Re: Extremely poor umass transfer rates

[Mark Rosenstand <mark@ossholes.org>]

On Thu, 2005-04-28 at 19:19 +0100, Paulo Marques wrote:
> > | The line that 'hald' puts in fstab looks like this:
> > | 
> > | 	/dev/sdb /media/usbdisk vfat \
> > | 		user,exec,noauto,utf8,noatime,sync,managed 0 0
> 
> The "sync" flag is what is killing your performance. It is needed if you 
> intend to remove your usb pen without warning, but if you are going to 
> unmount carefully you don't need it at all.
> 
> Try mounting the device as root somewhere else without the "sync" flag 
> and measure the performance that way, to see the difference.

Wow. That seems to speed things up alot. However I can't unmount it
again, I keep getting "umount: /media/usbdisk: device is
busy" (twice(?)). It's been 5 minutes since I did the transfer (4 MB
file) now.

> I hope this helps,

It sure did. Thanks!

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