LVM of VolGroup00 with LogVol00

[Paul Howarth]

Patrick Nelson wrote:
> Paul Howarth wrote:
>> Patrick Nelson wrote:
>>> FC4 Up to date
>>>
>>> I went to do an Upgrade to FC5 and I don't have enough room on my 
>>> system (which is a VMware Instance).  So I thought well lets just 
>>> extend the Logical Volume.  The only problem is that LogVol00 is 
>>> mounted to /.  My head is sore from trying to find a way to run 
>>> resize2fs on this LV when it is mounted on /.  Is this even 
>>> possible?  I guess I could create a new LV in VolGroup00 and mount it 
>>> to /var, but I started down this road and I'm kinda hoping I can 
>>> figure it out.
>>>
>>> So far I've done:
>>>
>>> pvcreate /dev/sdb
>>> vgextend VolGroup00 /dev/sdb
>>> lvextend -l 267 /dev/VolGroup00/LogVol00 /dev/sdb
>>> all worked fine, but of course:
>>> resize2fs /dev/VolGroup00/LogVol00     -  doesn't work because its 
>>> mounted.
>>>
>>> Any suggestions would be great.  I am working out the /var to a LV 
>>> thing but...
>>
>> You can try this:
>>
>> # ext2online /
>>
>> However, with a size change as big as that it probably won't be able 
>> to help you. You'll need to boot from the rescue/install CD to resize 
>> the filesystem using resize2fs.
>>
>> Paul.
>>
> Well I'm up for that (rescue), but how?  I did try that and I couldn't 
> figure out how to call the /dev/VolGroup00/LogVol00 with resize2fs.

I've done it in the past by booting the install CD in rescue mode, 
getting it to mount all of the filesystems before dropping into a shell, 
then manually unmounting everything from /mnt/sysimage down. That leaves 
all of the necessary devide nodes in place, but with the filesystems not 
mounted so you can use resize2fs.

Paul.