Compactation taking too long?

Hello!

We have a 30T MSDP with 70% used, we expire a lot of images recently but the storage wouldn't go down, so the next logical step was to run de compactation via CRCONTROL, but it's taking too long? I started the proccess 2 days ago and it's still compacting, but the storage don't seems to respond to this.

What am I doing wrong? the logs seems fine (I think...) 

July 20 11:14:46 INFO [000000078C403640]: COMPACT: instance 0: release space 11837480 from container 4879606
July 20 11:14:59 INFO [000000078C403640]: COMPACT: instance 0: release space 13771159 from container 4879607
July 20 11:15:07 INFO [000000078C403640]: COMPACT: instance 0: release space 7164343 from container 4879609
July 20 11:15:23 INFO [000000078C403640]: COMPACT: instance 0: release space 4810206 from container 4879611
July 20 11:15:23 INFO [000000078C403640]: COMPACT: instance 0: release space 0 from container 4879612
July 20 11:15:23 INFO [000000078C403640]: COMPACT: instance 0: release space 0 from container 4879614

Please send help.