HPE Storage Users Group

Hi All,

I'm new to 3PAR and currently migrating data over from a number of Lefthand. All is going well except I notice that we're not really reclaiming space from the vluns presented to ESX5.5.

For example, I have a few 1.5TB vluns which were used in migration but now contain no data. VMware reports only a few hundred MB in use which is what I expect. The 3PAR still shows approx. 1100GB used. I have connected to one of my ESX hosts and ran the command below to unmap the datastore in 1GB chunks



The command takes approx. 3 minutes to execute. Using esxtop I can see the space being reclaimed. On the 3PAR I then run a compactcpg but only see anything between 10-30GB reclaimed.

Does anybody see the same issue? From what I understand the above should unmap all space.....

Having just run more unmaps and tracked the userdata size, it appears the amount reclaimed is always 32GB.

Any ideas?

I'm having the same problems here.
However I ran this command in vmware esxi and it seems I got great results.
Login via ssh to esxi host and:
- cd /vmfs/volumes/volume_name
- vmkfstools -y reclaim_percentage(this is the % of free space you want to reclaim. For example, if you have 1Tb free, and you execute "vmkfstools -y 50", you'll reclaim 500Gb.

Hope it helps

Regards,