Other External products

[SkinnyVinny]

I purchased a 1tb external hd yesterday. I have 500gb of data to back up. It has been over 24 hours and it is only 38% complete. Is this normal?

Model: ST310005EXA101-RK

My System;

Intel Core 2 Quad Q6600 2.4Ghz

4gb RAM

Win 7 RC

[fzabkar]

Using Google's calculator ...

http://www.google.com/search?q=500+x+10%5E9++x+0.38+%2F+24+%2F+60+%2F60&btnG=Search

... your transfer rate works out to 2.2 Mbytes/sec.

That's not normal. USB 2.0 external hard drives usually achieve around 20MB/s.

I would verify that your drive is not connecting at USB 1.1 speeds.

How does Microsoft's UVCView utility detect your USB drive? Does it show OHCI, EHCI, or UHCI USB Host Controllers?

http://www.users.on.net/~fzabkar/USB_IDs/UVCView.x86.exe

I would also check whether any of your drives, either internal or external, have been downgraded to PIO mode. Windows XP will downgrade a drive's performance from DMA mode to PIO mode if it detects more than 6 CRC errors.

DMA Mode for ATA/ATAPI Devices in Windows XP:

http://www.microsoft.com/whdc/device/storage/IDE-DMA.mspx

DMA reverts to PIO:

http://winhlp.com/node/10

You could benchmark your drives using HD Tune:

http://www.hdtune.com/download.html

[TDR]

I have similar problem. I have a new 2TB Seagate FreeAgent that is supposed to be USB2. When copying to/from Windows Vista it appears to run ok, ~30MB/sec. But when copying to BlackArmor 220 through USB port it is UNBELIEVABLY slow and the connection name that the NAS gives it is "usb1 1.1". It looks like the BlackArmor 220 is connecting it as USB 1.1 device. Any ideas what might be going on?