Need help resizing LVM patition

[Andrew Konosky]

Petr Novak wrote:

>Hi Andrew,
>
>you can try to pvmove all LVs allocated on /dev/hda4 to /dev/hdb2,
>looks to me there is only problem with space for 10GB of LV, that you
>can solve with resize_reisefs or resize2fs, then lvreduce. Then u can
>remove /dev/hda4 from VG and end up with 35GB of free space on hda.
>
>On Sun, 19 Dec 2004 18:08:41 -0600, Andrew Konosky
><TerranAce007 at comcast.net> wrote:
>  
>
>>I have two 80gb hard drives, and use one ~35gb LVM physical volume on
>>/dev/hda4 and one ~75gb LVM physical volume on /dev/hdb2. My /boot
>>partition is /dev/hdb1 in ext3 and my / is mounted on
>>VolGroup00/LogVol00 in ext3 also. I want to reduce the 75gb hdb2 to free
>>up about 25gb so I can have room to install and try out some other linux
>>distros.
>>
>>I have searched online for insructions, but all I can find is stuff on
>>resizing reiser and ext2 partitions. I am not sure if I need to resize
>>the LVM voume on hdb2 first, and then the filesystem, or if I do it the
>>other way around. What commands do I run to do this?
>>
>>I want to end up with about 25gb free space to install Debian 3.1 on.
>>And also, how do I configure the grub bootloader for Debian? I would
>>like to keep Fedora's grub as is, and just add one entry for Debian that
>>launches a separate grub menu with Debian and its different kernel
>>versions. Would I just install grub on the new partition? What entry do
>>I make in Fedora's grub.conf?
>>
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>>
>>    
>>
>
>
>  
>
Can you describe in more detail how I would o this? I have been reading 
more stuff on LVM about replacing failed hard drives, and I have been 
considering doing exactly what you just suggested. Would I resize the 
ext3 filesystem by shriking it 35 gb first, then pvmove /dev/hda4, or 
the other way around?