How to convert Persistent Standard disk to SSD.
First create a snapshot of the disk.
gcloud compute disks snapshot your-server \ --snapshot-names manual-snapshot-disk-1 \ --project your-project \ --zone us-central1-c |
Restore snapshot to SSD format.
gcloud compute disks create disk-1-ssd \ --source-snapshot manual-snapshot-disk-1 \ --project your-project \ --zone us-central1-a \ --type pd-ssd \ --size 10GB |
Swap disks using GCP attach and detach.