On Oct 15, 2014, at 11:55 AM, Dan McGhee <[email protected]> wrote: > > On Oct 15, 2014, at 11:46 AM, Armin K. <[email protected]> wrote: > >> On 10/15/2014 06:43 PM, Dan McGhee wrote: >>> In combatting the HP-Microsoft-UEFI coalition on my laptop, complete gory >>> details after I get it figured out, I am prepared to take drastic action >>> with what’s on my internal drive (/dev/sda). But I want to make sure I can >>> boot LFS from an external disk (/dev/sdb) and backup what I have done so >>> far. >>> >>> Although it’s not convenient, I can get to grub on /dev/sdb, but when it >>> loads the LFS kernel, I get a KERNEL PANIC because the only device that’s >>> loaded at the time is /dev/sda. Booting to LFS on /dev/sda from /dev/sdb >>> works wonderfully. >>> >>> ISTR from reading something, sometime, somewhere that when attempting to do >>> this I need to delay the kernel process somehow until there’s a UDEV >>> trigger to attach /dev/sdb. But I can’t remember, nor can I find, how to >>> do this. I *think* the kernel command line option for this is “root >>> delay,” but I’m not sure. It it is, what is a good time? 1 sec, 2 sec? Or >>> is there any other command line option for this. I see a number of them >>> for usb stuff, but I don’t think they apply to what I want to do. >>> >>> Thanks, >>> Dan >>> >> >> You need to build the "USB Storage" driver into kernel. > Thanks, Armin. I thought it was so I “grepped” my config file and, drat!, > bah-humbug!, it was a module. Rats! Here goes.
Thanks Armin, Douglas and Richard for your help. The guidance from each of you really helped. This exercise helped me get back to the “base point” from which I like to operate in LFS. When I build a new LFS, I copy the kernel config file from the “old” LFS and address the new options. I’m finding that I made more mistakes in 7.4 than I want to admit. One of them was not compiling *all* the USB modules I use into the kernel—and I’ve carried that error forward making the assumption….. I’m working with rootdelay=5 right now and will experiment to reduce it later. Now I can try to do drastic work on the EFI partition of my hard drive and will be able to get LFS back to fix anything I break. As Sgt. Preston of the RCMP used to say, “King, this case is closed.” [Reply was “Woof!] Dan
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