USB 3.0 External HDD only works on 1 USB port, rMBP 13

Hello all,
Last night I had a scare thinking that my WD MyPassport was corrupt because only one of my 3 partitions were showing up. I went into Disk Utility and attempted to mount the disk, only to get a message that I must repair it. I then realized that I plugged it into the right side of the computer, which is opposite of which I usually do. I removed the hard drive and switched ports, only to see that all three partitions magically appeared. Is there a reason this happened? Is there something wrong with my computer, or is this user error? I've never experienced this before.

Off the top of my head there could be two reasons for this. One is that the USB port is malfunctioning. The other is there is a chance the HD is pulling more power then the USB port can supply. One USB port will tend to be slightly higher power than the other. Is the HD powered by the computer or an external power supply? Was there anything plugged into the other USB port that may have been drawing power? It is best to not rely on USB bus power to power external hard drives. If the drive does not have its own power supply consider getting a powered USB hub. This should help.

Similar Messages

External keyboard only works after reboot with Port Replicator III Plus

The problem is that when I boot the notebook, the external PS/2 keyboard doesn't work. When I reboot the keyboard flips on and then I can use it.
This problem occurs on a Toshiba Tecra notebook with a Advanced Port Replicator III Plus. I've used several keyboards, so that isn't the problem. I've changed a value in the bios which is used for USB devices (mouse/keyboard). I disabled the option, because I use a PS/2 mouse and keyboard, but the problem isn't solved. I hope someone has an answer to this problem.

Hello
I presume that there is something wrong with docking procedure and touchpad. Try to disable the Touchpad while the Notebook is docked.
Try also to install mobile extensions again.

USB 3.0 port not recognising USB 3.0 external HDD

My HP Envy 14 Spectre does not recognise my new USB 3.0 external HHD when I plug it into the USB 3.0 port. I'm using Win 7 64-bit. I've only recently purchased this ultrabook and today was the first time for me to plug in a USB 3.0 external HDD (which works fine when I plug it in the other port which is the USB 2.0 port).

Hi:
See if the USB 3 driver directly from Intel works for you...
https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=22824&lang=eng

External Firewire-HDD only works in Win7 after Reconnect

Hello,
I use a 27" iMac with BootCamp 4.0 and Windows 7 64-bit. I connect an external HDD via the iMacs Firewire 800 port using a 9 to 4-pin cable.
This works fine, but only if I replug one of the connectors AFTER I switched the HDD on. Only switching it on take no effect; Windows explorer didn't show it!
I tried already the "OHCI-konformer IEEE 1394-Hostcontroller (Legacy)" drivers but with the same result - I alway have to reconnect the HDD every time i want to use it - gets on my nerves...
Any solution for this?
Thanks a lot!

Windows and FW800 never were supported and even FW400 is weak.
Thunderbolt devices are not hot pluggable and need to be present on startup in most cases.
USB3 is finding its way into Mountain Lion now that some Macs have them, and support in Windows 8, which gives more than enough bandwidth for any hard drive and most SSDs.
You can try a rescan in Storage in Computer Management.
eSATA and USB3 (and of course USB2) work fine with recognizing.

Mouse only working in one USB slot

This is more of an anoyance than a problem. I've recently purchaced a Logitech wireless mouse. It has one of those dongle things that you plug into the USB port. The only problem is, that it only works in the one port (one closest to the power). This happens in OS X and in Windows XP. I've tried it on an indentical machine and it works in both. Does anyone have any suggestions.
Oh, memory sticks / usb hdds etc work in both slots fine...
Thanks in advance for any help...

Ok, after reading a few other posts on here I did the SMC reset thing (take out battery and hold power button down). When I booted up the mouse worked in both slots. After a re-start it's back to the same place again, only working in one slot. Any advice on what I should do next?

External monitor only works with clam shell open

external monitor only works with clam shell open

Are you using the method in this Apple article? If you do, it should work.
Mac notebooks: How to use your computer in closed clamshell (display closed) mode with an external display

Can I use the old Time Capsule as an external HDD only?

how to make TC to be a new external because i dont need to back up things,just want to be External HDD,if work,can the files through by wifi ?

