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Old 11-10-2014, 12:43 PM   #1
JZL240I-U
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Registered: Apr 2003
Location: Germany
Distribution: openSuSE Tumbleweed-KDE, Mint 18.3+19.0, MX-18
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which btrfs / subvolumes mixed with ext4 are needed?


Okay, I didn't find the ideal description for this subject, I'll just outline the problem at (not too much, I hope ) length:

I have multi-boot environments organized over several disks like this, all as ext4 file sytems:

Code:
sdx1: /boot 
sdx2: swap
sdx3: FreeBSD
sdx4: extended
sdx5: openSUSE 12.3
sdx6: fedora
sdx7: mint
... {lots more like those, you get the picture}
sdxy: openSUSE 13.2
Now here it gets tricky: the new SUSE wants to use btrfs for / and XFS for /home. At the first glance no problem. SUSE may re-format its root-partition to btrfs and gets an extra one for /home to try out (encrypted) XFS. I also assigned sdx1 as its /boot.

Can all be done in "expert-mode" during the very easy install *haha, me an expert, what's next *

BUT: during the setup for btrfs it suggests subvolumes for btrfs [accept | remove], in particular something like "/boot/pc386/bios" and "/boot/pc386/uefi" and "/home" (besides /var /opt /log /<you-name-it>...).

Must / should / need these three be removed? I want those ext4 (/boot) and XFS (/home) partitions in working order, particularly after also installing the newest GRUB2 in the MBR. I don't want to cripple the system either. SUSE's documentation on their site doesn't yet extend to 13.2 in this regard. Suggestions, explanations, descriptions of experiences, etc. will be highly appreciated.

Last edited by JZL240I-U; 11-11-2014 at 02:40 AM. Reason: added intention of installing GRUB2 in the MBR
 
Old 11-27-2014, 02:51 AM   #2
JZL240I-U
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Registered: Apr 2003
Location: Germany
Distribution: openSuSE Tumbleweed-KDE, Mint 18.3+19.0, MX-18
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Oh dear. Nobody knows either? Well. I found this:

http://www.dedoimedo.com/computers/opensuse-13-2.html

Scroll down to "Installation" in that post to read the details.

In short, delete the subvolume entries for those directories, where you want to mount different (from your "/"-btrfs) file systems and all should be well. At least I tried it that way and it worked up to now...
 
Old 01-13-2015, 02:22 AM   #3
JZL240I-U
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Registered: Apr 2003
Location: Germany
Distribution: openSuSE Tumbleweed-KDE, Mint 18.3+19.0, MX-18
Posts: 4,258

Original Poster
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...but it killed the snapper tool in so much as GRUB won't offer any old snapshots to boot into. After sober reflection (and a shortlived bug notice in the SUSE bugzilla ) it is clear that it can't do it -- the kernel(s) reside below /boot and are part of the roll-back process when booting (permanently) into a snapshot. So -- suboptimal setup. Will be changed to the SUSE defaults with the next release. Hope this helps any interested parties .
 
  


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