Dan Norton: henny|i > My first Linux install was about one year ago. After some missteps, I have > used Debian 8 in reasonable satisfaction on the desktop during that year. > Now I want to leave 8 in place and do a network install for Debian 9 on the > same disk and switch back and forth at boot time.
Your disk setup allows to do this comparably easy, but I would think twice whether that is actually what I want to do. You end up with two systems which you have to maintain and, most importantly, you cannot properly share your /home. Most programs that save their settings to $HOME will automatically upgrade their configuration files on first start with a new version and after that you have to assume that the older version cannot read it anymore. I realize that this is part of your disk space calculation but I want to stress that the result is probably not something that you will want to use for an extended period of time. > LVM reports as follows: > > dan@debian:/$ sudo vgdisplay -C > VG #PV #LV #SN Attr VSize VFree > debian-vg 1 5 0 wz--n- 976.56g 938.20g You can vgreduce debian-vg easily to make room for your planned debian9-vg. > So there is plenty of disk space for the two Debians and more besides. The > question is how to prepare to install 9? My guess is to define another > volume group called debian9-vg perhaps but how will this be recognized > during network install? Yes, it will. It should also be possible to vgreduce debian.vg and vgcreate debian9-vg inside the installer, but I would be more comfortable doing that from the running system, using the regular tools. During installation, you just have to make sure that all LVs in debian-vg are marked as "Do not use". > I've clobbered stuff before during installs and I'm > gun shy. Maybe there is a better way. Any thoughts on this will be > appreciated. It happens to everybody. The only things that help are a good plan and concentration on the task at hand. :) J. -- I like my Toyota RAV4 because of the commanding view of the traffic jams. [Agree] [Disagree] <http://archive.slowlydownward.com/NODATA/data_enter2.html>
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