USB stands for Universal Serial Bus and is a general and universal interface standard for connecting computers and electronic devices.

learn more… | top users | synonyms

7
votes
2answers
4k views

What exactly does the dd command do?

A few days ago I was delighted to find out that it's not all that difficult to write an iso image to a USB without the help of a third-party program explicitly designed to do so. But the command (or ...
7
votes
1answer
9k views

How to disable power to the mouse and keyboard after shutdown?

After my computer shuts down, I still have the power to the keyboard and mouse. This causes both the keyboard and mouse to have lights that remain lit while the system is off. How do I change this, so ...
7
votes
3answers
2k views

How to install Windows 8 from USB flash drive?

I downloaded Windows 8 as an ISO image, and I'd like to install it on a computer that doesn't have an optical drive. Is it possible to install Windows 8 from a USB drive? How would I do this?
7
votes
3answers
2k views

Is there any risk in a USB physical loopback?

If you connect a computer to itself using an USB cable (and 2 USB ports), are you likely to damage the device? It will recognize itself as an USB device?
7
votes
5answers
5k views

Would USB 3 make a difference for a USB 2 5400 RPM drive?

I've got a USB 2 5400 RPM external HD. I'm thinking of getting a new computer with USB 3 ports. If I'm currently getting read/write speeds from the external HD on USB 2 of roughly 30 mb/s (both read ...
7
votes
3answers
10k views

Is there a size limit on external USB hard drives?

The internal SATA hard drives have a limit on a lot of motherboards of 2TB and if I want to get a 3TB HDD then I need to connect it using a PCI card (or get a new motherboard). But I wanted to ask: ...
7
votes
9answers
20k views

What's the maximum size Windows 7 allows for ReadyBoost?

I read somewhere the Windows 7 had removed the limit on ReadyBoost from 4GB and now allows an unlimited number of GBs. I would like to reconfirm this as a fact. At present, my Windows 7 RC 7100 ...
7
votes
4answers
43k views

Partition table corrupted (USB flash drive)

It's an 8 GB Patriot thumb drive, which I've used extensively with lots of data. Today, it is detected, but all data is gone: (EDIT at least some data is still there, but the partition table is gone) ...
7
votes
2answers
27k views

Converting Firewire to USB 3 - is it theoretically possible?

I am in the process of buying a new laptop for video capture / editing, and it's proving difficult to find one at a decent price / spec that includes Expresscard for Firewire connectivity (which I ...
7
votes
4answers
19k views

iPhone tethering via USB not working

I can't get USB tethering to work. My setup: iMac with Mac OS 10.6.2 iPhone 3G, Sofware version 3.1.2 (Build 7D11) The phone shows up in iTunes and syncing works as it should. I went to System ...
7
votes
7answers
36k views

“Need to format the USB Flash drive” message… can the data be recovered

I have a USB flash drive, that when plugged into any machine (XP, Vista or Windows 7) the following message is displayed: Indeed looking at the drive in Disk Managment the file system is recognized ...
7
votes
4answers
36k views

USB Ports Not Working

None of the USB ports work anymore on my HP EliteBook 2540p laptop which is running Windows 7 Pro SP1. By "not working," I mean if I try plugging in a thumbdrive or external HDD it does nothing ...
7
votes
3answers
9k views

Script in udev rule doesn’t run

I'm running Ubuntu 9.10 (Karmic Koala) on a laptop and would like NumLock to automatically toggle depending on whether my USB keyboard is plugged in (numlock on) or unplugged (numlock off). To ...
7
votes
4answers
18k views

Bluetooth “Remove Failed” (Windows 8)

My Windows 8 machine does not recognize a device which is connected via BlueTooth across a USB port. Apps are reporting the presence of COM1 and COM2, no others. I disconnected and reconnected my USB ...
7
votes
2answers
1k views

How can I use target mode in Linux with USB?

Kernel 3.5 introduces: This release includes a driver for using an IEEE-1394 connection as a SCSI transport. This enables to expose SCSI devices to other nodes on the Firewire bus, for example ...
7
votes
1answer
14k views

Is there a way to make Windows 7 install .iso onto USB drive from OSX?

I copied my windows 7 cd to a ISO and trying to source the image onto my USB drive from OSX. So far it doesn't seem like it's possible with disk utility. Is there something else I can do to make this ...
7
votes
5answers
13k views

How to automount an Android phone as USB mass storage?

