[clue-tech] Re: Upgrading HDDs in an LVM configuration? -- SOLVED

[William]

Russell Glissmann wrote:

 > Just as a warning, I followed these instructions and added a smaller 
drive into a system and the instructions worked perfect.  However, on 
another system I added a much larger drive and caused the system to 
crash and burn.  I couldn't tell you now what the exact error was, but 
it was something related to LVM.  So, as usual, be careful!


Understood.  I upgraded two machines last night and one crashed pretty 
hard -- but it was my own fault.  Not understanding Red Hat's choice in 
naming the LVM segments, I inadvertently added 200G to the swap LVM. 
Turns out it's impossible to then remove that segment from swap because 
it's *always* in use.  No matter what I tried, I could not release the 
segment.  When I used a --force option, I hosed the machine.   LVM was 
throwing errors left and right, so I rebooted and found that the machine 
was lost; couldn't even boot it for a "kernel panic".

Luckily, I had a backup from only hours before.  Four hours and a full 
reinstall later, I had the machine back up with the new drive where it 
should be.  LVM is cool, but it isn't at all intuitive.  I hope future 
versions will have a more streamlined interface (it took forever to 
figure out the difference between the various command prefixes; lv, pv, 
pg, etc) that also has better safeguards.

-- 
William Kimball, Jr.
http://www.kimballstuff.com/
"Programming is an art-form that fights back!" (Unknown)

Catch me on-line!
ICQ:  11588575
AIM:  RyogaHibiki303
Yahoo! IM:  ryoga_not_pchan
Skype:  TeamSolColorado
_______________________________________________
CLUE-tech mailing list
CLUE-tech at cluedenver.org
http://cluedenver.org/mailman/listinfo/clue-tech