Il giorno mer, 17/10/2007 alle 09.14 -0400, J. Scott Kasten ha scritto: > On Wed, 17 Oct 2007, Giuseppe Sacco wrote: > > > Hi all, I am still testing new kernels on the ip32 platform (and > > learning kernel structure :-)). Currently I found problems in writing to > > USB block devices. I may read from a pendrive without problem, but when > > I try to write the process stop. This is the last part of a transcript > > of strace output for "pvcreate /dev/sdc" command: > > > > A few questions... > > * Which USB card, or more precisely, which chipset is on the USB card you > picked? > > I've had great luck with NEC and ALI chips thus far. giuseppe@sgi:~$ (lspci;lspci -n)| sort | grep ^01.08.02 01:08.2 0c03: 1033:00e0 (rev 04) 01:08.2 USB Controller: NEC Corporation USB 2.0 (rev 04) > * Which driver was loaded for the USB controller, OHCI, UHCI, EHCI? giuseppe@sgi:~$ lsusb Bus 003 Device 001: ID 0000:0000 Bus 002 Device 001: ID 0000:0000 Bus 001 Device 003: ID 067b:2517 Prolific Technology, Inc. Flash Disk Mass Storage Device Bus 001 Device 002: ID 067b:2515 Prolific Technology, Inc. Flash Disk Embedded Hub Bus 001 Device 001: ID 0000:0000 giuseppe@sgi:~$ dmesg | grep 0000:01:08 PCI: Enabling device 0000:01:08.2 (0000 -> 0002) ehci_hcd 0000:01:08.2: EHCI Host Controller ehci_hcd 0000:01:08.2: new USB bus registered, assigned bus number 1 ehci_hcd 0000:01:08.2: irq 15, io mem 0x280003000 ehci_hcd 0000:01:08.2: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004 So, I think that PCI device 0000:01:08.2 is managed by ehci and its assigned USB bus #001. Bye, Giuseppe
