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  1. #51
    ROG Guru: Platinum Belt Array hmscott PC Specs
    hmscott PC Specs
    Laptop (Model)Asus G750JH-DB71 (legacy)
    MotherboardAsus G750JH Intel HM87
    ProcessorIntel i7-4700HQ XTU Cores 36x/35x/34x/34x Cache 36x -50mV undervolt
    Memory (part number)Hyundai Electronics HMT41GS6AFR8A-PB 1.35v DDR3L-1600MHz
    Graphics Card #1Nvidia 780m Asus GPU Tweak OC 932mhz/6300mhz
    Sound CardRealtek v6.0.1.7469 driver
    MonitorAUO B173HW02 V1 Custom Refresh 85hz
    Storage #1RAID0 2x M.2 SATA Crucial MX200 512GB CT500MX200SSD6
    Storage #2Crucial 512GB 2.5" MX200 CT500MX200SSD1
    Power Supply230w AC Power Adapter 19.5v
    Keyboard Logitech k400 Wireless KB/Trackpad
    Headset Sony MDR-XB500 Wired and Sennheiser RS-220 Wireless TOSLINK
    OS Windows 8.1 + 8 Linux VM's + Windows 10 Technical Preview
    Network RouterAsus RT-AC68U DLINK DIR-655

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    WoodburyMan, nice testing, it sounds like a definite problem for your devices and the left side USB 3.0 ports. Funny how Asus couldn't just duplicate the function of the right side ports to the left side ports, seems the same adapter could be used as well. I won't if you could order a spare part from the right side and fit it to the left side... probably a form factor consideration, but if ya got a Dremel tool...

    I have run an unpowered external USB 3.0 enclosure with my 512GB Samsung Pro 840 on all 4 ports and had the same high trasnfer rates, over 300MB/sec, on all 4. I ran those tests when there were posts about incompatibility issues with USB ports on the G750, as you pointed out. There were nowhere near as many posts about it then as there are now, there seems to be a much higher compatibility failure rate now as then.

    This is the USB 3.0 Enclosure I am using, as it seems to be compatible at high speeds on all 4 ports, it might be worth exploring for your own use.

    USB 3.0 to IDE/SATA 6Gb/s 2.5" Enclosure JU-SA0H11-S1
    SuperSpeed USB 3.0 tool-less aluminum 2.5” hard disk enclosure for both IDE and SATA hard drives
    http://www.siig.com/usb-3-0-to-ide-s...enclosure.html

    SIIG SuperSpeed USB 3.0 2.5-Inch SATA or IDE 6Gb/s Enclosure (JU-SA0H11-S1) - They also list a 3.5" version, but I haven't tried that.
    http://www.amazon.com/SIIG-SuperSpee...rive+Enclosure

    Back then we determined that some devices were compatible, and some weren't, not sure how that maps on to the G751 experience...

  2. #52
    ROG Guru: Green Belt Array
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    I was using my mouse and kb off the left side though figured I would test this out. At first I was running the 204 bios as that was the latest and greatest from this site off the ASUS home page: http://www.service.asus.com/#!downloads/c1wax . This led to the same issues everyone else is experiancing.

    I tested against two external USB 3.0 disk. A WD My Passport, and a Seagate hybrid drive in a generic (CD-R King) enclosure. Both connected and showed up fine however under load the WD would disconnect and the generic enclosure would bottom out to zero data being transferred then pick back up after a while...

    Then I found this site http://www.asus.com/Notebooks_Ultrab...Desk_Download/ and it had the latest 205 BIOS for the JY.

    Now both disk perform flawlessly. BIOS 205 specifically addresses USB comparability issues. I only bother to mention as Beststevie's link is for the JT and I had assumed at first 205 was not available for the JYs due to the split listings on the two different support sites...

  3. #53
    ROG Guru: Yellow Belt Array
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    My posts are still unfixed with the 205 update and an external 3.5" WD drive. Exact same issue even after the update.

  4. #54
    ROG Guru: Green Belt Array
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    Quote Originally Posted by Richdog View Post
    My posts are still unfixed with the 205 update and an external 3.5" WD drive. Exact same issue even after the update.
    They make 3.5" bus powered external disk? Are you using a Y-cord for power? I would not expect a 3.5" disk to operate purely of bus power without one. If you had a system where it did work that way it probably didn't strictly follow USB specs, many laptops supply grater than 500ma it is not a defect if this laptop supplies USB spec amperage.

    I would actually be surprised if you could run any 3.5" drive off bus power at USB spec with a Y-cable.
    Last edited by joshindaphils; 12-08-2014 at 02:09 PM.

  5. #55
    ROG Guru: Yellow Belt Array
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    Quote Originally Posted by joshindaphils View Post
    They make 3.5" bus powered external disk? Are you using a Y-cord for power? I would not expect a 3.5" disk to operate purely of bus power without one. If you had a system where it did work that way it probably didn't strictly follow USB specs, many laptops supply grater than 500ma it is not a defect if this laptop supplies USB spec amperage.

