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The 209s were tested with our standard test process. I used the latest DSM 2.2-0942 firmware in both products, which had two Samsung HD753LJ SpinPoint F1 750 GB drives installed by Synology. Tests were run with 1000 Mbps and 1000 Mbps with 4k jumbo LAN connections in RAID 0 and 1 modes. Both machines took around two hours to create and sync a RAID 1 array of two 750 GB drives.


I first checked backup performance to an Iomega UltraMax Pro Desktop Hard Drive configured in RAID 0 attached via both USB 2.0 and eSATA. 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 to the attached drive.

The results summarized in Table 1 show that the 209+II didn't always beat the 209 in backup speed when the test drive was attached via USB. But the 209+II did pretty well using an eSATA connection to an EXT3 formatted drive (the DS209 and 209+II's native format).

Product Synology DS209
Backup Throughput (MBytes/s)
Synology DS209+II
Backup Throughput (MBytes/s)
USB - FAT32 19.2 16.9
USB - EXT3 23.6 17.6
USB - NTFS 8.6 16.7
eSATA - FAT32 N/A 39.9
eSATA - EXT3 N/A 59.5
eSATA - NTFS N/A 17.9
Table 1: Attached backup throughput test summary

Note that I was able to test backup to the drive formatted in NTFS, since this feature was added in DSM 2.2. And the throughput is pretty good, too, compared to the usual 5 MB/s or so I get with either USB or eSATA.

I also tested NAS-to-NAS backup to the QNAP TS-239 Pro RAID 0 target that I have started to use as a standard rsync backup target. Both products turned in speeds comparable to what I've measured on much more powerful NASes and better than I got between the DS409 and 409+. Use the new backup benchmark NAS Charts to run other comparisons.

Product Synology DS209
Backup Throughput to QNAP TS-239 Pro target
Synology DS209+II
Backup Throughput to QNAP TS-239 Pro target
NAS-NAS 22.32 32.58
Table 2: NAS-to-NAS backup throughput test summary


DSM 2.2 finally adds iSCSI target support to Synology NASes for up to 10 targets. Setup is simple and similar to what I've found on other NASes. Figure 15 shows the iSCSI Target summary page, listing all available targets.

iSCSI Target List

Figure 15: iSCSI Target List

Clicking the Create icon brings up Figure 16, where you create a target. I generally don't mess around with target names. But the default name provides a hint of how you can change the name and not break the target by appending your.name1 to the end of the name. I allocated 10 GB of space from the RAID 0 volume I had created and left everything else alone. You can, however, enable and configure CHAP authentication if you want to secure the target.

iSCSI Target General settings

Figure 16: iSCSI Target General settings

Figure 17 shows the Advanced settings tab provides more settings, which are explained clearly in the online help.

iSCSI Advanced settings

Figure 17: iSCSI Target Advanced settings

Note that the feature allows Synology NASes to be used simultaneously as iSCSI targets and regular CIFS/SMB, NFS and AFP networked shares. Once you create the target, you'll need to connect to it and format it using tools provided by your client's OS.

I ran my Vista SP1 filecopy test on the 10 GB iSCSI target configured above and measured 48.3 MB/s write speed for the 209+II and 37.0 MB/s for the 209. Figure 18 compares the 209s with other dual-drive NASes that I've tested.

iSCSI write comparison

Figure 18: iSCSI write comparison

Reads came in at 59.0 MB/s for the 209+II and 44.4 MB/s for the 209. Figure 19 compares with other two-drive NASes.

iSCSI read comparison

Figure 19: iSCSI read comparison

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