I. Phenomena:

an X of the external storage disk array divides the volume into a 1.5T space for the windows host. The volume mode is thin and thin lun. The service host shows that 500g is available for 1.5T, the storage side view has exceeded 160%, the data has been written to 2.4T,

due to the problem of thin volumes, the host-side business has executed delete. The actual space is not set to zero, but marked. In other words, no explicit command is issued to allow storage to recycle space, the space on the host side is not released and always occupies a high proportion, resulting in a different proportion of the space on the host side and the storage side.

II. Requirements and solutions:

reclaim the space on the host and storage side, and convert the volume to thick backup.

Step 3:

①. Storage expansion, from 1.5T to 3T,

② host side, Computer Management-Disk scan-expand space

③. sdelete -z drive letter: for example, sdelete -z d:

wait until the storage side is recycled.

④. Storage side thickness provisioning conversion,
⑤. Verify the data after completion.

IV, download and use sdelete

①, website:

https://docs.microsoft.com/zh-cn/sysinternals/downloads/sdelete

-- Stop work--