStation DS213+ and QNAP TS-269 Pro @ Custom PC Review
- Vantec NexStar NST-D300WS3 WiFi HDD Dock Review @ Hi Tech Legion
- LaCie 5big Thunderbolt: super-fast 20TB NAS device @ Hardware.info
- ASUSTOR AS-604T 4-bay NAS Server for Home and Small Business Review @ Madshrimps
- Asustor AS-604T NAS review: Worthy new competitor for QNAP and Synology @ Hardware.info
- ADATA DashDrive Elite 500GB - External USB3.0 Hard Drive @ FunkyKit
- Icy Dock Blizzard HDD Enclosure & EZ-Dock Docking Station @ Silent PC Review
- Patriot SuperSonic Magnum 256GB USB 3.0 Drive @ Kitguru
- ADATA DashDrive Air AE400 Wireless Storage Reader Review @ Custom PC Review
- Patriot Gauntlet 320GB Wireless Hard Drive @ eTeknix
Taking an Accurate Look at SSD Write Endurance
Last year, I posted a rebuttal to a paper describing the future of flash memory as ‘bleak’. The paper went through great (and convoluted) lengths to paint a tragic picture of flash memory endurance moving forward. Yesterday a newer paper hit Slashdot – this one doing just the opposite, and going as far as to assume production flash memory handling up to 1 Million erase cycles. You’d think that since I’m constantly pushing flash memory as a viable, reliable, and super-fast successor to Hard Disks (aka 'Spinning Rust'), that I’d just sit back on this one and let it fly. After all, it helps make my argument! Well, I can’t, because if there are errors published on a topic so important to me, it’s in the interest of journalistic integrity that I must now post an equal and opposite rebuttal to this one – even if it works against my case.
First I’m going to invite you to read through the paper in question. After doing so, I’m now going to pick it apart. Unfortunately I’m crunched for time today, so I’m going to reduce my dissertation into the form of some simple bulleted points:
- Max data write speed did not take into account 8/10 encoding, meaning 6Gb/sec = 600MB/sec, not 750MB/sec.
- The flash *page* size (8KB) and block sizes (2MB) chosen more closely resemble that of MLC parts (not SLC – see below for why this is important).
- The paper makes no reference to Write Amplification.
Perhaps the most glaring and significant is that all of the formulas, while correct, fail to consider the most important factor when dealing with flash memory writes – Write Amplification.
Before geting into it, I'll reference the excellent graphic that Anand put in his SSD Relapse piece:
SSD controllers combine smaller writes into larger ones in an attempt to speed up the effective write speed. This falls flat once all flash blocks have been written to at least once. From that point forward, the SSD must play musical chairs with the data on each and every small write. In a bad case, a single 4KB write turns into a 2MB write. For that example, Write Amplification would be a factor of 500, meaning the flash memory is cycled at 500x the rate calculated in the paper. Sure that’s an extreme example, but the point is that without referencing amplification at all, it is assumed to be a factor of 1, which would only be the case if you were only writing 2MB blocks of data to the SSD. This is almost never the case, regardless of Operating System.
After posters on Slashdot called out the author on his assumptions of rated P/E cycles, he went back and added two links to justify his figures. The problem is that the first links to a 2005 data sheet for 90nm SLC flash. Samsung’s 90nm flash was 1Gb per die (128MB). The packages were available with up to 4 dies each, and scaling up to a typical 16-chip SSD, that only gives you an 8GB SSD. Not very practical. That’s not to say 100k is an inaccurate figure for SLC endurance. It’s just a really bad reference to use is all. Here's a better one from the Flash Memory Summit a couple of years back:
The second link was a 2008 PR blast from Micron, based on their proposed pushing of the 34nm process to its limits. “One Million Write Cycles” was nothing more than a tag line for an achievement accomplished in a lab under ideal conditions. That figure was never reached in anything you could actually buy in a SATA SSD. A better reference would be from that same presentation at the Summit:
This shows larger process nodes hitting even beyond 1 million cycles (given sufficient additional error bits used for error correction), but remember it has to be something that is available and in a usable capacity to be practical for real world use, and that’s just not the case for the flash in the above chart.
At the end of the day, manufacturers must balance cost, capacity, and longevity. This forces a push towards smaller processes (for more capacity per cost), with the limit being how much endurance they are willing to give up in the process. In the end they choose based on what the customer needs. Enterprise use leans towards SLC or eMLC, as they are willing to spend more for the gain in endurance. Typical PC users get standard MLC and now even TLC, which are *good enough* for that application. It's worth noting that most SSD failures are not due to burning out all of the available flash P/E cycles. The vast majority are due to infant mortality failures of the controller or even due to buggy firmware. I've never written enough to any single consumer SSD (in normal operation) to wear out all of the flash. The closest I've come to a flash-related failure was when I had an ioDrive fail during testing by excessive heat causing a solder pad to lift on one of the flash chips.
All of this said, I’d love to see a revisit to the author’s well-structured paper – only based on the corrected assumptions I’ve outlined above. *That* is the type of paper I would reference when attempting to make *accurate* arguments for SSD endurance.
SAN JOSE, CA—February 19, 2012—OCZ Technology Group, Inc. (Nasdaq:OCZ), a leading provider of high-performance solid-state drives (SSDs) for computing devices and systems, today announced a new 20 nanometer (nm) NAND flash version of its award-winning Vertex 3 SSD Series. The new Vertex 3.20 SSD is a 2.5-inch, 6Gbps SATA III-based Multi-Level Cell (MLC) drive that implements the feature-set of the Vertex 3 Series but is built around smaller, state-of-the-art NAND flash process geometry.
Being that the Vertex 3 Series is one of OCZ’s most popular SSDs to date, and has received numerous accolades from media reviewers globally, the implementation of 20nm NAND flash will extend its availability and enable mainstream users of mobile and desktop platforms to improve gaming, multimedia, and the overall computing experience over traditional hard disk drives (HDDs) and other competing SSDs. The Vertex 3.20 SSD will be available in 120GB and 240GB storage capacities, with 480GB capacities to follow soon.
Utilizing the proven and effective LSI SandForce® SF-2200 processor, the Vertex 3.20 SSD delivers exceptional performance of synchronous 20nm NAND flash supporting read bandwidth up to 550MB/s, write bandwidth up to 520MB/s, random read performance up to 35,000 input/output operations per second (IOPS), and random write performance up to 65,000 IOPS. It is also optimized to provide excellent endurance and reliability coupled with power efficiency.
“OCZ is always looking for ways to deliver superior solid state drive storage performance and features, as well as making this technology more accessible to the complete range of customers,” said Daryl Lang, Senior Vice President of Product Management for OCZ Technology. “The Vertex 3 has been a popular SSD series among consumers and implementing the newer, smaller process geometry will not only extend its life, but enables mainstream users with an excellent computing experience at a competitive price point.”
The Vertex 3.20 SSD is supported by a 3-year warranty to ensure customer satisfaction and will be available shortly through OCZ’s global channel in 120GB and 240GB storage capacities.
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