Re: CentOS and LVM partitions

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Author: der.hans
Date:  
To: Main PLUG discussion list
Subject: Re: CentOS and LVM partitions
Am 21. Sep, 2007 schw?tzte Matt Graham so:

>> Anybody have an opinion on using LVM partitions?
>
> LVM is great if A) you've read the LVM-HOWTO and understand it B) you don't
> need to read or write the disks on a non-Linux machine.
>
> A is important because there are a number of gotchas with the
> PV/VG/LV/filesystem resizing that are not immediately obvious. And it's
> *much* easier to expand PVs, VGs, LVs, and filesystems than it is to shrink
> them, so don't make 99% of the disk a PV unless you are sure you won't need
> any normal partitions. And make sure you've made your ext3 filesystems with
> reserved blocks in the GDT if you ever plan on expanding them! Check it with
> mke2fs -n first; older versions of e2fsprogs didn't allocate spare GDT space
> unless you told them to.


Didn't know about the ext3 gotcha. Thanks for the heads up.

> B is important because right now, nothing but Linux can grok LVM. This is why
> my laptop doesn't use LVM; occasionally I have to run 'Doze for work.


These systems will be GNU/Linux only.

ciao,

der.hans
-- 
#  https://www.LuftHans.com/        http://www.CiscoLearning.org/
#  "Luckily, this is a comic book, for which no idea is too complex."
#    -- Larry Gonick from The Cartoon History of the United States
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