This driver is only intended to work with legacy 1394 host controllers. Therefore, you may experience lower transfer data rates than the 1394b driver. The driver is intended to resolve compatibility issues for 1394 peripherals on 1394b systems. Solved: After entering the serial # for my laptop on hp.com, no Windows 10 drivers are offered for the JMicron Media Card Reader. I used the one for - 6798460. Choose the General Tab. At the bottom, you should see a message saying 'System software from developer 'Legacy Developer: Jmicron' was blocked from Loading'. Under that message in the bottom left of the window, there should be a little lock symbol. If you click that, you should be able to enter the credentials for your MAC. With every new Apple OS comes new features and new challenges. MacOS High Sierra has improved security features that now require the user to enable the syste. JMicron Technology Corporation is an industry-leading IC design company specializing in designing high-speed data and signal interfaces bridge controller between USB 3.2 20Gbps, PCIe Gen4, SATA 6Gbps and UFS 2.1. As well as the SATA port multipliers and port selectors.

Introduction
Technical Specifications
A Closer Look
Sequential Read
Sequential Write
Random Read
Random Write
Mixed Workloads
128KB Sequential Mixed-Workload Steady State Performance
4KB Random Write Steady State Performance
PCMark 8 Real-World Software Performance
Total Storage Bandwidth
PCMark 8 Advanced Workload Performance
Latency Tests
Notebook Battery Life
Conclusion

Introduction
Technical Specifications
A Closer Look
Sequential Read
Sequential Write
Random Read
Random Write
Mixed Workloads
128KB Sequential Mixed-Workload Steady State Performance
4KB Random Write Steady State Performance
PCMark 8 Real-World Software Performance
Total Storage Bandwidth
PCMark 8 Advanced Workload Performance
Latency Tests
Notebook Battery Life
Conclusion

JMicron sent over three SSD configurations that use the new JMF670H controller and are paired up with brand new flash memory.

The road leading to Computex is paved with engineering samples. Over the next few days, you’ll see us testing new controllers from JMicron and Phison, both with fresh flash configurations that we haven’t seen used on retail products yet.

First up is JMicron, which sent over three parts in configurations we’re expecting to see from partners at Computex. The JMF670H controller was first demoed a year ago in Taipei, but is now coming out of its development stage. This four-channel processor will compete in the low-cost mainstream category against Silicon Motion’s SM2246EN and upcoming SM2256 controllers (the latter previewed on Tom’s Hardware just a few months ago). Phison also has alternative in this segment, such as the S8 and S9 controllers that are already shipping.

We’ve talked about the race to the bottom. The mainstream space is where the large volume is. NAND flash makes up the bulk of an SSD’s bill of materials, so in order to hit lower prices, the flash has to cost less. NAND comes from wafers, the price of which is fixed. If you want cheaper flash, you need to harvest more dies per wafer. This creates a big (or in this case small) catch-22. The smaller you shrink the manufacturing process, the less insulation there is between flash cells, causing problems with endurance and data retention.

Overcoming those issues requires more powerful controllers able to cope with beefier error correction. So now we have this issue where the cost of flash is going down, necessitating sophisticated (and increasingly expensive) processors. This adds cost, but ultimately shifts the burden of maintaining reasonable pricing to the controller vendor, and not the giant flash fabs.

SSD controllers have always played a large part in our coverage of solid-state storage. But their importance will increase not only as it pertains to performance, but also endurance. In the years leading up to now, keeping flash healthy was relatively easy. We’re on the final steps of 2D planar flash though, with program/erase cycles dipping down to 500. NAND flash manufacturers are combating this two ways. The first is with 3D cell structures that pack more bits into the same amount of space. Samsung is already shipping 3D V-NAND technology in its 850 Pro and 850 EVO. IMFT (Intel Micron Flash Technology) announced a 3D strategy but retail products will not come to market for some time. Flash Forward, the partnership between Toshiba and SanDisk, recently announced BiCS, its 3D NAND product.

With 3D cell structures still a way out for most flash makers, steps to extend the life of 2D planar NAND were taken. Pseudo SLC (pSLC) has played a large role in mainstream SSDs for some time now. Samsung introduced TurboWrite with the 840 EVO in 2013. SanDisk released similar technology to TurboWrite, calling it nCache.

Just a few weeks back, IMFT announced FortisFlash, a product name for what was once simply referred to as MLC+. FortisFlash is a component of L95B, the same 16nm flash found in Crucial’s MX200 and Micron’s M600. Micron used Dynamic Write Acceleration to describe the M600’s pSLC functionality.

We normally associate pSLC write modes with performance increases, but the technology also helps extend endurance as well. In the latter stages of 2D planar NAND, this is imperative. The short of it is that in order to take advantage of modern flash technologies, companies need new controllers with more horsepower.

Technical Specifications

SATA

Compliant with Serial ATA International Organization: Serial ATA Revision 3.1.
Supports one-port 1.5/3.0/6.0Gb/s SATA I/II/III interface
Supports ATA-8 command set

CPU

32-bit embedded processor – ARM9 base instruction set
32KB embedded masked program ROM
192KB embedded system RAM with ITCM

Flash

Support maximum 8CE’s Flash per channel
Support Toshiba/SanDisk 32/24/19/15nm flash
Support Intel/Micron 25/20/16nm flash
Support legacy/Toggle 1.0/Toggle 2.0 mode flash
Enhanced endurance by dynamic/static wear-leveling
Supports 4K/8K/16K bytes page size
Supports dynamic power management
SMART (Self-Monitoring, Analysis and Reporting Technology)
Data integrity under power-cycling
Supports BCH 60/72-bit ECC
Support Shift read feature of NAND flash when ECC fail

SDRAM

Supports one module DDR3
Support up to 4Gb

System

Integrated SATA III port and four-channel flash controller
LED indicator for SATA read/write access (optional)
LED indicator for SATA PHY link up (optional)
Provides 22 GPIO pins for customer
Provides UART and JTAG for software debugging
Built-in power-up self-test (BIST)
Manual and automatic self-diagnostics
Provides voltage low detect interrupt
288-ball TFBGA package

Firmware

Supports online SATA firmware update
Support 1/2/4/8 banks selected free
Firmware supports 1/2/4 channels selected free

The JMF670H controller uses powerful BCH ECC for MLC flash, so we suspect that this part will have a short life-cycle. JMicron plans to introduce a new processor specifically tailored for TLC NAND in the future. Hopefully we learn more about the JMF810 and JMF811 controllers at Computex, ahead of products shipping in 2016.

JMF670H improves upon the JMF667H controller currently in use by several SSD manufacturers. The JMF670H supports both Toshiba/SanDisk 15nm MLC, SK hynix 16nm MLC and Intel/Micron (IMFT) 16nm flash, as well as legacy flash. We’ll take a look at two types of flash today.

Legacy Developer Jmicronとは

IMFT’s 16nm flash has been shipping for around a year now. In fact, Crucial released the BX100 and MX200 at CES last January, both with Micron 16nm NAND. The MX200 family has a few capacity sizes with pSLC, though not all models utilize the new feature. Crucial tells us that the larger drives don’t require pSLC.

Micron says this about FortisFlash: “Get the performance of high-speed MLC while boosting endurance with our 20nm and 16nm FortisFlash devices, which come in standard BGA packages of one to 16 die stacks. With FortisFlash NAND, you can count on higher endurance than standard MLC without the usage limitations of Enterprise MLC (eMLC). Pair FortisFlash with advanced ECC methods, and you can exceed the standard 3000 write/erase cycles and see endurance levels over 10,000 P/E