trying to add extra disk to a swift deployment.

i have the following.. single all.

original swit-ring-builder swift-ring-builder object.builder add r1z1-127.0.0.1:6010/sdb1 1000 (enter size–ie 1tb=1000) swift-ring-builder container.builder add r1z1-127.0.0.1:6011/sdb1 1000 swift-ring-builder account.builder add r1z1-127.0.0.1:6012/sdb1 1000

adding disk swift-ring-builder object.builder add r1z1-127.0.0.1:6010/sdc1 1000 (enter size–ie 1tb=1000) swift-ring-builder container.builder add r1z1-127.0.0.1:6011/sdc1 1000 swift-ring-builder account.builder add r1z1-127.0.0.1:6012/sdc1 1000

then when i run ring rebalance on each i get.

no partitions could be reassigned either none neeed to be or none can be due to min_part_hours[1]

any advice or direction to document to re read would be appreciated.. thanks