Re: Sarge with ext3, reiserfs (3/4?) or xfs?
On Wed, 09 Feb 2005, Rogério Brito wrote:
> On Feb 09 2005, Henrique de Moraes Holschuh wrote:
> > Firewire devices are, at least in Brazil.
> Are you talking about devices or controllers? I have both and I also live
> here in Brazil (in Guarulhos/São Paulo, to be more specific).
Device as in "not a controller"...
> The cost of a vanilla controller was approximately the same as the cost of
> a vanilla USB2 controller.
Yes. I think that still holds, a USB2 and a Firewire-2 card are about the
same price in most shops.
> That's not to mention the headaches with usb-storage when transferring
> large amounts of data...
Never had any problems with usb-storage, but this is a kernel/controller
issue I think. And the USB subsystem has received a damn big number of
fixes both in the 2.4 and 2.6 trees in the last year.
My pet peeve with USB _support_ in Linux is that sometimes the !@#$ kernel
will stop noticing changes on my EHCI/UHCI devices, so I have to remove the
modules and reload them to get everything working again. I am almost sure
this is the kernel's fault.
> > I hope this changes, though. And if it does, I will buy Firewire devices
> > instead of USB2 ones.
>
> Indeed, that's a good decision, IMO. I don't know if USB devices (1.x or 2)
> support DMA. Please someone educate me here.
Depends on the controller, I think. Let me have a quick look on the Intel
82801EB/ER USB datasheet (onboard EHCI USB2 controller of my D875PBZ with 8
USB2 ports)... Yep, it can do PCI Busmaster operations (PCI DMA), in USB1
AND USB2 modes. Intel claim it is able to transfer the full 480Mbit/s on
EHCI mode.
> Given that my motherboard didn't have any USB2 port (but it does have USB
> 1.1 ports) and that I would have to choose between a Firewire card and an
> USB 2 card, I chose the former and am happy with it since I purchased it.
If your devices are both USB2 and Firewire, Firewire is clearly the way to
go :-)
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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