Jmicron Usb Drive

[Guilleuma Deeken]

Ourexpertise in high-speed physical layer (PHY) of USB and SATA formats, as well as excellence in RAID hardware design enables JMicron to provide a wide selection of data storage controllers. By combining these controllers as building blocks, customers can not only configure their hard disk drives (HDDs), but solid state drives (SSDs) as well. External data storage devices can be used for redundant data storage, additioanl data storage, or convenient data retrieval from the field.

There's more than one way to make a hard drive copy, but when time is money, a HDD duplicator is the best option. It's faster and simpler to utilize a HDD duplicator when duplicating multiple disks. A hard drive duplicator is designed specifically for making one or more copies, often without tying up a computer that might be needed for other functions. Using HDD duplicating software packages are typically much more complicated and time-consuming to use compared to the few button pushes it takes to clone an HDD using a duplicator.

For some organizations and individuals that work with hard drives on a regular basis turn to HDD duplicators for fast and accurate copies, increasing productivity and reducing costs. JMicron provides a simple, fast and reliable drive copying solution without using computer. The controller is suitable for any SATA HDD to be connected with the source and target port.

JMicron has provided a series of HDD duplicator controllers to the industry for years. The products can supports a variety of configuration for clients to build a HDD duplicator or an external HDD dock when works with PC host. Furthermore, most of products support Port Multiplier and hardware RAID engines in order to accelerate the performance.

The JMB391 is a best-in-class selection for a 1:4 high-speed and high-reliability HDD duplicator. The controller supports a 1:5 SATA Port Multiplier with RAID 0/1/10 hardware capability. The performance of data duplication can be accelerated by its hardware RAID engines.

If you have ever tried to use a USB3.0 hard drive enclosure based on a JMicron chipset with TrueNAS (formerly FreeNAS); you may have come across multipath errors or serial numbers that make no sense. Or simply SMART and TRIM not functioning.

Additionally, you may have run into the stupid way these units power down the drives after 10 minutes of inactivity forcefully. Completely ignoring OS or HDD settings. This is infuriating if you want the drives to do what you tell them.

I have found that using a very specific build of the firmware for these enclosures, and then not programming the configuration area results in the enclosure passing through both the correct drive information and allows smart/trim to work!

The firmware version that I found the most reliable for me is the one that was posted to gbatemp by Wanderson Boy Rodrigues. This was also one of the few downloads that include the required windows software.

This is an incredibly safe as the JMicron devices have a burned in bootloader that lets you recover if you ever flash the wrong thing.Additionally, these devices use an external SPI flash for the firmware + config. This means that recovery is very simple worst case.

I have re-hosted the required files to flash the firmware here for convenience in case they are ever lost to time.You will need to use a Windows machine to use the JMicron software or you can probably use the Odroid tool on an arm64 sbc (untested).

The way that this works is that we want to reset all of the configuration memory to be blank (so that the device runs on defaults), and we also want to run a firmware that defaults to sane values and has auto-sleep defaulting to being turned off (some default to 10 minutes).

You will need to open your enclosure to get to the PCB. Near the main interface IC, there will be a small 8 pin SOIC that is storing the device firmware. Lookup the part number of the top of the chip to confirm its a flash IC.

You may need to try this a few times, testing longer or shorter times of holding the pin to ground, not 1000% on this, but I have had it work every time for me eventually. I use thin-tipped tweezers to make this easier to perform.

I have a USB 3.0 drive that appears in OMV5 as JMicron (vendor) attached to my system. If the system goes to sleep and the external drive powers down, when the system wakes and the usb drive wakes, the external drive has a new device id.

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 Windows 8.1 (sp57014) with no errors, but has a later driver been released?

