[gentoo-user] Re: Does USB devices share bandwidth?

2006-06-22 Thread James
张韡武 zhangweiwu at realss.com writes: Hello. My old sparc server have a USB extension card, which provides two USB slots at the back of the machine, driving a USB printer on Slot A. This printer runs at heavy load. because it cannot print the documents as fast as we need, I wish to add

[gentoo-user] Re: Does USB devices share bandwidth?

2006-06-22 Thread 张韡武
Thank you for all the answers so far:) Jarry explained the bandwidth a printer consume cannot be too high for USB 2.0 slots. This knowledge is very helpful, however at this moment the sparc box only have USB 1.x slot, driven by ohci, as I explained. Richard Fish kindly explained the mechanism

[gentoo-user] Re: Does USB devices share bandwidth?

2006-06-22 Thread 张韡武
This is really making me puzzle: sappho ~ # lspci | grep USB :02:02.0 USB Controller: NEC Corporation USB (rev 41) :02:02.1 USB Controller: NEC Corporation USB (rev 41) :02:02.2 USB Controller: NEC Corporation USB 2.0 (rev 02) When the kernel boots it shows me that only ohci device

Re: [gentoo-user] Re: Does USB devices share bandwidth?

2006-06-22 Thread Caster
On 6/23/06, 张�|武 [EMAIL PROTECTED] wrote:Another small question I hope someone with professional knowledge can help. I was told ECP/bidirectional printer cable can handle 2Mbps datatransfer, that seems to be suggesting using parallel cable is as good asusing USB1 cable (as USB1 is supposed to