Fast Restart (FRS) supports writing to one single mount, which can be a single device or a RAID.

The mount should be used exclusively for the Terracotta server process. The software was designed for usage on local drives (SSD/Flash in particular) - SAN/NAS storage is not recommended. If you utilize SAN/NAS storage you will experience notably reduced and inconsistent performance - any support requests related to performance or stability on such deployments will require the user to reproduce the issue with local disks.

Fast Restartability is described in detail in the Developer Guide.