When connecting my Android device to a PC, it prompts to mount it as USB mass storage. Is there a way to force it to auto-mount?
7
votes
4answers
111k views

How to format/repair a write-protected USB drive with I/O errors?

I ordered a bunch of 1GB usb drives from a semi-shady Chinese company. Most of them work just fine, but a couple of them won't let me format them because they are "write-protected." There is no write ...
7
votes
2answers
2k views

MacBook Pro USB port provides more current in Mac OS X than in Windows

I have a MacBook Pro with both Mac OS X Lion and Windows (under BootCamp) installed. While in Windows, I tried to charge my iPad 3 via the USB port. The iPad says "Not charging", but really, it does, ...
7
votes
3answers
2k views

Laptop wakes up when I unplug/power off any usb devices

I am wondering if there is a way to change this functonality in windows - everytime an external usb device powers off or if I unplug it, my laptop wakes up from sleep, which is really annoying. This ...
7
votes
3answers
30k views

Can I turn my external USB HDD into a wireless HDD?

There's a new league of "wireless HDDs" available out there, For example: The Transcend Storejet Cloud and the Seagate Satellite My question is: is it possible to make use of a wireless USB adapter ...
7
votes
3answers
4k views

Disable unsafe USB removal warning on OS X

Is there any way to remove the warning message that pops up on Mac OS X when you remove a USB device without ejecting it properly first?
7
votes
1answer
2k views

Linux acting as USB device

I am working on an embedded Linux platform and I have need to transfer data between the platform and a PC. The embedded Linux has a usb device port (like a printer), so this is the means by which ...
7
votes
3answers
9k views

Ext2 or Ext4 for bootable USB Flash-drive with Linux?

I want to install Ubuntu to a USB Flash drive (so I have my Desktop everywhere and can customize it as I want). I'm still choosing what's the best filesystem for the USB; Ext2 with no journaling or ...
7
votes
5answers
9k views

Make a USB drive read only

I have a 1.5TB USB drive with many important files that I want to give to a friend (they have Windows7) for reading only purposes. thumbscrew appears to flip a registry switch but it seems to be on ...
7
votes
7answers
4k views

USB External HDD NOT spinning down on Windows Vista / Windows 7

I have 3 external 2.5" USB HDDs - all from different manufacturers and with different capacities. I also have access to multiple Windows Vista / Windows 7 / Windows XP computers. My problem is that ...
7
votes
1answer
3k views

What is and how to increase the maximum number of usb devices?

I'm wondering what is the maximum number of USB devices the Linux kernel can manage? Does this depend on the root-Hub or something else, too? Is there a way to increase this maximum number? I need ...
7
votes
2answers
4k views

How to know which USB port is 2.0?

My computer (running Windows XP) has 4 USB ports at the back. From the Device Manager window, I know that one of them is 2.0, and the rest are all 1.0. I have a webcam that I think will benefit from ...
7
votes
2answers
5k views

How can I login to Ubuntu using a USB serial port?

How can enable remote terminal login into Ubuntu 9.10 using a USB serial port? I created device /dev/ttyUSB0 and i want to allow logins using Hyper-Terminal. I found some resources but they are ...
7
votes
3answers
23k views

How to create an UEFI bootable USB stick from an ISO

I have an ISO image of my backup solution's recovery cd. When I burn the image to a CD-ROM, I can boot from it in UEFI or normal mode without problems. Unfortunately, this is no solution for my ...
7
votes
2answers
2k views

Fake USB connectivity for a virtual machine?

I am trying to install the network software for a HP printer inside a virtual machine that's running Windows XP Professional that has no USB connectivity - it doesn't even have USB drivers present. ...
7
votes
4answers
2k views

Multi-partition USB stick

In my freelance job as "the dude that fixes your computer" I have an extremely handy tool, a bootable USB stick with Ubuntu LiveCD that allows me to recover and investigate in a known, working ...
7
votes
2answers
4k views

How to restart audio without rebooting (USB soundcard) - the nasty case

I have a very similar problem to this: Is there a way to restart audio without restarting windows 7 computer? I've got a USB external sound card (Line6 UX1, the older one), the OS is Windows 7 x64. ...
7
votes
1answer
9k views

Detect and mount external usb drive - Linux (Debian)

