delete-all-orphaned-disk-in-bosh.sh

# This command deletes all orphaned disks in a BOSH director (see: bosh.io; cloudfoundry.org)
# It assumes that the BOSH CLI is installed and that a BOSH director is targeded and the CLI is authenticated
for disk in `bosh disks --orphaned | grep 'disk-' | cut -d ' ' -f 2`; do;  bosh delete disk $disk; done

no semicolon after the do :)

This one requires jq, but is compatible with the BOSH CLI v2:

for disk in  `bosh disks --orphaned --json | jq -r '.Tables[].Rows[] .disk_cid'`; do bosh -n delete-disk $disk; done