Subject: Storage | October 17, 2014 - 05:06 PM | Jeremy Hellstrom
Tagged: icy dock, ICY CUBE MB561U3S-4S, MB662U3-2S, external drive
Techgage has an assortment of Icy Dock products that they examined to make up this review. The ICY CUBE MB561U3S-4S is a 4-bay external drive enclosure, which will take all of the installed drives and create a single volume out of them. This happens automatically, there are no other RAID options available when you use this particular dock but it does simplify the setup process. The MB662U3-2S is a two bay enclosure which offers more choices for setup, you can set the drives to Large, JBOD, RAID 1 or RAID 0. If you just have a single drive, they also have an external 3.5” SATA HDD enclosure and finally two HDD caddies which slide into a 5.25" drive bay. The first can be set up to fit a pair of 2.5" drives and the second is for hotswapping. Check them out if you are in need of storage accessories.
"It has been quite some time since we have looked to see what ICY DOCK has been up to. This is a company that established its reputation by making some very good hard drive accessories through the years. In this article we are going to take a look at several offerings from the company – from mobile to desktop. Let’s see what it has to offer."
Here are some more Storage reviews from around the web:
- IronKey Workspace W700 Secure Flash Drive @ The SSD Review
- Synology DS415+ NAS @ HardwareHeaven
- Thecus N2310 @ Legion Hardware
- QNAP SilentNAS HS-251 2-Bay NAS @ eTeknix
- QNAP TS-451 Turbo NAS Server @ Benchmark Reviews
- Synology DiskStation DS415+ @ Legion Hardware
- Thecus N7710-G 7-Bay NAS with 10 GbE @ Silent PC Review
- Kingston M.2 2280 SATA 120GB SSD Review @ Hardware Canucks
- OCZ ARC 100 240GB SSD Review @HiTech Legion
- Micron M600 mSATA @ The SSD Review
Introduction and Features
EZ-Clone in Standalone disk-cloning mode
Kingwin’s new EZ-Clone (Model: USI-2535CLU3) is a HDD/SSD adapter that can be used as a standalone disk-cloning device or as an external hard drive adapter. When used in standalone mode, the self-powered EZ-Cone can quickly clone one SATA/IDE drive to a new SATA drive in minutes (IDE to SATA or SATA to SATA) without being connected to a PC.
EZ-Clone being used as an external drive adapter
When used as an external drive adapter the EZ-Clone provides connectors for attaching two SATA drives (SSD or HDD) and one IDE hard drive in 2.5” or 3.5” form factors. The EZ-Clone adapter connects to a PC using the high-speed USB 3.0 interface. When used as an external drive adapter, the user can access up to two external drives at the same time (two SATA drives or one SATA and one IDE drive).
Kingwin EZ-Clone Key Features: (from the Kingwin website)
• EZ-Clone model: USI-2535CLU3
• External USB 3.0 to dual-SATA & single-IDE clone adapter
• Standalone disk duplicator with One-Touch Clone Button (no PC required)
• Supports 2.5” and 3.5” IDE and SATA drives (HDD or SSD)
• Compatible with SATA I/II/III (1.5/3.0/6.0 Gbps)
• SATA Drive Hot-swap compatibility
• Supports hard drives up to 3TB disk size
• Dual output power supply with standard 4-pin and SATA power connectors
• Up to 5 Gbps data transfer rate with USB 3.0 (also compatible with USB 2.0)
• USB Plug-and-play capability
• 2 Drive LEDs (red) and four Clone Progress LEDs (blue)
• Screw-less, easy to attach connectors
• Windows and Mac OS compatible (no driver installation required)
• 1-Year Warranty from Kingwin
• MSRP $39.99 USD ($33.99 from Amazon.com, Oct. 2014)
** Edit **
The tool is now available for download from Samsung here. Another note is that they intend to release an ISO / DOS version of the tool at the end of the month (for Lunix and Mac users). We assume this would be a file system agnostic version of the tool, which would either update all flash or wipe the drive. We suspect it would be the former.
** End edit **
As some of you may have been tracking, there was an issue with Samsung 840 EVO SSDs where ‘stale’ data (data which had not been touched for some period of time after writing it) saw slower read speeds as time since written extended beyond a period of weeks or months. The rough effect was that the read speed of old data would begin to slow roughly one month after written, and after a few more months would eventually reach a speed of ~50-100 MB/sec, varying slightly with room temperature. Speeds would plateau at this low figure, and more importantly, even at this slow speed, no users reported lost data while this effect was taking place.
