Ticket #11149 (closed defect: duplicate)

Opened 5 years ago

Last modified 5 years ago

Constant disk read

Reported by: gaborca Owned by:
Priority: minor Component: other
Version: VirtualBox 4.2.4 Keywords: disk_read
Cc: Guest type: all
Host type: Windows


I have got a relatively old harddrive in my PC, and recently I noticed that it keeps constant disk reading (or writing) when I run particular programs, because it has got audible seek sounds. After investigating a bit (stopping all my software, and starting them one by one) it turned out that VirtualBox is making that noise.

To prove it, I downloaded and ran ProcMon from Microsoft (, chose Filter (ctrl+L), and added two rules: "Operation is ReadFile" and "Operation is WriteFile". VBoxSVC.exe and VirtualBox.exe make together about 300 disk reads in the ProcMon process reading refresh period (in 2 or 3 seconds). The weird thing is that both processes keep reading the same file, C:\Program Files\Oracle\VirtualBox\VBoxC.dll, about 100-200 bytes, and they start it over and over again. You can see that on the attached screenshot of ProcMon, and I also  upload that onto my website.

My host is: Windows XP SP3 This bug is present in 4.2.0 and also in 4.2.4 (the newest one) The bug is present in all guest I started (Windows XP, Debian, OpenBSD) The bug doesn't generate visible CPU load, but I fear it wears the disk


virtualbox_bug.png Download (48.1 KB) - added by gaborca 5 years ago.
Screenshot of Process Monitor showing VirtualBox constant disk reads

Change History

Changed 5 years ago by gaborca

Screenshot of Process Monitor showing VirtualBox constant disk reads

comment:1 Changed 5 years ago by frank

  • Status changed from new to closed
  • Resolution set to duplicate

Duplicate of #8298. Please continue the discussion there.

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