Fedora Users — Re: LVM resize sanity check

Craig White wrote:

On Wed, 2008-10-22 at 11:42 -0400, brian wrote:

...

>>

I'd like to reduce /var first to free up some space, then give that
to /tmp using:

# umount /var # e2fsck -f /dev/VolGroup00/LogVol04 # resize2fs
/dev/VolGroup00/LogVol04 13G # lvreduce -L-6G
/dev/VolGroup00/LogVol04 # mount /var # umount /tmp # e2fsck -f

/dev/VolGroup00/LogVol03 # lvextend -L+6G /dev/VolGroup00/LogVol03# resize2fs /dev/VolGroup00/LogVol03 # mount /tmp


Does that ring any alarm bells?

[1] http://www.tldp.org/HOWTO/LVM-HOWTO/

---- I don't know about alarm bells but I would think that you would
have to 'lvmove' LogVol04 to make contiguous space for LogVol03

frequent usage of things like lvdisplay can give you some good clues
on where things are

I have no lvmove here. I have lvm2-2.02.24-1.fc7 installed. Did you meanpvmove? I'm looking at the man page now but the lightbulb remains dark.Can you elaborate on that?


I've also been reading this guide:
http://www.ibm.com/developerworks/library/l-lvm2/?ca=dgr-lnxw02LinuxLVM2&S_TACT=105AGX59&S_CMP=GR

Here's the mapping:

# lvdisplay -m /dev/VolGroup00/LogVol03
  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol03
  VG Name                VolGroup00
  LV UUID                yTInlj-Gr3z-2kkZ-YrmT-to5g-gXrj-pxNPBV
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                992.00 MB
  Current LE             31
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:4

  --- Segments ---
  Logical extent 0 to 30:
    Type                linear
    Physical volume     /dev/sda2
    Physical extents    2187 to 2217


# lvdisplay -m /dev/VolGroup00/LogVol04
  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol04
  VG Name                VolGroup00
  LV UUID                NWt5s8-27ZK-nGU0-DM2u-zkxm-VoJe-v0XGHD
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                19.53 GB
  Current LE             625
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:3

  --- Segments ---
  Logical extent 0 to 624:
    Type                linear
    Physical volume     /dev/sda2
    Physical extents    1562 to 2186

So, from what I can make out, it seems that the PEs of LogVol04 come*before LogVol03, which seems a bit strange.

(Incidentally, it's a bit disconcerting that google shows, "Restoreafter lvmove crash" for the first several entries for "lvmove".)


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