Hedwig Wang wrote:
i dont need to back up things
when you lose important files for the first time, you will see how wrong that statement is
how to make TC to be a new external
click here for instructions. once set up, time machine may ask you if you want to use the TC for backups but you can decline.
the TC will show up in the finder under the shared header. click on the icon and your computer will connect to the TC, when that's done, you will see a folder called Data, which actually is the TC's drive. click on the folder and the TC's drive will mount on your desktop.
now you can drag & drop files to it like with any ordinary external HD.
can the files through by wifi ?
yes.

Disabling Console or set it to only work on a different port.

Is there a way to disable the console or have it only work on a different port
in WLS 6.1?
The only way I've figured out to disable it is to remove the whole console application
from the system.

Yeshwant <[email protected]> wrote in message news:<[email protected]>...
The console is simply a webapplication and as such there is no way to have it work on
another port. It will run on the same port the appserver is running on .
If you don't need it just remove it .
yeshwant
Steven JOb wrote:
Is there a way to disable the console or have it only work on a different port
in WLS 6.1?
The only way I've figured out to disable it is to remove the whole console application
from the system.
Just a wild guess.
I have not try this but it looks very promising. Did you try to expand
the console.war file and then modify the weblogic.xml to remove
"system" from it and put in your own user, and then update the war and
jar back. In this way, only your special user can access it.
Regards
drit
Freelance Code Inspector / Java Developer
http://www.geocities.com/doc_i_t/CodeInspectionService.html

USB 3.0 External hard drive working only as USB 2.0

Hello all.
I have a MacBook Pro mid 2012 (specs below) which has two USB 3.0 ports. I have a Kingston USB 3.0 stick and a Toshiba 1TB USB 3.0 external hard drive. With Lion/Mountain Lion/Mavericks, both stick and hard drive worked fine, but since I updated to OS X 10.10 Yosemite, both work as USB 2.0 devices, with slow transfer speed and, in the case of the hard drive, it has a blue/white LED that indicates the mode (blue = USB 3.0 / white = USB 2.0) and it only lights up with white color.
It's not a device problem, because both work on Windows 8.x machines. I was guessing that it was some kind of firmware or motherboard's usb driver problem but I looked for firmware updates and found nothing.
Is anyone having issues with USB 3.0 ports? Can you help me with this? Any advice would help.
Thanks a lot for your patience and help.

Hi jesusbet,
Thanks for visiting Apple Support Communities.
It sounds like the USB 3 ports on your MacBook Pro are not operating at the expected speed.
The first troubleshooting step I'd suggest in this case is to reset the System Management Controller (SMC) on your MacBook Pro using these instructions:
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
From:
Intel-based Macs: Resetting the System Management Controller (SMC)
If the symptom continues, you can also reset the PRAM:
OS X Yosemite: Reset your computer’s PRAM
These two hardware resets can resolve many unexpected behaviors that affect hardware on a Mac.
All the best,
Jeremy

Strange issue with external monitor, only working when external speakers plugged in (using Thunderbolt to VGA adaptor)

Hey – I am having a very strange issue with my external monitor; where it only works if my external speakers are plugged in and connected.
I am using a late 2011 Macbook pro, running Mavericks 10.9.4, along with an MBox 2 (USB Audio Interface), and two powered speakers (KRK Rokit 5). This setup has had no issues. I have just acquired an external monitor (Benq T2200HD), which I am using with a thunderbolt to VGA adaptor (a cheap Chinese knockoff adaptor).
To start - I plugged the monitor in with the thunderbolt adaptor, and it powers up and works fine. However, there is a nasty buzz coming from the speakers. I did some research and it looks like a simple ground loop issue. I did a bit of troubleshooting, and this is where things get weird.
What I found is - If I unplug the MBox, the monitor loses signal from the computer (displaying ‘No Signal Detected!’). Further, if I keep the MBox plugged in, however unplug both the cables from the MBox to the speakers, the monitor loses signal. It doesn’t matter if the speakers are turned off, however they need to be plugged in (or the monitor loses signal). Weirder still, I can unplug the MBox, however the monitor will work if I plug in the speakers through my macs headphone jack.
Simply put, the monitor only works if there is a direct connection between the computer, the speakers, and the power source. What is going on here? Is the monitor grounding through the computer port, to the speakers (I don’t know how this works, is this possible?). Could it somehow be the cheap VGA adaptor I am using?
Some other information:
- Everything is plugged into the same multi-box for power. I have tried plugging things into separate sources, and the result is the same.
- If I unplug the thunderbolt adaptor, then the speaker noise disappears straight away.
- The ground noise doesn’t appear in my headphones, which are plugged into the MBox.
Any information would be great – am I missing something here, or is this genuinely weird?

