The DS409 Slim ships without disks. However, our review sample was supplied with three 250GB Western Digital Scorpio Blue 5,400 rpm hard drives. We tested read and write performance using a single drive and then a RAID0 array striped across all three disks. To measure transfer speeds, we set up a 1GB RAM disk on a PC and then copied a 901MB to the NAS across a gigabit switch using Windows Explorer.

Price per gigabyte is an issue, but its energy saving is exceptional
The results were very impressive. When reading from all three drives configured in RAID 0, we achieved a blistering top speed of 63.9MB/s – a result with beats many far pricier products. Write performance was also excellent at 38.3MB/s. Dropping down to a two-drive configuration shows the DS409 Slim is still more than capable of beating the competition, with read speeds of over 50MB/s, beating Buffalo’s Terastation III even when the latter is operating with four drives.
Verdict
The DS409Slim will cost you more per Gigabyte than a similarly stocked 3.5in model, but offers excellent environmental characteristics – notably low noise and reduced power consumption. While it is tiny, it does lose out on sheer build quality to the likes of Qnap or the pricier Buffalo units, due to its plastic construction. But when it comes to features and performance, the DS409Slim makes no compromises. ®
More Nas Reviews...
Buffalo Terastation III |
Promise Smartstor NS4600 |
Western Digital Sharespace |
Cisco Linksys Media Hub |

Synology Disk Station 409Slim
COMMENTS
ESATA?
70MB/sec isn't bad over gigabit ethernet, although isn't all that great compared to theoretical max. The benchmarks say that the equivalent products are slower, though, which probably explains the reviewer's enthusiasm.
I'd be more interested in seeing the ESATA performance, personally.
Pack this thing with 4 x SSDs and you have a very nice external disk array for a box limited by internal space. But very pricey if all you want is an external drive array - you would probably be better off using a 3.5" array with brackets to mount 2.5" disks if all you wanted was a 2.5" array.
WTB a dumb 2.5" external drive enclosure...
OkKTY8KK5U
"So... you'd consider a product "bad" because you, personally, don't just happen to be its target demographic?"
Yes, if the Reg seems to think so, then so do I.
@ AC 10:10 GMT
So... you'd consider a product "bad" because you, personally, don't just happen to be its target demographic?
That's fast?
I don't know much about these NAS boxen (I'm a fileserver man, myself,) but ~70MB/s seems rather slow to me. Any 3.5" drive available for $60 will read at 70mb/s, and your average 5 year old desktop with a gigabit card can push that speed over NFS.
Plus with those notebook drives you have to consider seek time, which is miserable compared to full size drives. And when you've got a torrent client and a user or two on there, you'll notice that seek penalty, especially using raid5, which is pretty much the only way to fly for 3+ drives of storage.
I just can't see much advantage over standard NAS boxen, which I generally don't see a huge need for. I suppose they're good if you don't want to / can't build yourself a linux fileserver. As it stands I have more unallocated LVM space on my raid5 arrays than you could hope to cram into this little box, especially if you want your data to be redundant (oh, trust me, you do.)
the vanilla 409
Can take either 3.5 or 2.5 disks and has very similar noise levels, but a bit lower - probably because they can fit larger, slower fans into the case.
The power consumption on the 409 is similar at idle (16w for the 409 versus 12w for the slim)
If only the Reg editors would ask their hardware reviewers to study up on benchmarking methodoloy or else focus on the usability and cite more thorough benchmarks than they can provide. benchmarking a nas properly ... it's a complicated process and the benches here provide precious little info, as is invariably the case in hardware reviews.
My tests of the 409 gui leave me very disappointed. It is much prettier than the Promise GUI, yes.
However, all that enabling NFS support does is start the NFS daemon - there is no option to work with /etc/exports given (that I could see) in the GUI in either simple or full mode. The only editor available at the commandline by default is vi. Asking a newbie try to work in vi and then try to get a working exports file going is just atrocious. At least the Promise NFS gui actually did ask "oh, um, who should have access to the NFS mounts?" and then set up an export, even.
Raid level migration is similarly murky. Expanding a raid from 1 disk to three in raid 5, you are not shown which disk will be used as the data source, you have to trust the device that it is in fact going to erase only the newly added disks. Very pretty but very uninformative as to which disk is where. Or how many total you will be left with.
If only the original promise 4300 weren't such a noisy beast! The 4600 is somewhat tempting, but does not give you what Synology does, real root access to the box and a package manager.
If I were recommending one of these to someone who wasn't a pro, though, I might recommend the gen 2 2disk Promise system in preference over a Syn 209, because while ugly the UI is actually more functional. I will wait and see to find out how loud the next generation of Promise systems are. The claim is that the 4600 is fairly quiet and fairly fast.




