lvm

[Patrick Dupre]

> Patrick Dupre wrote:
>> Hello,
>>
>> I duplicate an hard drive to another one with logical partition.
>> I kept the / on a standard partition, put the /usr on /dev/VG1/usr, etc...
>> When I mount the logical partitions I do  experience any problem but when
>> I boot the machine on the logical partition I get an error from the
>> /etc/fstab.
>>
> How did you duplicate the drive?
cp -a 
(I used to do it that way).
>
>> fsck complains
>> The superblock could not be read or does not describe a correct ext2
>>  filesystem.  If the device is valid and it really contains an ext2
>>  filesystem (and not swap or ufs or something else), then the superblock
>>  is corrupt, and you might try running e2fsck with an alternate superblock:
>>      e2fsck -b 8193 <device>
>>
>> I am using grub,
>>
>> In the fstab I put:
>> /dev/VG1/usr    /usr
>>
> Please post your entire /etc/fstab.

/dev/sdc5               /               ext3    defaults        1 1
/dev/mapper/VG1-usr     /usr            ext3    defaults        1 2
/dev/VG1/usr_lib       /usr/lib        ext3    defaults        1 2
/dev/VG1/usr_local     /usr/local      ext3    defaults        1 2
/dev/VG1/usr_src       /usr/src        ext3    defaults        1 2
/dev/VG1/tmp           /tmp            ext3    defaults        1 2
/dev/VG1/home          /home           ext3    defaults        1 2
#/dev/VG1/backup       /backup         ext3    defaults        1 2
/dev/VG1/iso_image     /iso-image      ext3    defaults        1 2
tmpfs                   /dev/shm        tmpfs   defaults        0 0
devpts                  /dev/pts        devpts  gid=5,mode=620  0 0
sysfs                   /sys            sysfs   defaults        0 0
proc                    /proc           proc    defaults        0 0
/dev/sdc1               swap            swap    defaults        0 0
/dev/fd0                /mnt/floppy      msdos,auto      noauto,user,umask=0 0 0

I did try /dev/VG1 and /dev/mapper with the same result.

>> I looks like that the logical partitions are not recognize by fsck, but it
>> works fine when I do the same from a properly boot disk.
>>
> fsck works find with LVM. I suspect that you may may have the wrong
> LV and/or VG name. You may want to run lvscan to display the names.
>

   ACTIVE            '/dev/VG1/usr' [7.00 GB] inherit
   ACTIVE            '/dev/VG1/usr_lib' [6.00 GB] inherit
   ACTIVE            '/dev/VG1/usr_local' [5.00 GB] inherit
   ACTIVE            '/dev/VG1/usr_src' [5.00 GB] inherit
   ACTIVE            '/dev/VG1/tmp' [2.00 GB] inherit
   ACTIVE            '/dev/VG1/home' [9.00 GB] inherit
   ACTIVE            '/dev/VG1/backup' [9.00 GB] inherit
   ACTIVE            '/dev/VG1/iso_image' [10.00 GB] inherit

When I boot from the working disk.

Some ideas ?

Regards

-- 
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  Patrick DUPRÉ                      |   |
  Department of Chemistry            |   |    Phone: (44)-(0)-1904-434384
  The University of York             |   |    Fax:   (44)-(0)-1904-432516
  Heslington                         |   |
  York YO10 5DD  United Kingdom      |   |    email: pd520 at york.ac.uk
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