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Re: LVM question



Thank you for your answer.

Yes, I did use auto-Installation. In the meantime I reinstalled Linux and did the partitions by hand. I will keep your notes on the side for future references :-)

Nitai

Aleksandar Milivojevic wrote:

Nitai @ ComputerOil wrote:

Hi all,

I have a huge problem, with that I installed on a 25GB Partiton WinXP and then run the FC3 installer. With disk Druid I made a partition for swap (2GB), one for /boot, one for /home (10GB) and another for / (10GB). So, this made up another 25GB of my HardDisk.

Now the problem ist that I have a 80GB HardDisk and that I have another FreeSpace of 29GB which I somehow cant access anymore, because the Linux Installer made the /, swap and /home to a LVM Volume.

Does anymore know how I can get the remaining 29GB back? Better would be to have them as Fat32 partitioned so I can access them with WinXP.


...

vgdisplay:

--- Volume group ---
 VG Name               VolGroup00
 VG Size               50.00 GB
 PE Size               32.00 MB
 Total PE              1600
 Alloc PE / Size       688 / 21.50 GB
 Free  PE / Size       912 / 28.50 GB


This is strange. Have you used "autopartition" feature, or have you created partitions completely by hand? If you used "autopartition" feature, maybe you should make a bug report. If you created them by hand, well, than the only possibility is that you told installer to use all available space for LVM partition.

I don't think there's much you can do now, since pvresize command is not yet implemented. If you have 20GB+ disk somewhere, you might try popping it into the machine and doing something as described below. If you don't, your only option might be to reinstall Linux from scratch, but this time, make sure you size your partitions appropriately.

I'll assume new disk is /dev/hdb, and you are going to create single primary partition /dev/hdb1.

Also, from the above output, it is not visible on which partition your current physical volume is. Output of "pvdisplay" or "p" command in fdisk would show that. I'll assume it is /dev/hda3 (probably isn't).

Change device names appropriately.

# fdisk /dev/hdb

create partition on it, and mark it as type 8e (Linux LVM). The size must be at least what "Alloc PE / Size" line from vgdisplay output says.

Now, import the partition into LVM (create physical volume on it):

# pvcreate /dev/hdb1

Add this new physical volume to volume group

# vgextend VolGroup00 /dev/hdb1

Remove the "old" physical volume. This will probably take some time to complete (20GB+ of data needs to be moved from one disk to another):

# vgreduce VolGroup00 /dev/hda3 <- change to match your real PV

Remove the "old" partition from LVM system:

# pvremove /dev/hda3 <- same thing

Repartition the disk:

# fdisk /dev/hda

delete partition where PV was, create new one with correct size (which, again, must be at least what "Alloc PE / Size" line from vgdisplay output says). Make sure you tag partition as type 8e (Linux LVM). You may also create new FAT32 partition in this step. Make sure you tag that partition as type b (FAT32).

Now, this steps are basically the same thing as above. We are just moving things where they were, so that you can remove second disk from the system.

# pvcreate /dev/hda3
# vgextend VolGroup00 /dev/hda3
# vgreduce VolGroup00 /dev/hdb1
# pvremove /dev/hdb1



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