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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Desktops > Slow! USB data transfer

Slow! USB data transfer
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Googer-Giger
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Join Date: Jul 2006
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Jan 27, 2011, 04:58 PM
 
Hey guys, I was trying to copy about 29MB of files to a crucial gizmo usb drive. I have copied these files before dozens of times and I get standard usb 2 speeds on my MBP and G5s and pretty much everything else. Right now on my MP it's taken about 5 minutes to copy just 20MB of the 29... Directly plugged into the front, and now the 3rd USB drive.

CPU usage is at 86% Idle, .3%User/.24% System. Ram is at 10GB free/12GB. Spotlight is not indexing and I don't have any VMs running, just after a restart.

What the hell is going on?

I can cap a detailed console list, but nothing has happened in the last 5 minutes at all, before the copy it was steam just yelling at me.

Jesse
I miss the days of the G5 and XPS Pentium 4 running side by side as high-end machines.
     
reader50
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Jan 27, 2011, 05:18 PM
 
Sounds like it's running at USB 1.1 speeds. Try another USB flash drive, see if you get full speeds. And try this drive on the G5.
     
Googer-Giger  (op)
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Jan 27, 2011, 05:19 PM
 
Update: Sorry for the bother, I guess the files were corrupt or something, I just transferred an 85MB file in all of 30 seconds.

Thanks
I miss the days of the G5 and XPS Pentium 4 running side by side as high-end machines.
     
ghporter
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Jan 27, 2011, 07:59 PM
 
I'd agree with your assessment. File copy functions like to error check-if the copied file doesn't match some signature, the function will often try again. And again. Often block by block. I'd call "really slow file transfers" a good indication that the subject files were damaged in any situation.

Glenn -----OTR/L, MOT, Tx
     
Googer-Giger  (op)
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Jan 27, 2011, 09:12 PM
 
I went to another hard drive where the files were backed up, they transferred fine.

I appreciate speedy responses, especially from mods!

Jesse
I miss the days of the G5 and XPS Pentium 4 running side by side as high-end machines.
     
   
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