Hi,
I found a good document on hp-ux LVM and like to share with you guys.
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
Following the Rules
Not everyone follow all the rules.
When you take up the advice from someone, you have to follow it.
Just thinking about the guys who have got a chance in a short period will not give you a same kind of break.
we may have to prepare within the available free time and the environment we get to get into that position.
Some of the guys actually my friends have taken the first step of my advice "Completing a Certification".
This is a great achievement. A certification is like a graduation or even more than that, as I feel.
A degree like BE alone will not give you a job nowadays and also Diploma with many years of experience also will not get you a right job which you want.
But a certification relevant to your experience or interest will really get you a good job.
Now I have two three real time experience ie some of the guys who take up my advice got placed in good companies now.
Will tell you the full story(case study) later. I guided him through the whole process and finally he got into a good concern that too into a job he was really interested into.
To achieve anything you have to work out. Nowadays there is a big challenge for really skilled guys.
Wherein people make fake Resumes and give fake interviews and also arrange somebody to attend the interviews and they get into the job. So the real talents are missing the opportunity and left unnoticed.
But nowadays all the concern take necessary steps to filter the fake Resumes and do the background check thorough to find out those guys.
UNIX interviews will the toughest in all interviews and we have to prepare in all aspect before attending the interview.
When you take up the advice from someone, you have to follow it.
Just thinking about the guys who have got a chance in a short period will not give you a same kind of break.
we may have to prepare within the available free time and the environment we get to get into that position.
Some of the guys actually my friends have taken the first step of my advice "Completing a Certification".
This is a great achievement. A certification is like a graduation or even more than that, as I feel.
A degree like BE alone will not give you a job nowadays and also Diploma with many years of experience also will not get you a right job which you want.
But a certification relevant to your experience or interest will really get you a good job.
Now I have two three real time experience ie some of the guys who take up my advice got placed in good companies now.
Will tell you the full story(case study) later. I guided him through the whole process and finally he got into a good concern that too into a job he was really interested into.
To achieve anything you have to work out. Nowadays there is a big challenge for really skilled guys.
Wherein people make fake Resumes and give fake interviews and also arrange somebody to attend the interviews and they get into the job. So the real talents are missing the opportunity and left unnoticed.
But nowadays all the concern take necessary steps to filter the fake Resumes and do the background check thorough to find out those guys.
UNIX interviews will the toughest in all interviews and we have to prepare in all aspect before attending the interview.
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