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HP-UX Volume (Disk) and File system functions

Here are some HP-UX Commands that will come handy with Volumes and Filesystem.

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

8. 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