    I would actually be surprised if you could run any 3.5" drive off bus power at USB spec with a Y-cable.
    No, of course I do not run a 3.5" external hard disk off of the USB power but that was never my initial problem (I am the thread starter, details in OP)... the problem was transfer rates for this WD external disk, which crash to 0 and then cause a disconnection. Someone else also posted who also had the same issue with WD drives.

  6. #56
    ROG Guru: Platinum Belt Array hmscott PC Specs
    hmscott PC Specs
    Laptop (Model)Asus G750JH-DB71 (legacy)
    MotherboardAsus G750JH Intel HM87
    ProcessorIntel i7-4700HQ XTU Cores 36x/35x/34x/34x Cache 36x -50mV undervolt
    Memory (part number)Hyundai Electronics HMT41GS6AFR8A-PB 1.35v DDR3L-1600MHz
    Graphics Card #1Nvidia 780m Asus GPU Tweak OC 932mhz/6300mhz
    Sound CardRealtek v6.0.1.7469 driver
    MonitorAUO B173HW02 V1 Custom Refresh 85hz
    Storage #1RAID0 2x M.2 SATA Crucial MX200 512GB CT500MX200SSD6
    Storage #2Crucial 512GB 2.5" MX200 CT500MX200SSD1
    Power Supply230w AC Power Adapter 19.5v
    Keyboard Logitech k400 Wireless KB/Trackpad
    Headset Sony MDR-XB500 Wired and Sennheiser RS-220 Wireless TOSLINK
    OS Windows 8.1 + 8 Linux VM's + Windows 10 Technical Preview
    Network RouterAsus RT-AC68U DLINK DIR-655

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    Guys, it looks like Western Digital acknowledges the Disconnect problem between some USB 3.0 controllers and WD USB 3.0 devices, and has a fix available to apply to the drive to solve the problem.

    https://wdc.custhelp.com/app/answers.../p/228,195,465

    A USB 3.0 drive randomly disconnects and reconnects from a PC

    Answer ID 9588 | Last Updated 06/05/2014

    Problem:

    A USB 3.0 drive randomly disconnects and reconnects from the computer in one of the following scenarios: 1.Drives appear to disconnect and reconnect from the computer repeatedly while it is not transferring any data. This can be identified by notifications such as the sound of a USB device being disconnected or the pop-up on the bottom right of the screen.
    2.Autoplay dialog appears repeatedly after closing it, or the device temporarily disappears from the Explorer.
    3.The drive sometimes disconnects and immediately reconnects during small data transfers, which may cause an error message such as Delayed Write Failed.

    Cause:

    Western Digital has found that a small number of newer computer systems with USB 3.0, have a USB 3.0 Redriver vendor ASIC (Application-specific Integrated Circuit) - particularly with Intel USB 3.0 and Renesas (formerly NEC) host chipsets, when used with our USB 3.0 products with Initio CP48 Gen2 and Jmicron CP48 (FW 1.014 or higher) device controllers - may have problems interacting with the advanced power management features of the WD USB 3.0 drives.

    Solution:

    1.Resolution to the issue at hand requires to guide the Customer to disable the advanced USB 3.0 power management modes (known as U1/U2), on either the computer or the drive. WD can provide a software tool to the Customer which will disable the USB 3.0 power management modes on the WD drive and should permanently resolve the issue.
    2.Some USB 3.0 host adapters (typically Reneas [formerly NEC]) and their drivers, have an option to disable USB 3.0 power management functions. This is done within a vendor provided utility (USB 3.0 Host Controller Information) or in Windows Driver Details tab.
    3.Another option, if available, is to guide the Customer to connect the drive to a USB 3.0 hub, instead of directly to the computer. The reason is because many USB 3.0 hubs don't support the U1/U2 power management modes, and the issue may be resolved in this way. Ensure that the USB 3.0 hub's firmware is updated to the latest version.

    To determine if the system has a problem with U1/U2 power management, have the Customer connect the drive to a USB 2.0 port on the computer. If the drive does not disconnect and reconnect as before, it is safe to assume that the advanced power management feature is causing the issue in the USB 3.0 port.

    Make sure to let the Customer know that it is likely that the issue will occur most often when the drive is idle. With smaller, infrequent data transfers, the drive may disconnect during the data transfer resulting in an error message that the file transfer did not complete. During large data transfers, however, the device may stay connected as normal.

    U1U2.zip
    https://wdc.custhelp.com/ci/fattach/...ename/U1U2.zip

    Answers others found helpful
    • WD USB 3.0 hard drives disconnect or disappear when connected to a USB 3.0 hub
    • After connecting a USB 3.0 drive to a USB 3.0 hub, the drive does not appear under Computer or disappears after use
    • Updating firmware on a My Book or My Passport
    • Where to download software, utilities, firmware updates, and drivers for WD products (from the Downloads Library)
    • How to test a drive for problems using Data Lifeguard Diagnostics for Windows

    Check it out
    Last edited by hmscott; 02-04-2015 at 07:10 AM.