Well, I went back into Best Buy to test on 3 other laptops (2 Asus, and their floor model for this Sony). It seems to be doing the same problem so at least I was able to rule out broken hardware issue on my particular laptop.
Here's what I did to test:
Since I couldn't really install Adobe Premiere on their machines, I used the DVIO software (http://www.carr-engineering.com/dvio.htm) and a 5 min clip I captured. I transferred onto their machines, hooked up my Sony D8, and attempted to play the video. It would play for 15 seconds and then stop and jitter with a loud noise (like it does on my laptop). I even tried changing each machine's firewire driver to the legacy one and same results. I pulled a brand new 4 pin to 4 pin firewire cable off their shelf and still the same problem.
I think I've nailed it down to Win7x64 bit Home Edition not playing nice with Firewire driver. Very annoying. I can't find any concrete evidence of this from other users on any of the forums that have my particular problem, but from my own testing, it's all I can conclude.
I have 2 other things I can try:
1. Opening the laptop and looking at the firewire to maybe find appropriate driver (ugh, I don't want to have to open this thing up).
2. Upgrading to Win7x64bit Pro and possibly testing with XP on the new MS Virtual PC (http://www.microsoft.com/windows/virtual-pc/). I can't do it with my Home edition apparantly.
Who needs to view video on an external TV anyways....sheeesh...(scarcasm).
Tim

Strange issue with external monitor, only working when external speakers plugged in

Hey – I am having a very strange issue with my external monitor; where it only works if my external speakers are plugged in and connected.
I am using a late 2011 Macbook pro, running Mavericks 10.9.4, along with an MBox 2 (USB Audio Interface), and two powered speakers (KRK Rokit 5). This setup has had no issues. I have just acquired an external monitor (Benq T2200HD), which I am using with a thunderbolt to VGA adaptor (a cheap non-apple adaptor).
To start - I plugged the monitor in with the thunderbolt adaptor, and it powers up and works fine. However, there is a nasty buzz coming from the speakers. I did some research and it looks like a simple ground loop issue. I did a bit of troubleshooting, and this is where things get weird.
What I found is - If I unplug the MBox, the monitor loses signal from the computer (displaying ‘No Signal Detected!’). Further, if I keep the MBox plugged in, however unplug both the cables from the MBox to the speakers, the monitor loses signal. It doesn’t matter if the speakers are turned off, however they need to be plugged in (or the monitor loses signal). Weirder still, I can unplug the MBox, however the monitor will work if I plug in the speakers through my macs headphone jack.
Simply put, the monitor only works if there is a direct connection between the computer, the speakers, and the power source. What is going on here? Is the monitor grounding through the computer port, to the speakers (I don’t know how this works, is this possible?). Could it somehow be the cheap VGA adaptor I am using?
Some other information:
- Everything is plugged into the same multi-box for power. I have tried plugging things into separate sources, and the result is the same.
- If I unplug the thunderbolt adaptor, then the speaker noise disappears straight away.
- The ground noise doesn’t appear in my headphones, which are plugged into the MBox.
Any information would be great – am I missing something here, or is this genuinely weird?

Hello cgoldberg11
Please go to the below link to test if you are having a speaker hardware failure.
Testing for Hardware Failures (Windows 7)
This will rule out hardware failure, let me know how that goes.
Thanks
If I have solved your issue, please feel free to provide kudos and make sure you mark this thread as solution provided!
Although I work for HP, my posts and replies are my own opinion and not those of HP. .....
Reguards,
Mo

Chieftec blackbox external HDD, not working with GX740 Windows 7.

