|Article Number: 499221||Article Version: 6||Article Type: Break Fix|
XtremIO Family,XtremIO HW Gen2 400GB,XtremIO HW Gen2 400GB Encrypt Capbl,XtremIO HW Gen2 400GB Encrypt Disable,XtremIO HW Gen2 400GB Exp Encrypt Disable,XtremIO HW Gen2 400GB Expandable,XtremIO HW Gen2 800GB Encrypt Capbl
The unmap command (space reclamation) does not work/reclaim any space from the XtremIO when there is a VPLEX in between them.
There are few possible reasons for the issue:
1. VPLEX version does not support reclamation
2. Volume settings do not allow reclamation
3. Host may not have re-scanned volumes after VPLEX configuration changes
Verify if the environment allows reclaiming by checking the following criteria:
If unsupported, check the volume settings and make sure the volume you are trying to reclaim space from is “thin capable true” and “thin enabled enabled”. This can be verified from the VPLEX CLI by issuing the following command:
VPlexcli:/> ls -t /clusters/*/virtual-volumes/<Vplex volume name goes here>::thin-capable/clusters/cluster-2/virtual-volumes/Local_DD_Leg1_1_vol: Name Value ------------ ----------- thin-capable trueVPlexcli:/> ls -t /clusters/*/virtual-volumes/<Vplex volume name goes here>::thin-enabled/clusters/cluster-2/virtual-volumes/Local_DD_Leg1_1_vol: Name Value ------------ ----------- thin-enabled disabled
This can be also verified from the GUI interface. Access the link below for an article and video instructions:
If disabled, change the volume setting to enabled by issuing the following command:
VPlexcli:/clusters/*/virtual-volumes/<Volume name> set thin-enabled trueVPlexcli:/> ls -t /clusters/*/virtual-volumes/<Volume name>::thin-enabled/clusters/cluster-2/virtual-volumes/Local_DD_Leg1_1_vol: Name Value ------------ ----------- thin-enabled enabled
After changing the settings to thin enabled enabled, the volume(s) must be rescanned by the ESX host. It may take a few minutes before the re-scan is complete.
If you are still experiencing errors, a manual reclamation may be executed. Check the XtremIO Host and Configuration Guide for more information about that.
The following article contains a video on how to use space reclamation when an XtremIO array is behind a VPlex. It also shows how to check volume settings from the VPlex GUI interface.
Here are VMware KB's about space reclamation:
Here is an EMC KB about space reclamation: