[HLUG] backup old disk

[Graham Cole]

That would be good Mark but once again I'll be away from home on the
meeting date unfortunately. Searching for LVM info I found someone
saying that a volume can be extended into 2 physical disks. 
I seem to remember someone (Julian?) saying he puts the home file into a
separate partition in case of trouble. Wish I'd done that. Anyway I'll
carry on with looking at LVM manipulation, in between other jobs and
building a greenhouse with re-used glass and other materials.
Thank you and hope to get to a meeting some time!

Graham

PS I'm hoping this will make sense when I study it:

 --- Logical volume ---
  LV Name                /dev/Ubuntu/root
  VG Name                Ubuntu
  LV UUID                gmoCX3-O1ys-P0k6-JUwS-nBQo-T020-g1mRo1
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                18.20 GB
  Current LE             4660
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           254:6
   
  --- Logical volume ---
  LV Name                /dev/Ubuntu/swap_1
  VG Name                Ubuntu
  LV UUID                MPiHx2-1jLN-aeYa-4Q4e-uNWG-YAXU-97SuWG
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                656.00 MB
  Current LE             164
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           254:7
   
lvm> 



On Thu, 2007-07-12 at 17:36 +0100, Mark Broadbent wrote:
> Graham,
> 
> If your still having problems then bring your PC down to the meeting
> next week and we can walk through how to do it.
> 
> Cheers
> Mark
> 
> On 12/07/07, Graham Cole <grahamcole at nerdshack.com> wrote:
> > Thanks very much Andrew, I'll work on that.
> > Graham
> >
> > On Thu, 2007-07-12 at 10:44 +0100, Andrew Hodgson wrote:
> > > Hi,
> > >
> > > It looks like you have a /boot partition, then the rest is mounted in an LVM system.  The LVM probably has multiple volumes, for the SWAP and various data partitions.
> > >
> > > Use the LVM command to get to the LVM prompt, then run lvdisplay to view the volumes.  You can mount these from /dev/mapper/lvmgroup-lvmvolume or /dev/lvmgroup/lvmvolume.
> > >
> > > Here is output of the lvdisplay command on my test RHEL5 system:
> > >
> > >   --- Logical volume ---
> > >   LV Name                /dev/VolGroup00/LogVol00
> > >   VG Name                VolGroup00
> > >   LV UUID                B5KpIt-54IK-sCdc-7Ae9-KsXb-zeYv-4A5fLE
> > >   LV Write Access        read/write
> > >   LV Status              available
> > >   # open                 1
> > >   LV Size                66.19 GB
> > >   Current LE             2118
> > >   Segments               1
> > >   Allocation             inherit
> > >   Read ahead sectors     0
> > >   Block device           253:0
> > >
> > >   --- Logical volume ---
> > >   LV Name                /dev/VolGroup00/LogVol01
> > >   VG Name                VolGroup00
> > >   LV UUID                bFVr3y-glrV-LNEQ-Tz7w-Mvqz-Me1E-QwXEEB
> > >   LV Write Access        read/write
> > >   LV Status              available
> > >   # open                 1
> > >   LV Size                1.94 GB
> > >   Current LE             62
> > >   Segments               1
> > >   Allocation             inherit
> > >   Read ahead sectors     0
> > >   Block device           253:1
> > >
> > > LogVol00 is the data volume, LogVol01 is swap, and they both belong to the LVM group VolGroup00.  These were created by the RHEL installer, and so why we get the generic names :).
> > >
> > > Thanks.
> > > Andrew.
> > >
> > > -----Original Message-----
> > > From: Graham Cole [mailto:grahamcole at nerdshack.com]
> > > Sent: 12 July 2007 10:32
> > > To: Herefordshire Linux Users Group.
> > > Subject: [HLUG] backup old disk
> > >
> > > Thanks John, it's about time I understood the partitions but "extended"
> > > and "Linux LVM" are jargon I don't understand. Both seem to be big so
> > > neither is a swap partition I guess.
> > >
> > > ~$ sudo fdisk -l /dev/hdc
> > >
> > > Disk /dev/hdc: 20.4 GB, 20490559488 bytes
> > > 255 heads, 63 sectors/track, 2491 cylinders
> > > Units = cylinders of 16065 * 512 = 8225280 bytes
> > >
> > >    Device Boot      Start         End      Blocks   Id  System
> > > /dev/hdc1   *           1          31      248976   83  Linux
> > > /dev/hdc2              32        2491    19759950    5  Extended
> > > /dev/hdc5              32        2491    19759918+  8e  Linux LVM
> > >
> > > This is what I got:
> > >
> > > ~$ sudo mount -t ext3 /dev/hdc2 /mnt/disk2
> > > mount: wrong fs type, bad option, bad superblock on /dev/hdc2,
> > >        missing codepage or other error
> > >        (aren't you trying to mount an extended partition,
> > >        instead of some logical partition inside?)
> > >        In some cases useful info is found in syslog - try
> > >        dmesg | tail  or so
> > >
> > > :~$ sudo mount -t ext3 /dev/hdc5 /mnt/disk2
> > > mount: /dev/hdc5 already mounted or /mnt/disk2 busy
> > >
> > > Not busy!? I did umount and checked that /mnt/disk2 was empty. Can it be
> > > busy while empty? Maybe it's something else and the error message is
> > > garbled info
> > >
> > > Graham
> > >
> > >
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Herefordshire mailing list
> > > Herefordshire at mailman.lug.org.uk
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> > >
> > >
> > >
> >
> >
> >
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> >
> 
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