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jerom1 | hello | 12:43 |
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jerom1 | Collin : For information, the patch applied on list-devices script doesn't work. I go to the server room will tomorrow in order to solve this problem. | 12:45 |
jerom1 | Have you an idea, can i force response with preseed in order to catch the "Human interaction" ? | 12:46 |
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cjwatson | jerom1: "doesn't work"? | 01:16 |
cjwatson | jerom1: you can just not preseed it at all, run through the UI by hand until the partitioner, alt-F2 and run 'list-devices disk' | 01:18 |
cjwatson | forcing a response with preseeding is silly, since preseeding is all about noninteractivity | 01:18 |
jerom1 | ok i test your command tomorrow | 01:21 |
jerom1 | now i have not access to the server | 01:21 |
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cr3 | I'm trying to build a mini iso so that I can simply boot from a CD device and then specify a root device like a USB drive which might not be bootable on some machines. apart from copying initrd.gz and vmlinuz, what else might I need? | 03:17 |
cr3 | can I simply install grub on the iso and then specify the USB drive or will that not work ifthe machine doesn't support booting from USB? | 03:18 |
cjwatson | the problem would be identifying the USB device to grub | 03:28 |
cjwatson | if you can reliably know what that is, then that should work fine | 03:28 |
cjwatson | is there some reason you can't use syslinux like we normally use on CDs? | 03:29 |
cr3 | cjwatson: might grub support specyfing a UUID? that would be a reliable way to identify the USB device | 03:35 |
cr3 | cjwatson: if not, I'm not sure how to identify the USB device. I'm not even sure what kind of educated guesses I could try | 03:36 |
cjwatson | you can pass root=UUID=... to the kernel, but grub still needs to know the device and doesn't accept UUIDs | 03:37 |
cr3 | cjwatson: as for using syslinux, I hadn't thought of that, I was imply browsing the hierarchy of files and directories on the live CD to inspire myself. I should probably familiarize myself with syslinux. | 03:37 |
cjwatson | (because it needs to read the kernel off the device) | 03:37 |
cjwatson | likely device names are (hd0), (hd1), etc. | 03:37 |
cr3 | cjwatson: usually, the USB device is mounted from /dev/sda1, but that apparently didn't work when passed to grub | 03:37 |
cjwatson | possibly (hd0,1) etc. if the device is partitiond | 03:37 |
cjwatson | ed | 03:37 |
cjwatson | please read the grub info documentation | 03:37 |
cjwatson | or get Jeff to fill you in on the basics | 03:38 |
cr3 | heh, I'm totally off the track there :) | 03:38 |
cjwatson | grub has its own device naming scheme | 03:38 |
cjwatson | if the BIOS can't boot from USB, it's possible that syslinux will have trouble - I think it just uses BIOS calls | 03:39 |
cjwatson | also, have you considered Smart Boot Manager instead of rolling your own? | 03:40 |
cjwatson | oh, hmm, I don't think SBM supports USB so never mind | 03:41 |
cr3 | cjwatson: if the BIOS can't boot from USB, that's why I considered booting the kernel from the CD and then providing a root device to the kernel | 03:41 |
cjwatson | ah | 03:41 |
cr3 | cjwatson: darn, that seemed like a promissing suggestion :) | 03:41 |
cjwatson | ok, you can do that with UUIDs | 03:41 |
cjwatson | worth a try anyway | 03:41 |
cr3 | cjwatson: you're saying to use UUIDs for which boot method? the cd? | 03:44 |
cjwatson | no the root= option in the append line passed to the kernel | 03:44 |
cr3 | cjwatson: to the kernel loaded from the cd, right? if so, I still need to build my own cd because the kernel modules on the root device have been updated and the initramfs doesn't seem to contain usb related modules | 03:46 |
cjwatson | yes | 03:59 |
cjwatson | I'd entirely expect you to need to build your own CD | 03:59 |
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cjwatson | aha. silly gtk. | 08:55 |
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