External USB faster than SATA to SATA

[skid00skid00]

I run MS backup regularly, on an Intel C2D 6600 on an Intel D975XBX2.
I've got 3 new internal WD 7200 rpm Caviar SATA drives, and a 5 yr-old
external LaCie 320 GB drive.

Saving C: to D: (both SATA) takes 4 times longer than saving C: to
LaCie on USB!

The internal drives are running as IDE drives. Transfer mode is "DMA
if available" and Current Transfer Mode is Ultra DMA Mode 5 on the
internal drives.

Does this make sense to anyone?

 

[Rod Speed]

I run MS backup regularly, on an Intel C2D 6600 on an Intel
D975XBX2. I've got 3 new internal WD 7200 rpm Caviar
SATA drives, and a 5 yr-old external LaCie 320 GB drive.

Saving C: to D: (both SATA) takes 4 times longer than saving C: to LaCie on USB!

Must be something seriously ****ed there somewhere.

The internal drives are running as IDE drives. Transfer mode is "DMA
if available" and Current Transfer Mode is Ultra DMA Mode 5 on the
internal drives.

Does this make sense to anyone?

Nope, something is seriously ****ed there somewhere.

See what HDTach has to say about the relative drive speeds
and see what happens when you time a manual copy of a
couple of very large files to the two different types of drives.

 

[JAD]

I have seen this when a generic sata driver is used when a specific one is
needed. Did you load the drivers from the MB install disk to start out?
or let XP do it and left it at that?

 

[skid00skid00]

The write buffers were turned off...

Now the SATA drives are 4x faster than the USB drive.
Thanks for the responces.