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Resize root partition upon first boot
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EliasJonsson
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PostPosted: Mon Sep 07, 2020 2:56 am    Post subject: Resize root partition upon first boot Reply with quote

Dear Gentoo community,
I have created a Raspberry Pi 4 image of an 8 GB SDcard.
Now how does one make the system resize its root partition upon first boot to use all available storage capacity on the storage medium that the image was written to?
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alamahant
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PostPosted: Mon Sep 07, 2020 9:07 am    Post subject: Reply with quote

Can you boot the pi with any livecd?
Is this something you can do with pi?
If yes do this.
Or remove the sd card and plug it in to your laptop.
Then run
Code:

lsblk ####find the name of the partition your Gentoo image is in.
e2fsck /dev/sdxx
resize2fs /dev/sdxx

Then reboot.
:D
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NeddySeagoon
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PostPosted: Mon Sep 07, 2020 10:14 am    Post subject: Reply with quote

EliasJonsson,

Most of the Pi distros do this as they don't know what size SD card they will end up on.
The root partition must be the last partition on the SD card, with all the unallocated space after it.
The partition can then be 'grown' into the unallocated space, then the filesystem can be grown to fill the enlarged partition.
Not all filesystems support online resizing. extX is OK.

Have a look at Sakakis 64 bit distro.
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
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NeddySeagoon
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PostPosted: Mon Sep 07, 2020 10:15 am    Post subject: Reply with quote

Moved from Other Things Gentoo to Gentoo on ARM.
Its one of these
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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Sakaki
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PostPosted: Mon Sep 07, 2020 12:00 pm    Post subject: Reply with quote

EliasJonsson,

the autoexpand_root OpenRC service from gentoo-on-rpi-64bit is installed by this ebuild, the service script itself may be reviewed here.
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sakaki
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EliasJonsson
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PostPosted: Mon Sep 07, 2020 1:15 pm    Post subject: Reply with quote

Sakaki,
Thank you very much, that was exactly what I was searching for.
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