Volume Expansion & Backup When running out of the hard drive capacity on DS2411+/DS3611xs, the DX1211 provides an easy way to immediately scale capacity by additional 12 hard drives. The RAID volume on DS2411+/DS3611xs can be expanded directly without having to reformat the existing hard drives, ensuring the Synology DiskStation continues its service during the capacity expansion. When created as an independent volume, the DX1211 provides an easy solution for backing up the Synology DiskStations. Reliable Plug-n-use Design The Synology DX1211 securely connects to the DS2411+/DS3611xs via an Infiniband cable to carry 12 Gb/s SATA signal for the maximum throughput. It allows the hard drives in the connected Synology DX1211 to operate as they are the internal ones of DS2411+/DS3611xs, with no lag in data retrieval. Green & Easy to Manage HDD hibernation or HDD Deep Sleep mode can be configured to take effect automatically when the system has been inactive for a specified period of time. This not only saves energy but also extends the lifespan of the hard disks. Synology DX1211 is managed by DSM, no additional software installation is required.