Re: [gentoo-user] usb1 performance out of usb2 external HD

[Iain Buchanan <iaindb@netspace.net.au>]

On Mon, 2006-01-16 at 07:21 -0700, Richard Fish wrote:
> On 1/16/06, Iain Buchanan <iaindb@netspace.net.au> wrote:
> > On Mon, 2006-01-16 at 06:40 -0700, Richard Fish wrote:
> > > On 1/15/06, Iain Buchanan <iaindb@netspace.net.au> wrote:
> > > >
> > > > 9.6 is pretty slow! I should be able to get at least double that...
> >
> > actually, I should be able to get 4x that...
> 
> No, you won't.  The max I've ever seen any USB drive run at is about
> 30MB/sec, even when the same drive installed internally will run at
> 65MB/sec.  My best 2.5" case and drive will pump about 25MB/sec.

well, I was estimating, and I am expecting about 30+MB/s given a friend
gets the same with the same drive.

> Ok, I've never used one of these combination devices.  I'm a little
> concerned, because the maximum throughput of most media readers is
> about 10MB/sec...so hoping this is not a limitation of the chipset.

nope, windows does the transfer in about 10/15 seconds, (I can time it
exactly if you're interested) making the speed (conservatively) about
7Mbytes/sec.

> > relevant dmesg:
> 
> Looks normal...
> 
> >  sdd: sdd1 sdd2 sdd3 sdd4 < sdd5 sdd6 sdd7 sdd8 sdd9 sdd10 sdd11 >
> 
> Damn, and I thought I made a lot of volumes.... ;->

yeah, its the way it has to be unfortunately.  This will eventually
become my internal HD, so I need it to dual boot, plus I added a few
more partitions for linux (/ /boot /usr /home) plus a couple for windows
- one for play and one for work... anyway.

> > $ zgrep USB /proc/config.gz | grep -v "^#"

> I think you need to turn on some of the options under USB Mass Storage
> support.  Particularly
> 
> CONFIG_USB_STORAGE_FREECOM=y
> 
> but I don't think there is any harm in turning all of them on...it is
> very likely that one of these will give you the best performance.

ok I'll try, thanks.

-- 
Iain Buchanan <iaindb at netspace dot net dot au>

Superior ability breeds superior ambition.
		-- Spock, "Space Seed", stardate 3141.9

-- 
gentoo-user@gentoo.org mailing list