Bug 195839 – sys-fs/udev-115-r6 - add elog info about changes dmraid device nodes

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Olliver Schinagl 2007-10-14 14:01:16 UTC]

In bug #189227 it was mentioned that udev-114 broke dmraid

udev115-r6 goes a step further.

I did a emerge -avuDN1 wine yesterday followed by a successfull etc-upgrade. none of the udev rules where mentioned to require specific merging.

After a long day of work I shut down my PC just to find out the next morning that fsck couldn't check/find my disks.

After some investigation it turned out /dev/md/[09] didn't exist anymore, they where moved to /dev/md[09].

Now this would be ok if my fstab where updated to use the new locations.

I use /dev/md/* on all my servers aswell (rather then /dev/md*) so to just bluntly change this behavior is kinda scary, making me to go to all locations, attach monitor/keyboard and fixing it manually.

[Comment 1 Jakub Moc (RETIRED) 2007-10-14 14:05:19 UTC]

Well, the ebuild certainly will NOT touch your fstab, no way. We could grep fstab and spit out some warning if you are using the abandoned ones, that's about it.

[Comment 2 Olliver Schinagl 2007-10-14 14:57:30 UTC]

Fair enough, I wouldn't expect it to touch my fstab :) but it shouldn't perform those changes until atleast the root partition matches with the new system.

Makes me wonder if I can use UUID's for md devices like i use them for my single disk system. maybe print that 'please use UUID=bla' for your root partition or the like if even poss.

Also, maybe a backwards compatibility layer would be nice, have symlinks from the old to the new location (with the warning et al).

[Comment 3 Jakub Moc (RETIRED) 2007-10-14 19:47:10 UTC]

(In reply to comment #2)
> Also, maybe a backwards compatibility layer would be nice, have symlinks from
> the old to the new location (with the warning et al).

Meh; that's equivalent to reverting the change altogether, the whole point was to get rid of those. :) 

[Comment 4 Olliver Schinagl 2007-10-14 22:22:01 UTC]

Yeah, but those changes gotta come incrementally :p

first it was /dev/md/X with a symlink /dev/mdX If you'd wanna change that, (why? the structured directory approach was nice n clean?) i'd say first swap files/symlink, so that /dev/md/X is a symlink to /dev/mdX and start warning users
Next version warn them again if they havent' fixed their fstab
and update after that warn really loudly and remove the old one (or wait 1 patch)

That's my opinion anyway :)

[Comment 5 Matthias Schwarzott 2007-10-21 20:37:20 UTC]

Added this rule back to udev-116-r1.