An example of file read speeds slowing relative to file age.
Since we first published on this, we have been coordinating with Samsung to learn the root causes of this issue, how they will be fixed, and we have most recently been testing a pre-release version of the fix for this issue. First let's look at the newest statement from Samsung:
Because of an error in the flash management software algorithm in the 840 EVO, a drop in performance occurs on data stored for a long period of time AND has been written only once. SSDs usually calibrate changes in the statuses of cells over time via the flash management software algorithm. Due to the error in the software algorithm, the 840 EVO performed read-retry processes aggressively, resulting in a drop in overall read performance. This only occurs if the data was kept in its initial cell without changing, and there are no symptoms of reduced read performance if the data was subsequently migrated from those cells or overwritten. In other words, as the SSD is used more and more over time, the performance decrease disappears naturally. For those who want to solve the issue quickly, this software restores the read performance by rewriting the old data. The time taken to complete the procedure depends on the amount of data stored.
This partially confirms my initial theory in that the slow down was related to cell voltage drift over time. Here's what that looks like:
As you can see above, cell voltages will shift to the left over time. The above example is for MLC. TLC in the EVO will have not 4 but 8 divisions, meaning even smaller voltage shifts might cause the apparent flipping of bits when a read is attempted. An important point here is that all flash does this - the key is to correct for it, and that correction is what was not happening with the EVO. The correction is quite simple really. If the controller sees errors during reading, it follows a procedure that in part adapts to and adjusts for cell drift by adjusting the voltage thresholds for how the bits are interpreted. With the thresholds adapted properly, the SSD can then read at full speed and without the need for error correction. This process was broken in the EVO, and that adaptation was not taking place, forcing the controller to perform error correction on *all* data once those voltages had drifted near their default thresholds. This slowed the read speed tremendously. Below is a worst case example:
We are happy to say that there is a fix, and while it won't be public until
some time tomorrow now, we have been green lighted by Samsung to publish our findings.
Subject: Storage | October 6, 2014 - 02:51 PM | Jeremy Hellstrom
Tagged: ssd, slc, mlc, micron, M600, Dynamic Write Acceleration
The Tech Report took a different look at Micron's M600 SSD than Al did in his review. Their benchmarks were focused more on a performance comparison versus the rest of the market, with over two dozen SSDs listed in their charts. As you would expect the 1TB model outperformed the 256GB model but it was interesting to note that the 256GB MX100 outperformed the newer M600 in many tests. In the final tally the new caching technology helped the 256GB model perform quite well but it was the 1TB model, which supposedly lacks that technology proved to be one of the fastest they have tested.
"Micron's new M600 SSD has a dynamic write cache that can treat any block on the drive as high-speed SLC NAND. This unique feature is designed to help lower-capacity SSDs keep up with larger drives that have more NAND-level parallelism, and we've tested the 256GB and 1TB versions to see how well it works."
Here are some more Storage reviews from around the web:
- MyDigitalSSD BP4e mSATA SSD @ The SSD Review
- Top 10 SSDs: Price, performance and capacity @ The Register
- Micron M600 M.2 SATA SSD @ The SSD Review
- Some thoughts on the performance of SSD RAID 0 arrays @ Hardware Secrets
- Transcend SSD370 128GB SSD Review @ Legit Reviews
- Micron M600 SSD @ The SSD Review
- QNAP TS-653 Pro @ Legion Hardware
- QNAP SilentNAS HS-251 NAS Server Review @ NikKTech
- Mach Xtreme MX-ES Ultra SLC USB 3.0 Flash Drive @ The SSD Review
- Silicon Power Marvel M70 64GB USB 3.0 Flash Drive Review @ NikKTech
Introduction and Test System Setup
A while ago, in our review of the WD Red 6TB HDD, we noted an issue with the performance of queued commands. This could potentially impact the performance of those drives in multithreaded usage scenarios. While Western Digital acted quickly to get updated drives into the supply chain, some of the first orders might have been shipped unpatched drives. To be clear, an unpatched 5TB or 6TB Red still performs well, just not as well as it *could* perform with the corrected firmware installed.
We received updated samples from WD, as well as applying a firmware update to the samples used in our original review. We were able to confirm that the update does in fact work, and brings a WD60EFRX-68MYMN0 to the identical and improved performance characteristics of a WD60EFRX-68MYMN1 (note the last digit). In this article we will briefly clarify those performance differences, now that we have data more consistent with the vast majority of 5 and 6TB Reds that are out in the wild.
