[clug] USB storage on USB2 with hubs
E.
kane at areujoking.com
Sat Jan 28 21:31:17 GMT 2006
> -----Original Message-----
> From: linux-bounces+kane=areujoking.com at lists.samba.org
> [mailto:linux-bounces+kane=areujoking.com at lists.samba.org] On
> Behalf Of Rodney Peters
> Sent: Saturday, 28 January 2006 10:32 AM
> To: linux at lists.samba.org
> Subject: Re: [clug] USB storage on USB2 with hubs
>
> Agreed, it's an innovative idea.
>
> AFAIK, performance will be constrained by all the ports on a
> hub (including those festooning the rear of a PC) fanning
> into the same 480 Mb/s bottleneck.
> My USB devices never approach that, but I've not investigated
> whether it's the VIA controller or bridge chips in the
> devices. That translates to 60 MB/s less USB overhead, less
> USB/ATA bridge overhead, less RAID overhead, less ATA
> overhead z..z..z....
>
> I've run into this problem trying to burn a CD image from a
> USB drive to a USB burner.
>
> Any chance of adding a Firewire card or second USB card to
> spread the load around a bit ?
>
>
> Rod
A warning about firewire: a number of the firewire drive cases I have
encountered do not fully initialize when hot-swapped or plugged into a
running machine and require a reboot to use the drive.
Cheers,
E.
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