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Old 03-12-2006, 05:44 AM   #1
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How to boot USB port on PCI controller

Hi folks,


I have following PCI USB 2.0 card;
4+1 port NEC
4 at the back-metal and 1 on the card

newly installed on the box. The card can be detected and setup. USB pendrive can be mounted with files retrieved/read. However the USB port can't boot. I need to boot a "DSL on a pendrive" which can be booted if plugged on the USB socket of the motherboard.

# lspci | grep USB
00:0b.0 USB Controller: NEC Corporation USB (rev 43)
00:0b.1 USB Controller: NEC Corporation USB (rev 43)
00:0b.2 USB Controller: NEC Corporation USB 2.0 (rev 04)
00:11.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 18)
00:11.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 18)
00:11.4 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 18)
Besides there are 4+1 ports on the PCI USB 2.0 card but only 3 detected.

Please advise how to make the USB ports on the card booted at starting PC.

Remark: I have tested all 4+1 ports, none of them working.


Old 03-13-2006, 05:38 PM   #2
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I believe that your options for boot devices is entirely limited by your motherboard's BIOS. I've seen motherboards that limited boot devices to just IDE disks and floppy disks while other motherboards include options for booting from SATA, SCSI, and network devices. Some motherboards have an option something like "Look for other boot devices" to catch any options that were not explicitly listed. Note that motherboards that are made for the computer hobbyist market are more likely to have more options. Motherboards made for particular brands may have fewer options.

In the case of USB devices you will want to look for an option to boot from SCSI devices.

If all else fails you might want to make an initrd style Linux boot floppy disk that would have support for USB and SCSI. That could possibly load a kernel off of a USB disk. I am not very knowledgeable about initrd yet but I do know that it could be used as I said. Of course the real kernel on the USB disk would also have to have USB and SCSI disk support built into it.

So look on your motherboard's CMOS BIOS settings for boot devices. Enable booting from SCSI devices and, if there is such a setting, enable looking for additional boot devices that are not specifically listed in the BIOS boot device list.

I would also expect better results if you were trying to boot from a USB port that is built onto the motherboard rather than booting from a USB add on card.

Last edited by stress_junkie; 03-13-2006 at 05:44 PM.


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