[arch-dev-public] ArchISO FTP Installer - Round 2
thomas at archlinux.org
Sat Apr 5 15:08:59 EDT 2008
Dan McGee schrieb:
> And then we are back to square one- having the installer being tightly
> coupled with a particular live CD. You should be able to run the
> installer from any environment, including another distro. Obviously we
> have a lot of work to do in order to make this possible, but the above
> simple logic seems to take us in the wrong direction.
If the particular file doesn't exist, we just leave the default
configuration alone, period.
>> You are missing the most important problem, one which you simply can't
>> dismiss by saying it's the user's problem:
>> The ordering in which drivers for several controllers are loaded is
>> changing with kernel updates, udev updates, or even randomly between
>> reboots. Almost everyone has several controllers (for example, one onboard
>> sata, one onboard ide, or in my case, one onboard sata, one onboard ide, one
>> pci ide). When sda becomdes sdc at the next boot, and is then sdb and then
>> sda again, then we have a basically unusable distribution. This is the issue
>> we should be concentrating on (I proposed several alternatives already), not
>> the ide vs. pata issue, which is - as mentioned - easily solved.
> I don't dismiss this as the users problem. Instead, I take a look at
> my own fstab which was recommended by us quite some time ago:
> # <file system> <dir> <type> <options> <dump> <pass>
> none /dev/pts devpts defaults 0 0
> none /dev/shm tmpfs defaults 0 0
> #/dev/hdc /media/cd0 iso9660 user,ro,noauto,unhide 0 0
> #/dev/hdd /media/cd1 iso9660 user,ro,noauto,unhide 0 0
> #/dev/hdc /media/dvd udf user,ro,noauto,unhide 0 0
> #/dev/fd0 /media/fl auto user,noauto 0 0
> LABEL=hdroot / ext3 defaults 0 1
> LABEL=hdboot /boot ext2 defaults 0 2
> LABEL=swapspace swap swap defaults 0 0
> Now why aren't we doing something like this instead? Obviously the
> links in /dev/disk/by-* would work just fine here. I can boot this
> system with either IDE or PATA (which only works 50% of the time), but
> the drives are all mounted correctly and in the right places.
Which was one of my suggestions, only I wouldn't use labels, but uuids
(not every partition has a label, all have uuids).
However, every other udev update breaks labels and uuids for
device-mapper devices (like lvm), so we'd need exceptions for those
(they have persistant names anyway) ... all not that pretty.
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