Test System Setup
We currently employ a pair of testbeds. A newer ASUS P8Z77-V Pro/Thunderbolt and an ASUS Z87-PRO. Storage performance variance between both boards has been deemed negligible.
PC Perspective would like to thank ASUS, Corsair, and Kingston for supplying some of the components of our test rigs.
|Hard Drive Test System Setup|
|CPU||Intel Core i7-4770K|
|Motherboard||ASUS P8Z77-V Pro/TB / ASUS Z87-PRO|
|Memory||Kingston HyperX 4GB DDR3-2133 CL9|
|Hard Drive||G.Skill 32GB SLC SSD|
|Video Card||Intel® HD Graphics 4600|
|Power Supply||Corsair CMPSU-650TX|
|Operating System||Windows 8.1 X64 (Update 1)|
- PCMark Vantage and 7
- HDTach *omitted due to incompatibility with >2TB devices*
- PCPer File Copy Test
Introduction and Specifications
Today Micron lifted the review embargo on their new M600 SSD lineup. We covered their press launch a couple of weeks ago, but as a recap, the headline new feature is the new Dynamic Write Acceleration feature. As this is a new (and untested) feature that completely changes the way an SSD must be tested, we will be diving deep on this one later in this article. For the moment, let's dispose with the formalities.
Here are the samples we received for testing:
It's worth noting that since all M600 models use 16nm 128Gbit dies, packaging is expected to have a negligible impact on performance. This means the 256GB MSATA sample should perform equally to its 2.5" SATA counterpart. The same goes for comparisons against M.2 form factor units. More detail is present in the specs below:
Highlights from the above specs are the increased write speeds (no doubt thanks to Dynamic Write Acceleration) and improved endurance figures. For reference, the prior gen Micron models were rated at 72TB (mostly regardless of capacity), so seeing figures upwards of 400TB indicates Micron's confidence in their 16nm process.
Sorry to disappoint here, but the M600 is an OEM targeted drive, meaning its 'packaging' will likely be the computer it comes installed in. If you manage to find it through a reseller, it will likely come in OEM-style brown/white box packaging.
We have been evaluating these samples for just under a week and have logged *many* hours on them, so let's get to it!
Subject: Storage | September 25, 2014 - 06:36 PM | Jeremy Hellstrom
Tagged: corsair, Voyager Air 2, wireless hdd
The Corsair Voyager Air 2 is the second iteration of wireless drive, this years model coming with a 1TB drive, a totally redesigned shell and a $20 drop in price. Legit Reviews warns that while the price drop is appreciated it no longer comes with the charging kit which will cost you extra. It supports USB 3.0 and 802.11 b/g/n transfers as well as Internet passthrough, keep in mind that WiFi is disabled once the USB plug is connected. The overall speeds were in line with what was expected and the battery life is impressive for 720p streaming, though 1080p streaming drains it much more quickly. See the Voyager in action right here.
"Last year we took a look at Corsair’s first wireless hard drive, called Voyager Air, which was a very sleek and impressive unit that we really liked. Today, we’re going to take a look at the more recently revamped version, conveniently called Voyager Air 2. We’ll take a look and see what this drive all has to offer and if there is anything new brought to the table."
Here are some more Storage reviews from around the web:
- RAIDON Runner GR2660 SSD/HDD RAID Enclosure @ Kitguru
- Silicon Power Stream S03 2TB USB 3.0 Portable Hard Drive Review @ NikKTech
- QNAP TS-251 High Performance NAS for SOHO and Home Users Review @ Madshrimps
- Team Group Micro SDHC UHS-1 U3 32GB Review @ Madshrimps
- SanDisk Ultra II 240GB SSD Review @ Legit Reviews
- Corsair Force LX 256GB @ eTeknix
- Kingston SM2280S3 M.2 SATA 120 GiB SSD Review @ Hardware Secrets
- Kingston SM2280S3 M.2 SATA SSD @ The SSD Review
Subject: General Tech, Storage | September 21, 2014 - 08:41 PM | Scott Michaud
Tagged: ssd, Samsung, kingston hyper x, kingston, endurance, corsair neutron gtx, corsair, 840 pro
Many drives have died over the last year and a bit. The Tech Report has been torturing SSDs with writes until they drop. Before a full petabyte of data was written, three of the six drives kicked the bucket. They are now at 1500TB of total writes and one of the three survivors, the 240GB Corsair Neutron GTX, dropped out. This was a bit surprising as it was reporting fairly high health when it entered "the petabyte club" aside from a dip in read speeds.
The two remaining drives are the Samsung 840 Pro (256GB) and Kingston HyperX 3K (240GB).
