# Systems & storage

CARC clusters, storage spaces, quotas, and usage policies.

* [Systems overview](overview.md) - Current CARC clusters (Easley and Hopper), storage tiers, and web portals such as JupyterHub, Open OnDemand, and XDMoD.
* [Storage and compute usage policies](resource-limits.md) - Storage quotas, per-cluster partition and walltime limits, Slurm fairshare policy, and the job time-limit extension policy.
* [Storage and backups](storage.md) - CARC storage spaces (home, project, scratch), the real filesystem paths, retention windows, and what is backed up.
* [Storage permissions on BeeGFS](storage-permissions.md) - Manage file and directory permissions, including ACLs, on CARC BeeGFS scratch storage.
* [Cluster specifications (legacy reference)](cluster-specifications.md) - Historical hardware tables for CARC clusters, including retired systems such as Wheeler, Taos, Gibbs, and Xena. *(legacy)*