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Ticket Resolution Summary Owner Reporter
#18572 worksforme Linux guest can't create links in rw-shared folder -> resolved by reporter stroypark
Description

Host: MacOS 10.14.4 (latest ATM) VBox 6.0.6 Guest: Ubuntu 18.04 (w/latest updates) VBox guest additions 6.0.6

host> create rw-share named my

guest> ...install guest additions from CD... (compile, install, reboot) guest> sudo mkdir -p /mnt/sf guest> sudo mount -t vboxsf -o rw,uid=$UID,gid=$(id -g) my /mnt/sf guest> cd /mnt/sf guest> ls foo bar guest> touch baz guest> ls foo bar baz # so one can create file and file system doesn't looks like read-only guest> ln -s baz z ln: failed to create symbolic link 'r': Read-only file system # :-[]

#9522 obsolete BSOD - after enabling virtualization and VT-d in BIOS Stian Indal Haugseth
Description

My guest OS was very slow so I tried to enable virtualization and VT-D in BIOS. After booting the guest OS and starting some heavy Java-apps i get a blue screen. This happens every time.

It seems the BSOD happens less frequently if I give the guest less RAM (e.g. 1GB)

I have a colleague who experiences the exact same problem.

Host: Lenovo T410s 3GB RAM Windows XP SP3 32b it

Guest: 4 CPU 1400MB RAM CentOS 6.0 32 bit Running Oracle OSB + Eclipse (requires much RAM)

#11115 fixed Shared Folders under Windows does not accept writes of more than 16MiB length stresstester
Description

When performing a write to a file managed by VirtualBox Shared Folders and the write's length is greater than 16777216 bytes, then this file write fails, while it should succeed.

How to reproduce

  1. Use Windows 7 64-bit as guest. Use Linux 64-bit as host. (Probably the problem happens for other Windows versions as guest and for any host.)
  2. Install Ruby (e.g. from http://rubyforge.org/frs/download.php/76527/rubyinstaller-1.9.3-p286.exe)
  3. Map a writable share to a driver letter.
  4. Open a "cmd" console and cd into a directory in this drive.
  5. Run this ruby script (e.g. called "test_virtualbox_shared_folders_write_size.rb"):
    #!/usr/bin/ruby
    
    [16*1024*1024,16*1024*1024+1].each do |size|
    	filename	= "test#{size}"
    	content		= "S"*size
    	puts "Writing #{size} bytes to file #{filename}..."
    	File.binwrite(filename,content)
    	puts "Done."
    end
    
    

Expected result

This output should appear:

>ruby test_virtualbox_shared_folders_write_size.rb
Writing 16777216 bytes to file test16777216...
Done.
Writing 16777217 bytes to file test16777217...
Done.

Actual result

This output actually does appear:

>ruby test_virtualbox_shared_folders_write_size.rb
Writing 16777216 bytes to file test16777216...
Done.
Writing 16777217 bytes to file test16777217...
test_virtualbox_shared_folders_write_size.rb:7:in `binwrite': Invalid argument - test16777217 (Errno::EINVAL)
        from test_virtualbox_shared_folders_write_size.rb:7:in `block in <main>'
        from test_virtualbox_shared_folders_write_size.rb:3:in `each'
        from test_virtualbox_shared_folders_write_size.rb:3:in `<main>'

Additional observations

Note that this problem is not limited to Ruby. Visual Studio 2010 suffers the same problem when writing large files. The error message is different, though, and looks like:

error C1085: Cannot write precompiled header file: 'FooBar.pch': The parameter is incorrect.
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