I've got a strange reproduceable phenomenon since a few weeks.
If i plug in a specific USB hard drive it is not recognized.regardless how many times i unplug and replug it.an error is even shown that a device can't be recognized.
BUT if i plug it in before i start the pc, then the drive is normally recognized with no problem.
For programs that use ports i could think of a specific port being already used.but as this is an USB device something like that shouldn't be possible as far as i'm aware.
So my question is here (generally not specific to this HD) :in such cases that an USB device can only be recognized if plugged in before starting the PC.what could be the reason for something like that?
Windows version : 10.0.171 34 build 17134
HD : Seagate Backup + Hub BK SCSI Disk Device
- I would saay USB 2 Driver :21.06.2006 v: 10.0.171 34.1
Answer 1 :
Many kinds of problems can arrive with USB devices, and there are many solutions.i have tried to compile below the solutions i know of in Windows 10.
- Run the USB troubleshooter of Windows.
- Since Windows 10 was an upgrade from Windows 8, deleting the USB Controllers devices in Device Manager and reboot will force the usage of Windows 10 drivers.see the next point.
Device manager may not show all the devices it knows about.to ensure seeing all of them, start it in a Command Prompt run as Administrator the following commands :
set DEVMGR_SHOW_DETAILS=1 set DEVMGR_SHOW_NONPRESENT_DEVICES=1 start devmgmt.msc
Use the free USB Oblivion to wipe out all traces of the USB drivers and reboot.
- Search for a driver for your USB Controller on the manufacturer's website.
- Try a different USB cable.
- Check for a BIOS update (carefully!).
- Try using a different USB port.if the computer has back and front ports, and some are working better, this can be a power supply problem where the ports are not getting enough power.some ports may have a shared feed from the power supply with too many USB devices on this one feed.
- In Device Manager, right-click the USB Controller, choose Properties, and in the Power Management tab uncheck allow the computer to turn off this device to save power and click OK.
- Disable fast startup.
- In Control Panel> Power Options> Change plan settings> Change advanced power settings> USB settings> USB selective suspend settings, disable both on battery and Plugged in settings.
- If you don't have USB3 devices, then disable USB3 support from BIOS.
- Disable your anti-virus if it is not Windows Defender.
- Update your chipset driver if you can find a later version.
- Reinstall Windows from scratch.
Before starting all this, ensure your backups are good and create a system restore point.
Answer 2 :
When you are connecting USB hard drive to a PC, it's recognized by the PC (before the OS) that's an hard drive.and the PC will treat it like any hard drive.that is permitting booting on for example.
Search for a setting in your BIOS that's not allowing hot plug of hard drive.that's may be the problem here.your operating system is certainly innocent.