What’s the heck?
Look at the BootRacer history on my Windows 7 64-bit Ultimate.
It is incredibly slower 46.375 sec than normal 25-28 seconds.
I compared the slow boot with the previous one using the BootRevealer.
The problem began after starting the Session Manager:
I checked the most often used files.
Here I found the strange results:
Who needs the Hiberfil.sys? Surprise.
Detailed activity log:
Seems like the process reads the data from ‘hiberfil.sys’ and writes to ‘System Volume Information’. It is about 370 Mb read and the same written during normal Windows boot-up.
Who is need the ‘hiberfil.sys’?
I did not use hibernation at all.
The Windows system uses standard “balanced power plan” with sleeping after 30 minutes of inactivity. Hybrid sleeping is disabled.
Another strange thing:
The written file is deleted.
I explored the event log:
Event Source: VolSnap
Event Category: None
Event ID: 25
Volsnap driver is related to Microsoft Volume Shadow Copy Service.
Here is a great article about it:
I have no problem with free disk space on the drive: 450 Gb is free, 14.8 Gb is used.
Looks like the problem is in high load:
“Shadow copies are lost during backup and during times when there are high levels of input/output”.
Of course the Windows boot-up process is not good time for backup.
It is very strange for me, why the VSS did not wait for more comfortable time.
As a result I had the boot delay and lost all restore points.
Looks like there is no hotfix of the problem for Windows 7.
One positive thing:
I know what happened.
There is not any secret in the Windows boot-up process.
As workaround, I turned off ‘hiberfil.sys’, because I don’t use it, using the simple command:
powercfg -h off
Also, I know how to turn it on: powercfg -h on