I have a 3TB USB 3.0 External HDD (Seagate) that I would like my Debian machine to pick up on boot so that I can use rsync to backup to it using cron. If i unplug the drive and plug it back in then ...
7
votes
1answer
2k views

How to install OSX into VirtualBox on a Macbook Air using Apple's Reinstall USB

I'm currently dual-booting OSX and Ubuntu on my Macbook Air, but it'd be nice to run OSX within Ubuntu via VirtualBox. This seems possible using VirtualBox and is legal - there's even a post on an ...
7
votes
1answer
1k views

Windows 7 USB stick and (late 2010) Macbook Air

If you install Windows 7 into the Boot Camp partition from a USB drive, it will apparently become impossible to boot from that USB drive on that Mac again. I'm trying to find out why. This is the ...
7
votes
3answers
36k views

How to share an external USB drive over network in OS X?

I have an external USB drive mounted on my Mac OS X 10.6 "Snow Leopard" box. I want to share a folder on this volume to another OS X computer over LAN. How is it possbile? If I simply enable the ...
7
votes
1answer
3k views

Verizon USB551L 4G Stick on Linux

I have been trying to get a Verizon USB551L 4G USB Stick working on Debian Linux. I have been able to get it to connect, but it always disconnects after 10 secs to 2.5 minutes, then it cannot connect ...
6
votes
7answers
86k views

How to “restart/repair” an USB port?

My laptop has two USB ports, but one is broken, so I use a USB hub in the other good USB port. In that USB hub, I use a mouse and keyboard. Suddenly, that USB port doesn't detect the mouse and the ...
6
votes
3answers
4k views

Can I use my wireless keyboard receiver to connect to Internet via my Wi-Fi router?

I have a desktop computer with Windows 7 and I recently purchased a Logitech wireless keyboard that has an "Unifying" transceiver. Can I use it to get Internet on my desktop by connecting to my home ...
6
votes
2answers
2k views

What's up with this 64GB USB thumb drive appearing as two disks?

I recently purchased a 64gb usb thumb drive, but for some reason it appears as two disks on every system I've insert it in. I've tried to repartition it in Linux, Windows, and MacOS to no avail. ...
6
votes
4answers
3k views

How do I mount a USB in plain XMonad?

Now that I am using XMonad I find that my USB devices no longer automount when I plug them into my computer. How do I get them to automount again just like they did when I was using gnome?
6
votes
6answers
2k views

How to wipe a USB hard drive

I have a USB hard drive that I'm planning on donating. Before I donate it, however, I want to be sure that it has been completely and unrecoverably wiped of personal information. Darik's ...
6
votes
6answers
37k views

How to “burn” ISO/img/cue+bin to USB drive?

I don't get it. Why is it so complicated to create a bootable usb from a disc image? Disc images have boot sectors, so why can't you just write the raw LBA values from an image directly to a USB and ...
6
votes
1answer
800 views

Replace Front USB Ports in a 2003 Alienware Case [closed]

I have this old Alienware case from around 2003 in which I have replaced parts for years: I have never replaced the front USB ports, and I would like to get USB 3. Here are pictures of the USB ...
6
votes
4answers
15k views

Is there a distinct advantage that a PS2 port has over a serial/USB port?

Silly question perhaps ... I'm told that PS2 technology dates back to the early 1990's or thereabouts. By and large, motherboard manufacturers still support PS2 technology/ports instead of providing ...
6
votes
2answers
5k views

Remove the write protection from a USB flash disk

My flash disk encountered an error saying that it has been write protected, so of course I can't even copy files or even format my flash drive. What happened to my flash drive to cause this? And ...
6
votes
3answers
26k views

How can one create a bootable Linux USB key that works on Mac (Intel 64 bit CPU) hardware?

I'm trying to create a bootable USB key with Linux (debian) and that can be booted on Macintel hardware. I have read that MAC's EFI can only boot GPT GUID formatted disks. I'm desperately trying to ...
6
votes
4answers
4k views

Can I copy my operating-system on an USB-stick to use it in the go?

I'm tired of configuring my system and all applications for different computers (work, home, laptop, ...). Can I copy my system on an USB-stick and boot from it? What are the pitfalls in doing so and ...
6
votes
1answer
3k views

USB keyboard 'shuts down' when holding keys

When I do not create a keyboard event (i.e. pressing or releasing a key) for more than 5 seconds, the numlock and other LEDs on my keyboard go off. When I'm holding a key for more than 5 seconds and ...