4 bay nas nas enclosure max hard drives 4 hard drive location vertical target audience home users internal file system ext4 external file systems ext4 ext3 ext2 fat32 ntfs fat hfs raid levels jbod 0 1 5 networking gigabit 101001000 connections 2x usb 30 case tower processor marvell armada 388 clock speed 1 600 mhz ram 2 gb ram type ddr3 display status lcd optical disc drives without protocols dhcp ntp ddns apple bonjour rally upn