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The 809 was tested with our standard NAS test processes. I upgraded to the latest 2.1.6 Build 0428T and used the Samsung HE103UJ 1 TB drives installed by QNAP. Tests were run with four drives configured in RAID 0 and 5 with a 1000 Mbps LAN connection.


I first checked backup performance with the results summarized in Table 1 along with the TS-509 Pro's for comparison. Best performance is surprisingly with the USB drive NTFS-formatted! You can check the 809's backup rankings for FAT and EXT3 formats, where it ranked fourth and sixth.

Product QNAP TS-809 Pro
Backup Throughput (MBytes/s)
QNAP TS-509 Pro
Backup Throughput (MBytes/s)
USB - FAT32 19.8 19.2
USB - EXT3 20.3 24.1
USB - NTFS 22.7 21.3
Table 1: Attached backup throughput test summary

I also tested Remote Replication for NAS-to-NAS backup to a TS-439 Pro. Table 2 summarizes the results for full backups of the test folder without and with the encryption option (SSH connection) enabled, which really slows things down.

Product QNAP TS-809 Pro
Backup Throughput to QNAP TS-439 Pro target
QNAP TS-439 Pro
Backup Throughput to QNAP TS-809 Pro target
NAS-NAS 31.89 33.07
(SSH encrypted)
10.24 11.16
Table 2: Networked backup throughput test summary


Figure 5 presents a summary of the benchmark tests run for the 809 with RAID 0 and 5 write and read plotted. Performance boost at the smaller file sizes isn't extreme for either RAID 0 or 5 writes and read performance is pretty flat across all file sizes tested. As with the TS-439 Pro, you don't give up a lot of speed by using RAID 5 vs. RAID 0.

Performance benchmark summary

Figure 5: Performance benchmark summary

RAID 0 and 5 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 is summarized in Table 3. The 809's lower ranking in the RAID 0 write test is due to the effects of removing cached performance from the calculations.

Product QNAP TS-809 Pro
Average Throughput
Chart Rank
RAID 0 Write 74.3 4
RAID 0 Read 84.5 1
RAID 5 Write 65.8 1
RAID 5 Read 80 1
Table 3: Average throughput summary

Performance - Competitive

Since the 809 stands alone as an eight bay NAS (at least among the products that I have tested), I'll have to compare it against six and one seven bay competitors: NETGEAR's ReadyNAS Pro, QNAP's TS-639 Pro and Thecus' N7700.

For RAID 5 write (Figure 6), the products clearly cluster in two groups, the higher-performing TS-809 Pro and Thcus N7700 and the (relatively) lower performing ReadyNAS Pro and TS-639 Pro. At the largest file sizes, there is around 20 MB/s separating the two groups!

Competitive RAID 5 write comparison  - 1000 Mbps LAN

Figure 6: Competitive RAID 5 write comparison - 1000 Mbps LAN

For RAID 5 read (Figure 7), the 809 actually comes out on top across all "large" file sizes. Note the big drop in the N7700's throughput above 512 MB.

Competitive RAID 5 read comparison  - 1000 Mbps LAN

Figure 7: Competitive RAID 5 read comparison - 1000 Mbps LAN

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