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Date: Mon, 16 Jan 2006 17:47:04 -0700
From: Trenton Adams <trenton.d.adams@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] usb1 performance out of usb2 external HD
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On 1/16/06, Iain Buchanan <iaindb@netspace.net.au> wrote:
> On Mon, 2006-01-16 at 10:46 -0700, Trenton Adams wrote:
> > Are you mounting with the "sync" option, or no?  Try it with, and
> > without.  If you do it without, time what it takes to do the copy, and
> > unmount.  unmount will do the actual sync.
>
> hey, that sped it up heaps!
>
> $ sudo mount -t vfat -o uid=iain,gid=users,async /dev/sdd6 /mnt/tmp/
> $ time { cp /usr/portage/distfiles/OOo_2.0.1_LinuxIntel_install.tar.gz /mnt/tmp/; sudo umount /mnt/tmp/; }
>
> real    0m11.134s
>
> thats a huge increase (11s instead of 81s!), so how come hdparm still
> reports 9MB/s?

I'm wondering if we should be reporting this to the kernel guys.  I
see this on *all* linux systems with kernel 2.6, but I'm not sure
about 2.4.  But, I think I'll try enabling some options that Richard
mentioned first.

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