You can untag flash devices that are used as capacity devices, so that they are available for caching.


  1. To untag a flash device marked as capacity, run the esxcli vsan storage tag remove -d <device name> -t capacityFlash command. For example, the esxcli vsan storage tag remove -t capacityFlash -d mpx.vmhba1:C0:T4:L0 command, where mpx.vmhba1:C0:T4:L0 is the device name.
  2. Verify whether the flash device is untagged.
    1. In the output, identify whether the IsCapacityFlash attribute for the device is set to 0.

Command Output

You can run the vdq -q -d <device name> command to verify the IsCapacityFlash attribute. For example, running the vdq -q -d mpx.vmhba1:C0:T4:L0 command, returns the following output.

"Name"     : "mpx.vmhba1:C0:T4:L0",
"VSANUUID" : "",
"State"    : "Eligible for use by VSAN",
"ChecksumSupport": "0",
"Reason"   : "None",
"IsSSD"    : "1",
"IsCapacityFlash": "0",
"IsPDL"    : "0",