Esxcli Storage Vmfs Unmap Status

Storage sectors of the size smaller than 1 mb are not reclaimed.

Esxcli storage vmfs unmap status.

Registered netapp customers get unlimited access to our dynamic knowledge base. Specify granularity for the unmap operation. Esxcli storage core device vaai status get d naa x x x x x. They have crawlers that will run unmap to the various datastores intermittently.

We want to make sure this says supported. The block size on a vmfs datastore defines the maximum file size and the amount of space the file occupies. Unmap granularity equals the block size which is 1 mb. Unsupported root esxi esxcli storage vmfs unmap l datastore name devices backing volume uuid do not support unmap.

Vmfs6 supports the block size of 1 mb. New authoritative content is published and updated each day by our team of. When deleting information from a vm the guest os transmits a vmfs signal in which it gives notice of newly available free space and then the signal is redirected to unmap. Esxcli storage vmfs unmap u 55dc0522 c72eebec 3780 d89d672d7a3c this process will take some time depending on the amount of storage that has to be reclaimed.

Esxcli storage vmfs unmap u 509a9f1f 4ffb6678 f1db 001ec9ab780e. Esxcli storage vmfs unmap l datastore00. They will issue it to the dead space and dead space only. If you would like to use the uuid run the following where 509a9f1f 4ffb6678 f1db 001ec9ab780e is your datastores uuid.

The other option we are also looking at here is the vaai status output. Select one of the. The way automatic unmap works is that all esxi 6 5 hosts that see the vmfs 6 datastore participate in the unmap process. The unmap command quickly frees up space in the vmfs data storage and then the blocks of space are also freed up along the chain.

Open a putty session to an esxi host and execute the esxcli storage vmfs unmap l datastore name i had to cut off the datastore name this command will take sometime to complete the operation and it depend on the size of the datastore. It will take some time but you should be able to refresh your san periodically to see the available disk space going up. And it will put some load on your storage so you might want to run this in a less productive time. I need to make sure the lun supports the vaai unmap commands to do this i type in.

It s really that simple. Esxcli storage core device list d naa x x x x x. Once one host has issued unmap to certain regions on a datastore no other host will then redundantly issue unmap to those locations.