Six hot-swappable 3.5-inch SATA drive bays - Supports up to 18TB with 3TB drives Two Gigabit Ethernet Ports Five USB 2.0 Ports - UPS, printer and external storage support RAID Support: 0, 1, 5, 6, 10, 30, 50, JBOD or Standard mode RAID Migration Predictive Data Migration Online Capacity Expansion Virtual Disk Drive (VDD) Expansion iSCSI (up to 32 iSCSI targets) DDNS Snapshots (up to 32 Snapshots supported) SNMP CIFS/SMB/Samba NFS AFP FTP/FTP over SSL WebDAV Link Aggregation Jumbo Frame Support HTTP/HTTPS NTP ADS Support LDAP Support Web File Manager E-mail Alerts Scheduled Downloads from Web or FTP Sites Telnet LLTD IPv4/IPv6 LUN Mapping & LUN Masking DHCP (Server/Client) S.M.A.R.T. Hard Disk Diagnostics Amazon S3 Cloud Storage Synchronization VMware Ready CHAP Authentication AES 256-bit Encrypted Volumes System Firewall IP Blocking Connection Monitor SSH Remote Backup Local Backup Backup Software Included Cloud Storage Backup One Touch External Backup Apple Time Machine Support Power Management to Conserve Energy and Extend Hard Drive Life MAID 2.0 Technology