Questions tagged [usb-2]

USB 2.0 (Hi-Speed) is a USB specification that can transmit data at up to 480 Mbit/s.

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74
votes
5answers
257k views

Verifying USB connection speed (USB 3 or USB 2?)

I've purchased several new USB 3 capable drives to use with my new (USB 3 capable) laptop. They connect ok but I suspect they're silently falling back to USB 2. The sustained transfer rates I'm seeing ...
66
votes
4answers
481k views

Speed comparison between USB 2.0, USB 3.0, eSATA, Firewire and Thunderbolt

Which external connection has the highest data throughput with respect to the headers used? I would appreciate a slowest to fastest list including USB 2.0, USB 3.0, FireWire 400, FireWire 800, eSATA ...
38
votes
5answers
136k views

Does a USB hub affect performance?

I have two devices I want maximum throughput and latency with (MIDI drums and MIDI keyboard for example.) Would connecting both to the same USB port via a hub effectively limit the maximum data ...
26
votes
1answer
83k views

Why Do Some USB Cables Have Two USB Connectors at the End?

I've recently bought an external hard drive enclosure and it had arrived with an USB cable, with one USB connector on one side and two on the other. Why do some USB cables have two connectors while ...
25
votes
3answers
10k views

Is it safe to use a micro-USB 2 cable in a USB 3 portable hard drive?

The micro-B USB 3 port seems to be somewhat backwards compatible with the old micro-USB 2 standard. I was able to charge a phone that had the micro-B USB 3 port with a micro-USB 2 cable. However, I ...
16
votes
1answer
4k views

Why is there a speed increase when using a USB 2.0 device with a USB 3.0 port?

I know this question, or similar questions, have been asked before, but still I am curious… My laptop has two USB 3.0 ports and—on occasion—I will plug in a Western Digital external hard drive which ...
14
votes
2answers
3k views

Is a USB 3 Type A-to-A cable dangerous with USB 2 ports?

I recently purchased a USB 3.0 hub, and was surprised when I opened the box to find that it used an A-to-A cable for it’s main connection; see picture below. A “Type A” connector is the rectangular ...
11
votes
5answers
12k 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 ...
10
votes
1answer
605 views

Device is no longer USB 2.0?

I have a 32 GB pen drive that I have turned into my PC repair kit. I have formatted it to be a boot-able drive with multiple .iso's for different options. Recently however whenever I plug in the ...
8
votes
4answers
120k views

USB 2.0 and USB 3.0, how can you tell the difference?

I know the speeds would obviously be a key factor, but is there any spot on way to tell if a device is USB 2.0 or 3.0 such as a USB flash drive?
7
votes
5answers
68k views

Force a single USB 3.0 port to work as USB 2.0

I have several Dell XPS 13 machines that exhibit intermittent failures of the left USB 3.0 port, as described in this thread. I have lost data to silent corruption/disconnections on several external ...
7
votes
5answers
19k views

Extend USB 3.0 cable

I have a couple of new USB 3.0 devices which connect to my USB 3.0 ports via the new "Blue" USB 3.0 cables that end in what looks like a USB 2.0 Type A connector. Indeed, the USB 3.0 devices will ...
7
votes
3answers
2k views

USB 3 hub can also host USB 2 devices

I understand that when I use a USB 2.0 devices on USB 3.0 ports, that I'm really just using a USB 2.0 bus along side the USB 3.0 bus. What I really need is a true USB 3.0 device that can act as a USB ...
7
votes
3answers
88k views

Extremely slow USB transfer speed

I am using Windows 7 32-bit, and have a Transcend 8 GB USB 2.0 flash drive. I have formatted the drive to NTFS using the Windows format tool. The problem is that when moving or copying files to and ...
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 ...
6
votes
1answer
4k views

How to limit the USB bandwidth a device can allocate on Linux

How do you put an cap on the amount of bandwidth a USB device can allocate on Linux? I have a couple of cheap USB webcams that I'm trying to running simeltaneously. Running v4l2-ctl --list-formats-...
6
votes
1answer
736 views

Can a case with front USB ports be connected and used as a USB 3.0 port

I found this when I typed in my question. It sort of answers my question but I want to double check. Will cases with front USB port support USB 3.0? I have a Rosewill Challenger case purchased in ...
5
votes
3answers
8k views

Does the device that supports USB 3.0 work via computer that supports USB 2.0

I am planning to buy external hard drive that supports USB 3.0. Will it work with my old notebook that has USB 2.0?
5
votes
5answers
24k views

How long (maximum length) can USB 2.0 signal travel using hubs?

