Bug 519488

Summary:	hanbook should not tell users to lazy umount /mnt/gentoo/boot
Product:	[OLD] Docs on www.gentoo.org	Reporter:	nobody <noreply>
Component:	Installation Handbook	Assignee:	Sven Vermeulen (RETIRED) <swift>
Status:	RESOLVED FIXED
Severity:	critical	CC:	docs-team
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://www.gentoo.org/doc/en/handbook/handbook-amd64.xml?full=1#reboot
Whiteboard:
Package list:		Runtime testing required:	---

Description nobody 2014-08-09 11:30:42 UTC

I only check the amd64 handbook part, but it should be fix in every installation guide that do that.
Please note http://wiki.gentoo.org/wiki/Complete_Handbook/Finishing_off#Exiting_the_chrooted_environment doesn't have that problem.

It's unsafe to lazy umount a live filesystem, so suggesting to lazy umount /mnt/gentoo/boot is dangerous for the user boot partition.
As soon as /mnt/gentoo/boot is lazy umount, nothing prevent user from umounting /mnt/gentoo and rebooting, while /mnt/gentoo/boot might still be in use and need more time to finish works, endup in a damage filesystem.

Handbook must be fix to :
1/ prevent damaging the user boot filesystem
2/ avoid teach user bad manner to use lazy umount instead of classic umount on any live filesystem. Hanbook is a teacher for many new users, if handbook teach them to lazy umount their boot, they might always lazy umount it later without knowning what they are doing.


Reproducible: Always




Seen because of http://forums.gentoo.org/viewtopic-t-997060.html thread that expose it.

Comment 1 Sven Vermeulen (RETIRED) gentoo-dev

2014-08-17 16:38:50 UTC

Lazy umount is no longer used for the persistent directories