Buffalo Technology TeraStation III review
I'm sure it's probably a security "feature", but I didn't like that you could not leave the door unlocked and remove the key. You also can't see the drive LEDs without opening the door, which is disappointing if you like to watch drive activity lights flashing away. Don't get too excited about the Diagnostic Port behind the front door. The serial port appears to provide a Linux console output. But it didn't respond to the keyboard input from the terminal emulator that I used to check it out.
The Power Mode switch caused a bit of confusion because it came set to Auto and I don't use Buffalo's NAS Navigator utility. It took a few unrequested shutdowns for me to remember to flip it to Manual, which kept it up and running until I shut it down by press-and-holding the front panel Power button.
Even if you don't use the NAS Navigator, you can set three sleep / wake schedules for power management. The Function button up next to the LCD display initiates a RAID rebuild after hot-swapping a drive, dismounts USB drives and starts a copy from a USB drive. The Display button cycles you through the various status displays that include Link Status for both Gigabit Ethernet ports, Drive status, IP address, RAID status, Date / Time and Firmware revision. I found it handy that the display will stay on the selected screen until you change it.
The Tera III draws 45 W when active and 12 W when sleeping. You'll hear the easily-replaceable fan when the NAS is booting, but it quiets down when boot time is over. Like the Pro XHL, the Tera III's fan stayed quiet, even when I ran the heavy-use iozone tests. The bulk of the III's noise is from the four drives, which ran very quietly and make the Tera III one of the quietest four-drive NASes that I have seen.
The slideshow has some good pictures of the III's insides, which are easily accessed by removing five screws and sliding the metal cover off. Given the III's target business audience, Buffalo has tried to make the power supply and fan—the highest failure rate parts after the drives—easily replaceable. The fan is mounted on a removable panel and has a standard mini power connector and the power supply sits right on top.
Figure 2: Inside right view
Getting the main board out so that I could take its picture required a bit more effort, including removing the rear panel. I also had to remove the heatsink (secured via an adhesive thermal pad) to find that the Tera III is the first NAS I have seen to use another new Marvell processor, an MV78100-A0 C080 Single-core ARMv5TE-compliant Feroceon clocked at 800 MHz.
Figure 3: TeraStation III main board
The processor is teamed with a SATA II controller that handles the four 3.5" WD WD5000AAKS Caviar Blue 500 GB drives that came in the 2 TB version sent for review. Like other Buffalo NASes, the drives are XFS-formatted.
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