I know that the maximum distance USB 2.0 cable can be is 5mtrs. I'm not sure of the implementation using hubs and the length it can reach. Are there alternate methods of increasing the signal to ...
5
votes
3answers
133 views

Backup USB connection for Test Cell - USB splitter design?

This is a question for a project I am working on involving an unusual use of some USB equipment. Please see the diagram. Our existing setup consists solely of a single link between the device and the ...
4
votes
1answer
337 views

USB device only connects via hub

When I connect a USB 2.0 Lumidigm fingerprint sensor to any of a PC's USB 2.0 ports, both Windows and Linux won't detect it. It doesn't try to install any drivers, and doesn't detect a hardware change....
4
votes
2answers
17k views

Is there any advantage to USB 3.0 on an external DVD writer?

Given that many external DVD writers max out at 8x for read and write, and that even a 16x would require a throughput of at most 22 MB/s (which is below the low end of observed throughput for USB 2.0, ...
3
votes
4answers
71k views

USB 3.0 ports backwards compatibility problems with 2.0 devices?

I see some info on the net that suggest that I should be able to get my USB 2.0 devices to work in 3.0 ports. I only have two 2.0 ports on my new computer, and six 3.0 ports. I have installed drives....
3
votes
3answers
35k views

What downsides are there to running an OS off of a flash drive instead of a hard drive (USB 3.0 and 2.0) [duplicate]

Possible Duplicate: How does a hard drive compare to Flash memory working as a hard drive in terms of speed? I recently purchased a 16GB USB 3.0 flash drive, and I'm considering using it as a ...
3
votes
1answer
230 views

How am I exceeding USB 2.0 speeds on a USB 2.0 port?

I am writing files to a USB 2.0 drive from a RAM disk, that has a 256MB random filled file on it (created from /dev/urandom to stop the file being compressed too much). When I look at the speeds of ...
3
votes
0answers
181 views

Will a USB 2.0 LAN Adapter work with interrupts instead of polling if i plug it on a USB 3.0 port?

I have a LAN Adapter (HORI LAN Adapter for Nintendo Switch) that has the ASIX AX88179 USB 3.0 chipset, but it's USB 2.0. (I checked the cable plug and it doesn't have the USB 3.0's extra pins, also ...
3
votes
0answers
733 views

USB2 device incompatibility with USB3 computer

I have a new laptop with 2 USB2 ports and 2 USB3 ports. I have to use an USB2 RGB-D camera, namely the Softkinetic DS325. On my old laptop (only USB2 ports) everything is running as it should. On the ...
2
votes
4answers
6k views

Is USB 3 backward compatiable? [duplicate]

If USB 3 is backwards compatible, why do they place USB 2 ports with USB 3 ports on motherboards? Also, do USB3 External drives not work with USB2 ports?
2
votes
2answers
4k views

Are all USB-2 devices compatible with USB-3 port?

On my Gigabyte 880GM-USB-3 motherboard there are 2 USB-3 ports. Drivers are installed successfully in Windows 7 OS. USB-3 ports are working properly when any USB-3 devices are plugged in e.g. USB-3 ...
2
votes
3answers
237 views

Is there such a thing as a type C USB 2.0 connection?

I came across a tablet yesterday, which advertised a type-C USB micro port, but never mentioned USB 3.0 or USB 3.1. Later, I searched more and the reviews actually said it was a USB 2.0. Is there any ...
2
votes
2answers
3k views

Is there any advantage to using a USB 3 hub with USB 2 storage devices?

I have a host of USB 2.0 external HDDs that I'd like to plug into a single hub. Usually I don't actually access more than one at once, but you never know. Basically, I'm not sure how USB hubs work ...
2
votes
1answer
22k views

How to find which USB port is 2.0 or 1.1

This USB device could perform faster. The above message comes many time I connect my USB device to any port. I've more than one USB port, but don't know which ones are 2.0 and which ones are 1.1. Is ...
2
votes
3answers
3k views

RAID0 array of USB 2 disks, both connected to a single hub. Any benefit?

I have two unused USB 2 drives. I wanted to stripe them in a RAID0 configuration for fast disk access for virtual machines. (I find running a VMware virtual machine off a USB2 drive to be painfully ...
2
votes
3answers
1k views

How to get more full speed USB 2.0 ports on a modern laptop?

Modern laptops just have a few USB ports and to extend thoose you are supposed to use a USB hub. My issue is that I need to connect 4 highspeed USB 2.0 cameras to my laptop and while still keeping two ...
2
votes
3answers
4k views

MIDI Over USB-Hub: Latency?

