Generally available: Multi-writer support for Hyperdisk Balanced High Availability disks

## Feature **Generally available**: Multi-writer support for Hyperdisk Balanced High Availability disks. You can give up to 8 VMs, across two zones, simultaneous read-write access to the same disk. For more information, see [Share disks between instances](https://cloud.google.com/compute/docs/disks/sharing-disks-between-vms).