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HP-UX: Disk and Filesystem tasks

   Search for attached disk

                ioscan -fnC disk

   Initialize a disk for use with LVM

                pvcreate -f /dev/rdsk/c0t1d0

   Create the device structure needed for a new volume group.

                 cd /dev
                 mkdir vgdata
                 cd vgdata
                 mknod group c 64 0x010000

  Create volume group vgdata

                 vgcreate vgdata  /dev/dsk/c0t1d0

                { if your expecting to use more than 16 physical disks use the -p option, range from 1 to 256 disks. }

   Display volume group vgdata

                 vgdisplay -v vg01

   Add another disk to volume group

                 pvcreate -f /dev/rdsk/c0t4d0

                 vgextend vg01 /dev/dsk/c0t4d0

    Remove disk from volume group

                 vgreduce vg01 /dev/dsk/c0t4d0

     Create a 100 MB logical volume lvdata

                 lvcreate -L 100 -n lvdata vgdata
                 newfs -F vxfs  /dev/vgdata/rlvdata

      Extend logical volume to 200 MB

                 lvextend -L 200 /dev/vgdata/lvdata

      Extend file system to 200 MB

                 { if you don't have Online JFS  installed volumes must be unmounted before you can extend the file system.  }

                 fuser -ku /dev/vgdata/lvdata                        { kill all process that has open files on this volume. }

                 umount /dev/vgdata/lvdata
                 extendfs /data

                 { for  Online JFS,     200 MB  / 4 MB  = 50 LE; 50 x 1024 = 51200 blocks }

                  fsadm -F vxfs -b 51200 /data

        Set largefiles to support files greater than 2GB

                  fsadm -F vxfs -o largefiles /data

Exporting and Importing disks across system.

        1.  make the volume group unavailable

               vgchange -a n /dev/vgdata

        2. Export the the disk while creating a logical volume map file.

                vgexport -v -m data_map vgdata

        3.  Disconnect the drives and move to new system.

        4.   Move the data_map file to the new system.

        5.  On the new system recreate the volume group directory

                 mkdir /dev/vgdata
                 mknod /dev/vgdata/group c 64 0x02000

        6. Import the disks to the new system

                  vgimport -v -m data_map /dev/vgdata  /dev/dsk/c2t1d0 /dev/dsk/c2t2d0

        7.  Enable the new volume group

                  vgchange -a y /dev/vgdata

 Renaming a logical volume

          /dev/vgdata/lvol1  -> /dev/vgdata/data_lv

         umount /dev/vgdata/lvol1
         ll  /dev/vgdata/lvol1                                      take note of the minor ( e.g 0x010001 )
                        brw-r-----   1 root       root        64 0x010001 Dec 31 17:59 lvol1

         mknod  /dev/vgdata/data_lv b 64 0x010001       create new logical volume name
         mknod  /dev/vgdata/rdata_lv c 64 0x010001

         vi /etc/fstab                                               { reflect the new logical volume  }
         mount -a
         rmsf /dev/vgdata/lvol1
         rmsf /dev/vgdata/rlvol1

Managing Systems and Workgroup Chap. 6

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