What creates and uses \system volume information\$CBT2 files?

Web Dove 1 Reputation point
2020-08-24T04:18:37.453+00:00

Hi, I am unable to properly shrink my iscsi drive X: because the file "\system volume information\$CBT2" is marked D (unmovable). I would like to remove that file so I can shrink that volume which now has significant wasted space, but I don't know what it is for and what the side effects of removal might be. I am guessing that it is related to "changed block detection" given its presence on all of my disk volumes. However, I have never used on these disks either Macrium Reflect (which can create $MRCBT files) or any vmware (which I suspect also creates CBT files). So can anyone help me understand there purpose? Thanks Web Dove

![19655-shrink.png][1] ![19795-cbt-files.png][2] [1]: /api/attachments/19655-shrink.png?platform=QnA [2]: /api/attachments/19795-cbt-files.png?platform=QnA

Windows Server Storage
Windows Server Storage
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.Storage: The hardware and software system used to retain data for subsequent retrieval.
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  1. Xiaowei He 9,891 Reputation points
    2020-08-24T09:01:24.627+00:00

    Hi,

    Would you please provide a screenshot of right click the ISCSI drive in device manager, could shrink the disk? If not, what is the error message you get?

    I tested in my lab, it works to shrink the ISCSI disk.

    19875-shrink.png

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