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Add missing information for geom_mirror metadata.

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PR:		124434
Submitted by:	Philip M. Golluci <pgolluci at p6m7g8 dot com>
MFC after:	3 days

Prodded through:	bugbusters@
This commit is contained in:
Remko Lodder 2008-07-07 11:44:57 +00:00
parent 948d0fc926
commit b5db8ef03b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=180345
1 changed files with 14 additions and 0 deletions
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@ -412,6 +412,20 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 8.x IS SLOW:
are encouraged to use these devs instead of (old) "/dev/dsp%d.%d".
This does not affect those who are using "/dev/dsp".
20061122:
geom(4)'s gmirror(8) class metadata structure has been
rev'd from v3 to v4. If you update across this point and
your metadata is converted for you, you will not be easily
able to downgrade since the /boot/kernel.old/geom_mirror.ko
kernel module will be unable to read the v4 metadata. You
can resolve this by doing from the loader(8) prompt:
set vfs.root.mountfrom="ufs:/dev/XXX"
where XXX is the root slice of one of the disks that composed
the mirror (i.e.: /dev/ad0s1a). You can can than rebuild
the array the same way you built it originally.
20061122:
The following binaries have been disconnected from the build:
mount_devfs, mount_ext2fs, mount_fdescfs, mount_procfs, mount_linprocfs,