Re: [PLUG] Fixing /boot/ too small

[JP Vossen via plug <plug@lists.phillylinux.org>]

Thanks Rich, that's a good point to mention for anyone who finds this 
via a search.  UUIDs also bug me because I find them really hard to 
read, so labels might be nicer for that too.

There's an argument for just using the original /dev/sda2 names.  Most 
of the time when I replace something I want it to go back to exactly the 
same place to do the same thing...even if it's a new file system on a 
new partition on a new drive.  I know someone will then argue, "but 
wait, boot order can change."  And it can, but it doesn't always... 
UUIDs *always* change and labels can be forgotten to be added.  YMMV, I 
guess.  :-)

For now I'm going to only change 1 thing at a time, but...good food for 
thought.

On 4/10/20 1:33 PM, Rich Mingin (PLUG) via plug wrote:
> FWIW, I switched from UUID to label, because UUID changes any time you 
> remake a filesystem or format, while labels can be persisted.
>
> Not terribly relevant to your current situation, since you'd be moving 
> your boot files from one partition label to another as well.
>
> On Wed, Apr 8, 2020 at 9:49 PM JP Vossen via plug 
> <plug@lists.phillylinux.org <mailto:plug@lists.phillylinux.org>> wrote:
>
>     On 4/8/20 12:08 AM, brent timothy saner via plug wrote:
>      > On 4/7/20 23:24, JP Vossen via plug wrote:
>      >> Summary: I need to fix some Mint-19 workstations where /boot/ is
>     too small.
>      >
>      > is it using UEFI or BIOS booting?
>
>     They are old, it's BIOS and MBR, but UUIDs are in use in /etc/fstab.
>     And everything Just Works now, the only thing I need to do is move
>     '/boot/' from its own md device into '/' so there is space.
>
>
>     `/etc/fstab` excerpt (updated to but not rebooted):
>     ```
>     # / was on /dev/md2 during installation
>     UUID=bafdc515-511e-44b9-85d0-e1cd164cc58c /               ext4
>     errors=remount-ro 0       1
>
>     # /boot was on /dev/md1 during installation
>     #UUID=21fd376b-fa9a-4dd0-bfa3-f3ca314d0648 /boot           ext4
>     defaults        0       2
>     # 2020-04-07 /boot/ HACK
>     UUID=21fd376b-fa9a-4dd0-bfa3-f3ca314d0648 /boot.old        ext4
>     defaults        0       2
>     ```
>
>     And (edited for clarity):
>     ```
>     $ df -hl
>     Filesystem     Type      Size  Used Avail Use% Mounted on
>     /dev/md2       ext4      913G  285G  582G  33% /
>     /dev/md1       ext4      190M   86M   90M  49% /boot.old
>
>     $ lsblk -f
>     sda
>     ├─sda1  linux_raid_member mint:0 9ce43e0d-5683-e2fb-e0e5-abaaf06ca0f8
>     │ └─md0 swap                     314df59b-cdd2-46a4-b07b-9d0bfb77b0f7
>     ├─sda2  linux_raid_member mint:1 79eb3cbb-2e42-5a08-4be3-39ff2a609919
>     │ └─md1 ext4                     21fd376b-fa9a-4dd0-bfa3-f3ca314d0648
>     /boot.old
>     └─sda3  linux_raid_member mint:2 e696d253-57f3-ca09-c8ec-d5b452209e51
>         └─md2 ext4                   
>       bafdc515-511e-44b9-85d0-e1cd164cc58c /
>     sdb
>     ├─sdb1  linux_raid_member mint:0 9ce43e0d-5683-e2fb-e0e5-abaaf06ca0f8
>     │ └─md0 swap                     314df59b-cdd2-46a4-b07b-9d0bfb77b0f7
>     ├─sdb2  linux_raid_member mint:1 79eb3cbb-2e42-5a08-4be3-39ff2a609919
>     │ └─md1 ext4                     21fd376b-fa9a-4dd0-bfa3-f3ca314d0648
>     /boot.old
>     └─sdb3  linux_raid_member mint:2 e696d253-57f3-ca09-c8ec-d5b452209e51
>         └─md2 ext4                     bafdc515-511e-44b9-85d0-e1cd164cc58c
>     ...
>     ```
Later,
JP
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