We observe following errors and symptoms:

1) Personal vDisk inventory process completes successfully. However, Personal vDisk Image update failing with error: "There is not enough free space in the Personal vDisk storage. Expand Personal vDisk storage to provide more space".



2) We observe below error in Citrix Studio:

Error code 18. There is not enough free space available on the personal vDisk drive when performing an image update operation. Expand personal vDisk storage or remove unused files to free space in the personal vDisk storage. The image update should restart after next reboot. 

3) We encounter the same error even after increasing the Personal vDisk size.
4) Resetting the Personal vDisk may help.

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This issue is resolved in LC9439. Please contact Citrix Support for the same.

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Problem Cause

This issue is usually seen while installing Service Packs, Cumulative Updates or Windows version update. These updates make changes to a large number of files in the windows OS. Personal vDisk tries to log each of these change and hence ends up creating a huge log file during the Image update process. It is this log file that brings the Available free space below Required free space. Now, at the time of Merging VHD, Personal vDisk does another check on the available space and compares it to required free space. Hence the image update fails due to shortage of Free Space.

Personal vDisk inventory process completes successfully. However, Personal vDisk Image update failing with error: "There is not enough free space in the Personal vDisk storage. Expand Personal vDisk storage to provide more space". We encounter the same error even after increasing the Personal vDisk size. Resetting the Personal vDisk may help.