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[DeanoN]

I have 2 Seagate 750GB (ST3750330AS) drives in a mirror and am running the latest 1.07 firmware. My problem is that I only get 3MB/s transfer speeds!

I know it isn't the network because I tried 2 different switches (both Gig switches: 1 Netgear and 1 Linksys). On both switches copying from WinXP, Mac OS X, or Win2008 Server, I get unusable speeds.

What can I try or should I return this unit as defective to D-Link?

Dean

[ECF]

Have you tried another cable or tried a direct connection to the PC nic with set static IP addresses?

[DeanoN]

I have tried new cables all around. I have not tried a direct connection since I tried 2 different 1000BT switches, I don't think a direct connection would prove any different.

Any other ideas?

[ECF]

Not really I would recommend what I mentioned and locking the NIC and DNS-343 to GB and try a transfer. Do you have the drives configured as RAID1? Check the status and see if the drives are syncing at this moment.

[DeanoN]

I did what you suggested and locked the PC and the NAS at 1GB with fixed IPs and ran a cat6 cable between. I still get 10-12MB/sec transfer. The drives do not show that they are synching. Here is what it shows on the status page:

Total Drive(s):    2
Volume Name:    Volume_1
Volume Type:    RAID 1
Sync Time Remaining:    Completed
Total Hard Drive Capacity:    736656 MB
Used Space:    265399 MB
Unused Space:    471257 MB

What next?

[Clayton]

10 - 12MB is about right from NAS to PC, that's what I'm getting and PC - PC is around 40 - 50MB

[DeanoN]

Yes, it starts fast but then slows to a crawl. If I try to backup files to the NAS using Syncback or just by copying, it quickly slows down to 3MB/s and even slower. I have never completed a successful backup. Seems like constant data transfer chokes it.

[ECF]

So it is slowing to 3Mbps as well even connected directly to the PC?

[fordem]

Please be aware that transfer speeds are affected by file size - transferring a single 2GB file will be significantly faster (as much as 20~30MByte/sec) than transferring 1000x2MB files, even though you are transferring the same total quantity of data.

Taking it to the other extreme - transfer 1,000,000x2KB files and you'll be rewarded with transfer speeds in the region of 0.5KByte/sec.

Try to use a backup utility that compresses the data and writes them to the backup medium in larger blocks rather than as individual files.