OT:Linux question

[Fairlight]

Four score and seven years--eh, screw that!
At about Mon, Nov 22, 2010 at 09:32:19AM -0500,
Boaz Bezborodko blabbed on about:
> 
> Hey...I'm still sensitive about how you flamed me 3 years ago when I 
> first started using Linux and was asking some basic questions.

Ohhh, pffft.  Let it go...I did.

> The question is whether Centos 4 will recognize the extra space after I 
> extend the size of the existing logical drive using the HP array 
> utility.  If not then I have to add the extra space as another logical 
> drive and tell LVM to add it as a new physical volume before extending 
> the volume size.
> 
> I was hoping that someone on this list, given the vast amount of Linux 
> experience some people (like yourself) have, that this is something that 
> can be answered easily.

I never willingly use LVM.  In fact, the only systems on which I work where
LVM is deployed are ones where someone else set them up.  It's overly
complicated for most needs.

I don't think CentOS will automagically be able to -use- the space simply
because you added it to an LVM volume.  If my educated guess (and that's
exactly what this is) is correct, you not only have to extend the physical
volume with LVM, but then extend the filesystem size of the filesystem
which is residing on that volume.  So if it's ext3, or reiserfs, or
what-have-you, you'd need to resize that filesystem.  I think LVM takes care
of emulating one big "hardware" partition across multiple devices if needs
be, but the filesystem still has to be told.

If both of those requirements are met, then I think you'll be able to use
the space.

I also tend not to work with HP systems.  Almost all my clients are
(alas...) using Dell.  No experience with HP's RAID management, here.
Actually, I really don't have to deal with the RAID stuff myself,
generally.  If one goes south, someone on-site rebuilds the array.  And if
that fails (and it has 75%+ of the times it's needed to be done, even with
RAID 5), then we have a fun reinstall and restore of data.

I'm old-school.  I work with fdisk, not LVM.  Hate LVM.  I understand the
power, I just have yet to -need- to learn its complexities when simpler
solutions will do.

mark->
-- 
Audio panton, cogito singularis.