  7. #57
    ROG Guru: Yellow Belt Array
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    Very interesting thanks Scott, if it works I shall be very pleased!

  8. #58
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    Thing is, HM Scott, I'm having my issues with a Seagate 2TB USB Drive.

  9. #59
    ROG Guru: Platinum Belt Array hmscott PC Specs
    hmscott PC Specs
    Laptop (Model)Asus G750JH-DB71 (legacy)
    MotherboardAsus G750JH Intel HM87
    ProcessorIntel i7-4700HQ XTU Cores 36x/35x/34x/34x Cache 36x -50mV undervolt
    Memory (part number)Hyundai Electronics HMT41GS6AFR8A-PB 1.35v DDR3L-1600MHz
    Graphics Card #1Nvidia 780m Asus GPU Tweak OC 932mhz/6300mhz
    Sound CardRealtek v6.0.1.7469 driver
    MonitorAUO B173HW02 V1 Custom Refresh 85hz
    Storage #1RAID0 2x M.2 SATA Crucial MX200 512GB CT500MX200SSD6
    Storage #2Crucial 512GB 2.5" MX200 CT500MX200SSD1
    Power Supply230w AC Power Adapter 19.5v
    Keyboard Logitech k400 Wireless KB/Trackpad
    Headset Sony MDR-XB500 Wired and Sennheiser RS-220 Wireless TOSLINK
    OS Windows 8.1 + 8 Linux VM's + Windows 10 Technical Preview
    Network RouterAsus RT-AC68U DLINK DIR-655

    Join Date
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    Quote Originally Posted by BRSxIgnition View Post
    Thing is, HM Scott, I'm having my issues with a Seagate 2TB USB Drive.
    BRSxIgnition, the Seagate site is pretty opaque unless you have the model number, and dig a lot. Be patient when digging.

    http://www.seagate.com/support/

    You may be able to use one of the Seagate software support tools associated with your specific model USB 3.0 device to disable power management as discussed in the WD solution above. Try the Windows changes, and look for a Seagate program to do the same as mentioned in the WD solution.

    Good luck

  10. #60
    ROG Guru: Platinum Belt Array hmscott PC Specs
    hmscott PC Specs
    Laptop (Model)Asus G750JH-DB71 (legacy)
    MotherboardAsus G750JH Intel HM87
    ProcessorIntel i7-4700HQ XTU Cores 36x/35x/34x/34x Cache 36x -50mV undervolt
    Memory (part number)Hyundai Electronics HMT41GS6AFR8A-PB 1.35v DDR3L-1600MHz
    Graphics Card #1Nvidia 780m Asus GPU Tweak OC 932mhz/6300mhz
    Sound CardRealtek v6.0.1.7469 driver
    MonitorAUO B173HW02 V1 Custom Refresh 85hz
    Storage #1RAID0 2x M.2 SATA Crucial MX200 512GB CT500MX200SSD6
    Storage #2Crucial 512GB 2.5" MX200 CT500MX200SSD1
    Power Supply230w AC Power Adapter 19.5v
    Keyboard Logitech k400 Wireless KB/Trackpad
    Headset Sony MDR-XB500 Wired and Sennheiser RS-220 Wireless TOSLINK
    OS Windows 8.1 + 8 Linux VM's + Windows 10 Technical Preview
    Network RouterAsus RT-AC68U DLINK DIR-655

    Join Date
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    Guys, I checked, and at least my G750JH has Intel not Renesas USB controllers, and USB 3.0 hubs.

    And, I recall this issue before on the G750, and although my devices didn't exhibit disconnects, I had already gone through all the USB Hubs in the Device manager and unchecked the Power Management check box.

    Default setting "Allow the computer to turn off the device to save power" Enabled
    Click image for larger version. 

Name:	Device Manager USB Hub disable Power Management.JPG 
Views:	17 
Size:	51.6 KB 
ID:	43998

    Changed setting "Allow the computer to turn off the device to save power" to Disabled (unchecked)
    Click image for larger version. 

Name:	Device Manager USB Hub disabled Power Management.JPG 
Views:	15 
Size:	47.7 KB 
ID:	43999

    Try doing that for all the Hubs showing on your computer - mine had 5 Hubs showing. IDK if you need the USB device plugged in to have it show up... and after disabling all of them reboot and see if that helped.

    I don't know if that will be enough, you still might need to disable advanced power management on your external device with the vendor's tool, but at least this will stop Windows from powering it down, causing the disconnect.

    Good luck
    Last edited by hmscott; 02-03-2015 at 11:41 PM.

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