Good day to all!

  • Work computer: AMD A8-5600K 3.60GHz processor, 12Gb 1600MHz RAM, Windows 7x64, 360 Total Security antivirus (virtual disk file added to trusted), Windows defender turned off.
  • Media: USB (3.1) Flash Kingston HyperX Savage HXS3 64GB
  • Virtual Machine: VirtualBox 5.1.2 r108956 (Extension Pack 5.1.2-10K956)
  • Virtual machine settings: 2 processors, 4096GB of RAM, 256MB of video memory, 2D and 3D video acceleration enabled, hardware virtualization enabled, SATA media controller (AHCI)
  • Target OS: Windows 7x64

Faced the following problem : I created a virtual VHD disk for running Windows 7 on removable media. The installation process takes about 30 minutes. After copying and unpacking the system to a flash drive, the speed drops to almost zero. Each action takes about five minutes! Working in such an environment is almost impossible. The media on the work computer is defined as “Removable Device”. HD Tune Pro shows the file reading speed of 300MB \ s, file writing - 200MB \ s.

Tell me, please, what could be the problem? On forums and in various articles they write that the speed of work even on USB 2.0 is tolerable.

  • Is your virtual disk dynamic or fixed? If dynamic, redo to fixed. - gbg
  • I understand you did something like windows 10 to go , but at 7? If so, how did you create a VHD? If using VB, then on the Internet it is advised to make Windows itself the means - there are differences. - don Rumata
  • VHD disk is fixed. Created by means of VirtualBox. - OVROfbuik10

1 answer 1

Thanks to all! Found a solution to the problem. It turned out to be sufficient to activate the flash drive caching on the working computer (Computer Management-> Disk Management-> Right-click on the disk in the bottom of the window-> Properties, the Policy tab, Enable Record Caching for this Device) and enable I / O caching in SATA virtual machine controller. Also I changed the file system on the media itself to exFat, but I think that this did not really affect the result.