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[linux-lvm] Error in "lvcreate" in LVM2



 
Hi,
    I am using mandrake 10.2 , and have installed
    1)device-mapper.1.01.05.tgz
    2)LVM2.2.01.15.tgz
    and have untar the patches in "/usr/src/linux-2.6.11-6mdk"

I have succesfully created physical volume using :         pvcreate
then created volume group using                        :         vgcreate



[root localhost ~]# vgdisplay
  --- Volume group ---
  VG Name               volume1
  System ID
  Format              &n! bsp; lvm2
  Metadata Areas        2
  Metadata Sequence No  1
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                0
  Open LV               0
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               6.35 GB
  PE Size               4.00 MB
  Total PE              1626
  Alloc PE / Size       0 / 0
  Free  PE / Size       1626 / 6.35 GB
  VG UUID               zZO4ie-mfY7-st4p-G6ah-tnyf-S5Nt-7AWkzu


but while creating  logical volumes from volume group i get following messages :

[root localhost ~]# lvcreate -L1500 -nshash volume1

  /proc/misc: No entry for device-mapper found
  Is device-map! per driver missing from kernel?
  Failure to communicate with kernel device-mapper driver.
  striped: Required device-mapper target(s) not detected in your kernel
  lvcreate: Create a logical volume

lvcreate
        [-A|--autobackup {y|n}]
        [--addtag Tag]
        [--alloc AllocationPolicy]
        [-C|--contiguous {y|n}]
        [-d|--debug]
        [-h|-?|--help]
        [-i|--stripes Stripes [-I|--stripesize StripeSize]]
        {-l|--extents LogicalExtentsNumber |
         -L|--size LogicalVolumeSize[kKmMgGtT]}
        [-M|--persi! stent {y|n}] [--major major] [--minor minor]
        [-m|--mirrors Mirrors]
        [-n|--name LogicalVolumeName]
        [-p|--permission {r|rw}]
        [-r|--readahead ReadAheadSectors]
        [-R|--regionsize MirrorLogRegionSize]
        [-t|--test]
        [--type VolumeType]
        [-v|--verbose]
        [-Z|--zero {y|n}]
        [--version]
        VolumeGroupName [PhysicalVolumePath...]

lvcreate -s|--snapshot
        [-c|--chunksize]
        [-A|--a! utobackup {y|n}]
        [--addtag Tag]
        [--alloc AllocationPolicy]
        [-C|--contiguous {y|n}]
        [-d|--debug]
        [-h|-?|--help]
        [-i|--stripes Stripes [-I|--stripesize StripeSize]]
        {-l|--extents LogicalExtentsNumber |
         -L|--size LogicalVolumeSize[kKmMgGtT]}
        [-M|--persistent {y|n}] [--major major] [--minor minor]
        [-n|--name LogicalVolumeName]
        [-p|--permission {r|rw}]
        [-r|--readahead ReadAheadSectors]
        [-t|--test]
        [-v|--verbose]
        [--version]
        OriginalLogicalVolume[Path] [PhysicalVolumePath...]

------------------------------------------------------------------------------------------------

[root localhost ~]# lvcreate -i2 -I8 -l100 -nanothervolume1 volume1
 
  /proc/misc: No entry for device-mapper found
  Is device-mapper driver missing from kernel?
  Failure to communicate with kernel device-mapper driver.
  striped: Required device-mapper target(s) not detected in your kernel
  lvcreate: Create a logical volume

lvcreate
        [-A|--autobackup {y|n}]
        [--addtag Tag]
      &nb! sp; [--alloc AllocationPolicy]
        [-C|--contiguous {y|n}]
        [-d|--debug]
        [-h|-?|--help]
        [-i|--stripes Stripes [-I|--stripesize StripeSize]]
        {-l|--extents LogicalExtentsNumber |
         -L|--size LogicalVolumeSize[kKmMgGtT]}
        [-M|--persistent {y|n}] [--major major] [--minor minor]
        [-m|--mirrors Mirrors]
        [-n|--name LogicalVolumeName]
        [-p|--permission {r|rw}]
        [-r|--readahead ReadAheadSectors]
        [-R|--regionsize MirrorLogRegionSize]
        [-t|--test]
        [--type VolumeType]
        [-v|--verbose]
        [-Z|--zero {y|n}]
        [--version]
        VolumeGroupName [PhysicalVolumePath...]

lvcreate -s|--snapshot
        [-c|--chunksize]
        [-A|--autobackup {y|n}]
        [--addtag Tag]
        [--alloc AllocationPolicy]
        [-C|--contiguous {y|n}]
        [-d|--debug]
        [-h|-?|--help]
        [-i|--str! ipes Stripes [-I|--stripesize StripeSize]]
        {-l|--extents LogicalExtentsNumber |
         -L|--size LogicalVolumeSize[kKmMgGtT]}
        [-M|--persistent {y|n}] [--major major] [--minor minor]
        [-n|--name LogicalVolumeName]
        [-p|--permission {r|rw}]
        [-r|--readahead ReadAheadSectors]
        [-t|--test]
        [-v|--verbose]
        [--version]
        OriginalLogicalVolume[Path] [PhysicalVolumePath...]

please help me ....
what is the problem here?
                                                                    -Shashank K.
                                                                      PhD C.S.
                                                                      IIT POWOI
                                                                      INDIA



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