The NAS offers two USB 2.0 and one eSATA port to connect external disks. It supports different file-systems (FAT32, EXT2, EXT3 and NTFS) but can access the first partition only. Therefore the connected disk is referred to as USBDISK or ESATA. The access rights are full and you can’t restrict them. If accessed via LAN, an NTFS disk connected to the NAS’s eSATA port is going to be no faster than 10-15 MB/s.
You can also connect an UPS to the USB ports (the compatibility list only includes products from APC). USB hubs are not supported, so you can only have two USB devices connected to the NAS simultaneously. There are no special options for turning external disks off safely.
There are a few pages for monitoring. For example, Resource Monitor shows you the current usage of the disk, processor, memory and LAN resources in real time. It also reports the temperature of the system and the speed of the cooling fan. It doesn’t tell you the temperature of the HDDs, though, whereas S.M.A.R.T. support is limited to a single status string. Hopefully, the NAS keeps track of HDD parameters and can report to the administrator in case of problems.
The second status page tells you the firmware version, LAN speed and MAC address. The third page repeats the system temperature and fan speed data and also shows the voltage on the 5, 12 and 3.3-volt lines. I guess all this info should have been provided on a single page, which would be more convenient.
The NAS has an integrated clock for keeping the internal log and other features. The clock can be synced automatically over the internet.
The log file isn't very detailed. It stores information about important events such as turning on/off or creating disk volumes. The Javelin S4 can send email notifications to any number of addresses about problems in its operation. It supports password-based SMTP authentication. There are no event filters here.
The hardware settings are limited to switching the sound alarm off and choosing the time period for the LED indicators to work. The latter setting can be handy since the LEDs may turn out to be too bright.
Besides the abovementioned WoL feature and UPS support, the power management options allow you to turn the disks off when inactive, specify an operation schedule for the NAS, and reboot or turn it off via the web-interface.
To update the NAS's firmware, you download the new version to your PC and then load it into the NAS. There are no configuration management options. You can't even reset all settings to their defaults.