Two stand, one fell (Image Credit: Tech Report)
Between those two, the Samsung 840 Pro is given the nod as the Kingston drive lived through uncorrectable errors; meanwhile, the Samsung has yet to report any true errors (only reallocations). Since the test considers a failure to be a whole drive failure, though, the lashings will persist until the final drive gives out (or until Scott Wasson gives up in a glorious sledgehammer apocalypse -- could you imagine if one of them lasted a decade? :3).
Of course, with just one unit from each model, it is difficult to faithfully compare brands with this marathon. While each lasted a ridiculously long time, the worst of the bunch putting up with a whole 2800 full-drive writes, it would not be fair to determine an average lifespan for a given model with one data point each. It is good to suggest that your SSD probably did not die from a defrag run -- but it is still a complete waste of your time and you should never do it.
Investigating the issue
** Edit ** (24 Sep)
We have updated this story with temperature effects on the read speed of old data. Additional info on page 3.
** End edit **
** Edit 2 ** (26 Sep)
New quote from Samsung:
"We acknowledge the recent issue associated with the Samsung 840 EVO SSDs and are qualifying a firmware update to address the issue. While this issue only affects a small subset of all 840 EVO users, we regret any inconvenience experienced by our customers. A firmware update that resolves the issue will be available on the Samsung SSD website soon. We appreciate our customer’s support and patience as we work diligently to resolve this issue."
** End edit 2 **
** Edit 3 **
The firmware update and performance restoration tool has been tested. Results are found here.
** End edit 3 **
Over the past week or two, there have been growing rumblings from owners of Samsung 840 and 840 EVO SSDs. A few reports scattered across internet forums gradually snowballed into lengthy threads as more and more people took a longer look at their own TLC-based Samsung SSD's performance. I've spent the past week following these threads, and the past few days evaluating this issue on the 840 and 840 EVO samples we have here at PC Perspective. This post is meant to inform you of our current 'best guess' as to just what is happening with these drives, and just what you should do about it.
The issue at hand is an apparent slow down in the reading of 'stale' data on TLC-based Samsung SSDs. Allow me to demonstrate:
You might have seen what looks like similar issues before, but after much research and testing, I can say with some confidence that this is a completely different and unique issue. The old X25-M bug was the result of random writes to the drive over time, but the above result is from a drive that only ever saw a single large file write to a clean drive. The above drive was the very same 500GB 840 EVO sample used in our prior review. It did just fine in that review, and at afterwards I needed a quick temporary place to put a HDD image file and just happened to grab that EVO. The file was written to the drive in December of 2013, and if it wasn't already apparent from the above HDTach pass, it was 442GB in size. This brings on some questions:
- If random writes (i.e. flash fragmentation) are not causing the slow down, then what is?
- How long does it take for this slow down to manifest after a file is written?
Subject: Storage | September 18, 2014 - 07:10 PM | Jeremy Hellstrom
Tagged: micron, M600, SLC. MLC, DWA
Micron's M600 SSD has a new trick up its sleeve, called dynamic write acceleration which is somewhat similar to the HDDs with an NAND cache to accelerate the speed frequently accessed data can be read but with a brand new trick. In this case SLC NAND acts as the cache for MLC NAND but it does so dynamically, the NAND can switch from SLC to MLC and back depending on the amount of usage. There is a cost, the SLC storage capacity is 50% lower than MLC so the larger the cache the lower the total amount of storage is available. As well the endurance rating is also higher than previous drives, not because of better NAND but because of new trim techniques being used. This is not yet a retail product so The Tech Report does not have benchmarks but this goes to show you there are plenty more tricks we can teach SSDs.
"Micron's new M600 SSD can flip its NAND cells between SLC and MLC modes on the fly, enabling a dynamic write cache that scales with the drive's unused capacity. We've outlined how this dynamic write acceleration is supposed to impact performance, power consumption, and endurance."
Here are some more Storage reviews from around the web:
- Adata's Premier SP610 @ The Tech Report
- A SCORCHIO fatboy SSD: Samsung SSD850 PRO 3D V-NAND @ The Register
- Silicon Power Blaze B06 64GB USB 3.0 Flash Drive Review @ NikKTech
- SanDisk Ultra II SSD Review (240GB) - TLC Memory becomes Mainstream @ The SSD Review
- Thecus N2310 2-bay NAS @ Kitguru
- QNAP TS-451 @ techPowerUp
- Kingston HyperX FURY 64GB USB 3.0 Flash Drive Review @ OCC