Hi
I have a Seagate Momentus® 7200.4 750GB
SATA 3Gb/s, 16MB, 7200RPM, 2,5"
using it with Chieftec CEB-25S-U3 HDD Chassi
2,5", SATA, USB 3.0, Aluminium, Svart/Silver
and it doesnt seems like the computer is actually accepting it as a harddrive or something.
It does find it, but i cant format it or use it as a harddrive, its just there.
Ive had the same problem with another external hdd, it didnt work on my gx740 with windows7, but it did work on an older computer with windows xp.
Dunno if it has anything to do with it, but the ENE CIR Receiver doesnt seem to be working in the computer. I dont rly know what it is tbh, but its under the HID Human interface Devices section.
Tryed to update the driver, but it just says it the latest drivers allready.
Ive allso had problems with the Bluetooth not working, so maybe the ENE CIR thing is the cause of that =P
/Snorki

ENE CIR Receiver is the infra-red receiver for Media Center remote controls (CIR = Consumer InfraRed).
Quote
and it doesnt seems like the computer is actually accepting it as a harddrive or something.
It does find it, but i cant format it or use it as a harddrive, its just there.
'Just there' where? Is the drive actually partitioned and formatted?
See: https://forum-en.msi.com/faq/article/how-to-add-a-second-hard-drive-for-storage

Keyboard & Trackpad only work before booting, USB devices also not working

Hi,
Yesterday I installed MacFuse and NTFS-3G because I needed to store some things on an external drive for work. I rebooted as was instructed in the install docs and that's when things got ugly.
When on the login screen I've got no keyboard or mouse. Hooking up an external keyboard and mouse didn't work either, they didn't seem to be powered from the USB ports.
Odd thing is: I can boot to safe mode or single user mode, but after letting it boot I lose keyboard again.
Things I've tried:
- Safe mode: keyb not working at logon screen
- Single user mode: keyb not working at prompt
- Zapping PRAM: Can zap PRAM, but keyb not working at logon screen
- Resetting SMC: keyb not working at logon screen
So at first I thought this was a hardware issue (since USB devices don't get power), but since the keys work when booting up I start to wonder if it's just a software issue.
Any thoughts on this?
EDIT: I now hooked on a mouse befor being at the login screen and it seems to get power right up until the apple logo appears (until OSX is booting I presume?). So definitely a software issue? I'll try the setup disc this evening, but I don't want to lose any data. What's the best way to do that?
Thanks in advance, by the way!
Message was edited by: Kiff

Hi,
Same problem here after a reboot on evening of the 12th, i can boot into hardware test and no problems found, trackpad, keyboard and external USB working ok but when I boot normally, none of the above work.
I'm fairly new to MacOS but could boot as an firewire drive OK to get files off the machine?
Anyone have any starting points re drivers or prefers, I've done the PRAM, SMC reset etc, with no difference.
Thanks
Carlo

Is there a way to make Time Capsule back-up its contents to an external hdd connected to it's usb port.

     I wanted to know if there is anyway i could automatically backup my time capsule to an external drive connected to it's usb port. I tried using automator to make it copy newly added files into the external but it didn't seem to work as i had hoped and i wanted to know if anyone had any experiences in using other programs to copy the contents of one folder in the TC to another folder in a drive externally connected to the TC and also keep the contents of both folders up to date.
    In short, I am basically trying to make a "raid 1" and i know that TCs dont support raid natively so thats why i asked if anyone knows of a program that could do it from the mac side.
                                                                                                     Thanks.

Carbon copy cloner might work.. expect it to be very slow.. especially if you are using wireless.
There will be various rsync shareware available.. but like your experience getting it to actually work is loads of fun.. or NOT.

Urgent! External Displays not working due to "USB Devices Disabled"

I use a Matrox DualHead2Go ME for two external displays. Suddenly, I got a message: "USB Devices Disabled... Unplug the device using too much power to re-enable device." Though the DualHead2Go (DH2G) works, it stops functioning seconds later. I tried resetting PRAM and SMC. The ports are fine as I can use them for other devices. If I unplug the DH2G and re-plug, my external monitors work for a few seconds, then the DH2G shuts off per internal light winking out.
I don't think this is a problem w/my DH2G so much as my macbook pro early 2011. I don't know if there is a connection, but this all seemed have happened suddenly when I fidgeted with iTunes and my iPhone 4S. I really need my external monitors for work. HELP!
I also run a lot of programs, but I've been doing this forever and I've never had problems w/my two externals usingDH2G for some time now. I have 16gigs, external HD, 500gig HD. Thank you to anyone who can help. Figures Matrox is closed on the weekends.

It's working. I have no idea why, but I'm not complaining.
Thanks,
John

USB 3.0 External HDD only works on 1 USB port, rMBP 13

Similar Messages

Maybe you are looking for