Accepting 2×2.5-inch SATA 3.0 Gb/s hard drives and coming with mirroring RAID 1 function to backup and protect data on time , no worry about system failed caused by hard drive failure any more , also MR 2020 supports RAID 0 function which enhances read/write speed. Furthermore,it is embedded with RS232 port for hardware status monitoring purpose. Compact size with 5.25-inch CD-ROM bay, internal RAID device MR2020 perfect fits in server, IPC and workstation.