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Problem description
For Windows-based instances, the disk space of the C drive is decreasing.
Cause
The C drive keeps decreasing sometimes because the following files occupy too many disk space:
Tip: you can use tools such as WinDirStat or SpaceSniffer to analyze the disk directory size and confirm the cause of the problem.
- There are many Log files and Cab files whose names start with
C:\\ Windows \logs_cbsin the system disk directory. The CbsPersistent_20151211070234 filewhosemodified time is 2015/12/9 exists in c:\\ Windows \\_dashboards. This file is a log file that is recorded when the Windows patch was installed when the image was created. c:\windows\tempdisk directory constantly generate new cab_XXXX_X file takes up a lot of disk space.C:\\ Windows \temp contains a cab_XXXX_X file modified on 2015/12/11. This file is a temporary file generated when the file is packaged into a CBS file in Windows.
If the operating system created based on the image does not have sufficient memory and no virtual memory is configured, the image may fail to be packaged due to a lack of virtual memory. For more information, see how to solve the problem of insufficient virtual memory in Windows.
Solution
Create a snapshot of the system disk and data disk to avoid data loss.
- For more information about how to delete unnecessary temporary files, see official Microsoft documentation.
- Log on to the instance and delete the files manually.
References
When a Windows-based ECS instance is created by default, the size of the system disk is 40 GB. You can specify a larger space for the system disk at the time of purchase, or expand the system disk later.
Application scope
- ECS