The N7700 was tested with our standard NAS test process with 2.01.08 firmware and seven Hitachi HDP72505 500 GB drives. Tests were run with 1000 Mbps and 1000 Mbps w/ 4K jumbo frame LAN connections with only four drives configured in RAID 0, 5 and 10 modes.
To see if the # of drives made a difference I ran tests with all seven drives configured in RAID 0 and only four drives in the array. The results (write plot here, read plot here) indicated that you can get some significant write performance gain by adding more drives, but not for read. Of course, with that many drives in RAID 0, you must like to live dangerously!
I first checked backup performance. The test copies a 4.35 GB ripped DVD test folder that I use in the NAS Chart Vista SP1 file copy tests from the NAS under test. Thecus does not support backup to either USB or eSATA attached drives and primarily supports backup only to other Thecus NASes that use its proprietary "nsync" protocol. But fortunately, Thecus also supports backup to any FTP server.
I initially tried to back up to my NETGEAR ReadyNAS NV+, but kept getting a connection failed message when I tested the connection. After some experimentation I figured out that the backup FTP target folder must require a user/password to access.
The nsync folder that the Thecus backup service requires also must not be the folder that you log into, i.e. the share name. The nsync folder should be a folder in the share, not the share itself, because the first thing that the Thecus backup service does after login is try to change to the nsync directory. Once I got that all sorted out, the backup ran fine, measuring 25.66 MB/s.
Figure 11 presents a summary of the write benchmark tests run for the N7700. There is some moderate cache boost for files up to around 512 MB. RAID 0 is the most stable after that, followed by RAID 10, with RAID 5 dropping off the most as file sizes increase.
Write performance with a 1000 Mbps LAN connection averaged over the 32 MB to 4 GB file sizes and with cached results above 125 MB/s removed from the average measured 72.8, 57.7 and 76.0 MB/s for RAID 0, 5 and 10 writes, respectively. These results rank the N7700 in the #2 and #1 positions in the RAID 5 Write and Read Charts.
Figure 11: Performance benchmark summary - write
Figure 12 shows the average read performance for the same test configurations which came in higher at 69.9, 64.5 and 67.3 MB/s for RAID 0, 5 and 10, respectively. Performance is evenly matched up to the 512 MB file size point. From there on, RAID 0 holds up the best, followed by RAID 10, then RAID 5.