Currently sitting next to a machine with an ASUS P5VD2-X motherboard and the apparantly infamous JMicron SATA controller. No matter what I try, I can't get my hard disk to appear in Disk Utility. I know the disk has JMicronATA.kext on it, I see it spew a bunch of stuff to the console on boot. I tried setting the controller to AHCI/RAID mode instead of IDE mode; doesn't work. All I see is the two IDE devices (DVD-RW and DVD-ROM drives) and no SATA devices.

Jmicron sata ahci doesn't need patches from a retail disk it just works! So don't screw around with JmicronATA.kext its just for the "ide ATA/PATA port" which I rather not use because of 2 gig ram kernel panic bug! It works on "ASUS P5k-e wifi ap" and maybe many other asus boards, also on p35/p45/x58 gigaybyte boards!

Second, I'm currently using Kalyway 10.5.2. I haven't screwed around with the JMicronATA.kext; I don't need to since I'm using SATA drives. I do not know if whoever prepared Kalyway slipstreamed a modified kext into the disk. Should I try using retail Leopard instead? I'm aware that other people have gotten this particular controller to work by setting it to AHCI mode.

Can u tell me what kexts are you using? I can make my controller to find the IDE HD but i get an input/output error and i cant mount the HD, if you could share the kexts you use for your install would be great.

i've got the same problem as above and read a lot of content on "how to solve" the problem. 'cause i' m really really new to this i don't have the sligthest idea on how to include the needed kexts into the installation dvd.....

Yesterday, while I was trying out my new hard drive, I noticed that it apparently took ages to defragment. Not only that, but it also took away a major amount of resources. Funnily enough, the CPU usage didn't show up at all in the task manager (I'm using Windows XP x64 Professional). However, the mouse cursor was lagging behind and whenever I played audio or video - be it a YouTube video or an actual video in VLC - it lagged there as well.

My first guess was that there was a hardware failure. Probably with the new hard drive because my others all worked, right? Technically it was unlike for my new hard drive to be damaged though as I formatted it the day before (with TrueCrypt) and it showed around 90 MB/s of formatting speed.

After a series of rebooting and benchmarking via HD Tune (also in Windows Safe Mode) I realized that at the start (basically the first time after a bootup) the hard drive worked fine with an average of about a 100 MB/s transfer rate. However, at around 60%+ it sunk drastically to a minimum of 1.4 and a maximum of 1.5 MB/s. It stayed there till the end of the benchmark and for every following one (until you rebooted).

Next thing I did was to change the BIOS settings for the JMicron SATA/PATA Controller from Enabled / IDE to Enabled / AHCI. After the Windows bootup it recognized a new Primary IDE channel, Secondary IDE channel, Standard Dual Channel PCI IDE Controller and one of my two optical drives (why only one? Don't ask me :D). The hard drive didn't show up at all - neither in the Disk Management nor in the Device Manager. A change from Enabled / AHCI to Enabled / RAID (with "no raid" in the JMicron settings) did the same thing: recognition of new channels and no new hard drive.

When I looked that the Device Manager I found that there were two SATA controllers in the IDE ATA/ATAPI controllers category. One was the Intel(R) ICH8 2 port Serial ATA Storage Controller - 2825 and the other one was the Intel(R) ICH8 4 port Serial ATA Storage Controller - 2820. My main / old hard drives are all hooked to the 4 SATA ports on the lower half of the P5B, some of them using an eSATA to SATA cable. So that had to be the 4 port SATA controller, which worked fine. Thus, the 2 port controller was the one controlling the eSATA port in the back pane - and making trouble.

The moral of the story is that obviously the JMicron SATA/PATA Controller doesn't do his job on the ASUS P5B at all. So, in case you're looking for more SATA ports, you're going to have to buy a new SATA controller.

"The Hub and all the drives work properly except if they are connected with some new USB 3.1 to Sata external enclosures I got. These new enclosures use a chip set from Jmicron. (JMS576) The drives when connected with the new enclosure will mount and can be accessed and shared but will either not spin down at all or will not spin up properly if they did actually spin down.

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