I am connecting an NI Maschine (hardware) over USB to my Macbook Pro. Right now I'm using a USB 2.0 powered hub (by DLink or Belkin, depending). It seems fine, but these things can be hard to detect. ...
2
votes
1answer
553 views

Is a 2-Port USB 2.0 Hub faster than a 7-Port USB 2.0 Hub

I have a computer with about 6 external hard drives connected, however it's died and i'm replacing it with another computer with only 4 USB 2.0 ports. I have a 7 Port USB 2.0 Hub that is connected to ...
2
votes
1answer
382 views

Maximizing speed of USB 2.0 clients on USB 3.0 hub

I need to connect 2 USB 2.0 cameras and one USB 3.0 SSD to a single USB 3.0 hub. I would like both of the cameras to run at 480 Mbps and the SSD to use the rest of the bandwidth. Is this possible? I ...
2
votes
2answers
3k views

USB 2.0 device in USB 3.0 Port

If I plug in an USB 2.0 device (e.g. mouse, keyboard) into a USB 3.0 port, will the controller still use polling to acquire input data (e.g. keypresses/movements) from the device?
2
votes
1answer
2k views

How to enable USB 2.0 in Virtualbox 4.0.10, option for enabling EHCI is missing

I'm using Virtualbox 4.0.10 under Debian stable with Oracle VM VirtualBox Extension Pack 4.0.18r82821 to host an MS-Windows XP virtual machine for embedded software development. Unfortunately the VM ...
2
votes
0answers
4k views

How to determine USB OTG mode on Linux

I have got an i.MX6 device, which has a USB OTG port. Is there a way in Linux to find out whether that USB OTG port is currently in host mode or in peripheral mode? I tried dmesg | grep -i otg and ...
2
votes
0answers
284 views

USB hub advertised as 2.0 actually works as 1.1 [closed]

I bought this USB hub http://www.ebay.com/itm/281298880612 which is supposed to be a USB 2.0 hub. When I plug a pendrive in to the hub, Windows gives the message "This device can perform faster if you ...
2
votes
0answers
407 views

Installing USB Mouse on NF61S Micro AM2 SE?

I am using Windows XP sp3 and Windows 7 on NF61S Micro AM2 SE motherboard with AMD Athlon 64 X2 Dual Core 4400+, 2.31Ghz, 1.93RAM link for motherboard site; http://www.biostar.com.tw/app/en/mb/...
2
votes
1answer
465 views

Plug Computer Case USB 2 socket into mobo USB 3

I've got an Antec Fusion Remote Black Media PC case at home. The case needs two internal 9 pin USB headers to be fully functional - one for the USB ports on the front, and one for the LCD display. I'...
2
votes
2answers
685 views

multiple USB 2.0 devices faster on USB 3.0? [duplicate]

Possible Duplicate: Using USB 3.0 to speed up transfer between USB 2.0 devices? I know USB 2.0 maxes out at 480Mbps, and USB 3.0 maxes out at 4800Mbps. Can multiple USB 2.0 devices tap into that ...
1
vote
2answers
499 views

Gigabit Adapter on USB 2.0

I have a USB ethernet adapter on a netbook (Aspire One D250) that I use as a smb server to share files on my LAN. The adapter is 10/100 only, if I buy a 10/100/1000 adapter and use it on USB 2.0, will ...
1
vote
2answers
9k views

Why does Device Manager show “Intel(R) USB 3.0 eXtensible Host Controller - 0100 (Microsoft)” when I have only USB 2.0 ports?

My laptop's model number is an ASUS X205TA-SATM0404G. It has 2 USB 2.0 ports, which I have verified by looking up the specs online and also via the software and techniques mentioned here: How to ...
1
vote
2answers
6k views

Is it possible to connect one USB device to two systems at the same time and have the device be available for use on both systems without switching? [duplicate]

I've got a WiiU/Swtich GameCube USB adapter that I'd like to plug into my computer (device 1) as well as my Nintendo Switch (device 2) and have both devices recognize that USB adapter and the ...
1
vote
2answers
2k views

Convert USB 2.0 signal to true USB 3.0

I have a laptop which has one USB 2.0 host controller and one USB 3.0 host controller. I have many USB 2.0 devices connected (both to USB 2.0 and 3.0 ports) and I am experiencing bandwidth issues. So ...
1
vote
2answers
85 views

What stats should I look out for when buying a fast USB drive? [closed]

What facts and figures should I look for speediest copying of single large ISO or multimedia files (700Mb to 4.5Gb)? Also, if a flash drive is the fastest USB-3 compatible device, can I assume it ...
1
vote
2answers
430 views

Performance of Windows 8 on USB 2.0 SSD

Has anyone here tried installing Windows 8 to an external USB SSD drive and booting drive from a USB 2.0 port? I also want to install Visual Studio 2012 kind of IDEs and programming related software ...