resizing swap

[Andrey Meganov]

Sent from my iPhone as I am away from office


On 30.09.2008, at 0:30, Ryan Golhar <golharam at umdnj.edu> wrote:

> In case, anyone is interested in the the solution...
>
>
> You can't shrink a volume using resize2fs so rebooting into single  
> user mode and mounting / as read-only won't work.

That is working. Mounting fs readonly still allows you to gain  
exclusive access. Otherwise you wouldnt be able to fsck a filesystem  
without external boot.
>
>
> After some more googling, I found the following:
>
> 1. Write the FC rescue disk ISO onto a CD, and reboot the machine  
> from it.
> 2. Do not mount the file systems.
> 3. At the prompt, type:
>
> lvm
>
> 4. Within LVM, run these commands (comments are after the '#'s):
>
> lvm> vgscan # Will show the name of the Volume Group
> lvm> vgchange --available y VolGroup00 # Activates the VG and the  
> LVs in it
> lvm> lvscan # Should show the LVs as "ACTIVE"; the devices in /dev  
> it mentions should now exist
> lvm> exit # Quit, return to the prompt
>
> 5. Now resize the filesystem with this command (e.g., using device / 
> dev/VolGoup00/LogVol00):
>
> e2fsck -f /dev/VolGoup00/LogVol00 # fsck on the filesystem
> resize2fs /dev/VolGoup00/LogVol00 nnG # resize the fs to nn GB; nn  
> should be less than the current fs size
> e2fsck -f /dev/VolGoup00/LogVol00 # Do another fsck on the  
> filesystem; fix any errors which appear
>
> 6. Run lvm again and type:
>
> lvm> lvreduce -LnnG /dev/VolGoup00/LogVol00 # Resize the LV to nn  
> GB; nn should be the same as above
> lvm> exit # Quit, return to the prompt
>
> 7. Finally, do another filesystem check:
>
> e2fsck -f /dev/VolGoup00/LogVol00 # Do another fsck on the  
> filesystem; fix any errors which appear
>
> 8. Remove the CD and reboot.
>
>
>
> Andrey Meganov wrote:
>> Sorry, for not answering in the thread, i only get maillist digest.
>> You can shrink the root LV, while it's mounted readonly. Just boot  
>> to the single user, remount / read only and resize. Don't forget to  
>> shrink the fs first, then the LV
>> Regards,
>> Andrey
>> Sent from my iPhone as I am away from office
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