I installed Xubuntu when running a persistent live Ubuntu system
1. With the options 'toram' 'nopersistent'
It was truly live-only (and the installation worked).
2. With the default settings (no extra boot option compared what comes
with the iso file)
The casper-rw partition received and stored an install log (and the
installation worked).
---
tester@tester-SATELLITE-PRO-C850-19W:~$ sudo lsblk -f
NAME FSTYPE LABEL UUID
FSAVAIL FSUSE% MOUNTPOINT
sda
├─sda1 vfat 9B34-A9E8
├─sda2 ext4 aee3c5e5-e695-49e9-9598-ac8671f30181
├─sda3 ext4 cf57ee56-dba4-4494-9475-07af55933ac3
16,2G 25% /
└─sda4 ext4 e1ce9f48-8214-4cae-ba35-c4a62f7f6d78
sdb
├─sdb1 ntfs usbdata 0B539A8875BBB7D6
├─sdb2
├─sdb3 vfat usbboot 112D-C9F8
├─sdb4 iso9660 Xubuntu 20.04 LTS amd64 2019-11-10-02-05-43-00
└─sdb5 ext4 casper-rw 28567df4-354c-4061-ae21-431c30d01939
sr0
tester@tester-SATELLITE-PRO-C850-19W:~$ sudo mount /dev/sdb5 /mnt
tester@tester-SATELLITE-PRO-C850-19W:~$ sudo du -hs /mnt/*
1,4M /mnt/install-logs-2019-11-10.0
16K /mnt/lost+found
43M /mnt/upper
8,0K /mnt/work
tester@tester-SATELLITE-PRO-C850-19W:~$
---
I realize that this is a useful feature and not a bug.
But as stated earlier, this is new territory, and I think some of us,
who use live and persistent live drives may have problems to use drives
with this new feature. So it would still be valuable to get a
modification such that 'toram' alone will turn off saving log files to
the casper-rw partition and make it possible to unmount it.
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https://bugs.launchpad.net/bugs/1851123
Title:
Ubuntu 19.10 and focal live cloned create and mount casper-rw
partition
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https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1851123/+subscriptions
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