DSM-G600, DNS-3xx and NSA-220 Hack Forum

I have no experience with RAID1, but I can confirm that when I moved from a 100mbit to a gigabit switch (and switched on jumbo frames) my write speeds over samba went up from 8 megabyte/s to about 18 megabyte/s.

IIRC then RAID1 should in theory slow down your writes and speed up your reads.

Stupid question probably, but are you sure that you are not connected to your router via the wireless network?

That is normal. I am experiencing higher transfer speeds of about 20 MB/s but also nowhere near the best expected performance with 1TB RAID 1.
There are threads discussing this in great detail on this forum.

Also make sure that you have the SATA-1 compatibility mini-jumpers removed from the Seagate disks, they ship with them installed.

It has nothing to do with the network setup but internal performance of the DNS-323. My personal estimate is that the performance will get worse with the size of the hard disks as there is more demand on the limited internal RAM resources.

demeo wrote:

What will removing the mini-jumpers do?

The 702.11 drives and before where shipping with a jumper that limited the interface transfer speed to SATA-1 i.e. 1.5 Gbits/s. The jumper could be removed and the speed then increases to 3Gb/s, which is SATA-2 speed.

Seagate were not very good at communicating this and you need to dig quite deep in the technical documentation to discover it.

I found the RAID1 speed to increase by approximately 20% with the jumpers removed.

estauss- I am not sure what you mean.

Everything is covered in here http://en.wikipedia.org/wiki/Serial_ATA

I had read in these columns about the Seagate jumpers.  Took a look on their site and not found anything.  Skydreamers comment:
''Seagate were not very good at communicating this and you need to dig quite deep in the technical documentation to discover it.''
was an understatement.  I had a dig around pretty deep to find the diagrams .  .  then removed the offending article!
Currently backing up and reformatting terabyte drives.  I have a gigabit system with cat5e and some cat6 cabling - notably between my main computer and the DNS-323s.

Demeo
With the Seagate jumper set I had been getting     8 - 11 meg/second
Without the jumper I am now getting around     8 - 11 meg/second
This is about the same as you, and much better than the 4 meg/sec I was getting with the 100 mbit NICs and cat5e cables. 
Even 4meg/sec is OK for music server and so on, (but a pain for monster size backups).   

Biscotte

All of my drives are in separate volumes
323 Box one  -  two discs - working areas at home
323 Box two -   two discs - backup areas at home (box mainly switched off)
323 Box three - two discs - offsite

Biscotte

demeo wrote:

I still have not been able to get speeds equivalent to my other gigabit network devices.

However, after disabling transmission, iTunes server (mt-daapd), and the UPnP server, my transfer speeds jumped as high as 20MB/s over FTP.

With all of the benefits of the DNS-323, I can live with these "slow" transfer speeds.

I am glad that the disk capacity has nothing to do with the slow speed, as the disk capacity grows so does the amount of RAM for mounting and caching the FS but I suppose it is still below the physical limits of the DNS-323.

Just to put your figures in perspective I have a very fast and resourceful Linux server running softRAID on the same disks that I am using in DNS-323 and while the former reaches top speed of 60MB/s on RAID-1 I get approximately 22MB/s on the latter.

demeo
As I said above, I get 8 to 11 meg/sec between NAS units.  Between computers in the house and the 323s it is up around the 11 to 14 meg/sec. 
Obvious question but I am curious - why do you need to have high transfer rates?  I do my big backups at night - 2.5 tera live space and twice as much again that is syncronised overnight - 8 hrs is a good long time.   Speeds above are ample for almost everything else. 
Looks like one of those climbing Everest questions and the answer is because it is there . . .
Just asking

Biscotte

Thanks for the links, mig!

Biscotte wrote:

Obvious question but I am curious - why do you need to have high transfer rates?

I'm simply comparing the transfer speeds between other devices on my 1GB connection to those of the 323. As I said in my first post, I can easily reach speeds of 60MB/s when I back up to a computer outside my D-Link 825 router (still gigabit, obviously). Basically, I wanted to make sure my DNS-323 was working correctly since it barely reached speeds of 10MB/s with only the gigabit router between my computer and it. Now, I know that this is normal given the hardware in the device. My concerns are gone and I'm completely satisfied with my purchase.